copy from github

README.md

@@ -1,2 +1,4 @@
 # blog
+bing的博客
 
+## [kubernetes](kubernetes/readme.md)

algorithms/branch_and_bound/bnb.cpp

@@ -0,0 +1,180 @@
+#include <iostream>
+#include <vector>
+using namespace std;
+
+vector<vector<int>> randMatrix(int x, int y)
+{
+    vector<vector<int>> matrix(x);
+    for (int i = 0; i < x; i++)
+    {
+        matrix[i].resize(y);
+        for (int j = 0; j < y; j++)
+        {
+            matrix[i][j] = rand() % 100;
+        }
+    }
+    return matrix;
+}
+
+void display(vector<vector<int>> matrix, int x, int y)
+{
+    for (int i = 0; i < x; i++)
+    {
+        for (int j = 0; j < y; j++)
+        {
+            cout << matrix[i][j] << " ";
+        }
+        cout << endl;
+    }
+    cout << endl;
+}
+
+vector<int> up(vector<vector<int>> matrix, int x, int y)
+{
+    auto res = vector<int>(3) = {-1, -1, -1};
+    if (x == 0)
+    {
+        return res;
+    }
+    res[0] = matrix[x - 1][y];
+    res[1] = x - 1;
+    res[2] = y;
+    return res;
+}
+
+vector<int> down(vector<vector<int>> matrix, int x, int y)
+{
+    auto res = vector<int>(3) = {-1, -1, -1};
+
+    auto xlen = matrix.size();
+    if (x == xlen - 1)
+    {
+        return res;
+    }
+    res[0] = matrix[x + 1][y];
+    res[1] = x + 1;
+    res[2] = y;
+    return res;
+}
+
+vector<int> left(vector<vector<int>> matrix, int x, int y)
+{
+    auto res = vector<int>(3) = {-1, -1, -1};
+
+    if (y == 0)
+    {
+        return res;
+    }
+    res[0] = matrix[x][y - 1];
+    res[1] = x;
+    res[2] = y - 1;
+    return res;
+}
+
+vector<int> right(vector<vector<int>> matrix, int x, int y)
+{
+    auto res = vector<int>(3) = {-1, -1, -1};
+
+    auto row = matrix[x];
+    auto ylen = row.size();
+    if (y == ylen - 1)
+    {
+        return res;
+    }
+    res[0] = matrix[x][y + 1];
+    res[1] = x;
+    res[2] = y + 1;
+    return res;
+}
+
+vector<vector<vector<int>>> branch(vector<vector<int>> matrix, int x, int y)
+{
+    auto branch = vector<vector<vector<int>>>(x * y);
+    auto index = 0;
+    for (int i = 0; i < x; i++)
+    {
+        for (int j = 0; j < y; j++)
+        {
+            branch[index].resize(7);
+            branch[index][0].resize(1);
+            branch[index][0][0] = matrix[i][j];
+            branch[index][1].resize(1);
+
+            branch[index][1][0] = i;
+            branch[index][2].resize(1);
+
+            branch[index][2][0] = j;
+
+            branch[index][3] = up(matrix, i, j);
+
+            branch[index][4] = down(matrix, i, j);
+            branch[index][5] = left(matrix, i, j);
+            branch[index][6] = right(matrix, i, j);
+            index++;
+        }
+    }
+    return branch;
+}
+
+int finditem(vector<vector<vector<int>>> branches, int tx, int ty, int plen = 0)
+{
+    int ulen, dlen, llen, rlen;
+    ulen = dlen = llen = rlen = plen;
+    for (auto vi : branches)
+    {
+        if (vi[1][0] == tx && vi[2][0] == ty)
+        { //找到元素
+            if (vi[3][0] > vi[0][0])
+            { //上
+                cout << "up [" << vi[3][0] << "] is great than me [" << vi[0][0] << "]" << endl;
+                ulen++;
+                ulen = finditem(branches, vi[3][1], vi[3][2], ulen);
+            }
+            if (vi[4][0] > vi[0][0])
+            { //下
+                cout << "down [" << vi[4][0] << "] is great than me [" << vi[0][0] << "]" << endl;
+                dlen++;
+                dlen = finditem(branches, vi[4][1], vi[4][2], dlen);
+            }
+            if (vi[5][0] > vi[0][0])
+            { //左
+                cout << "left [" << vi[5][0] << "] is great than me [" << vi[0][0] << "]" << endl;
+                llen++;
+                llen = finditem(branches, vi[5][1], vi[5][2], llen);
+            }
+            if (vi[6][0] > vi[0][0])
+            { //右
+                cout << "right [" << vi[6][0] << "] is great than me [" << vi[0][0] << "]" << endl;
+                rlen++;
+                rlen = finditem(branches, vi[6][1], vi[6][2], rlen);
+            }
+        }
+    }
+    plen = ulen;
+    if (plen < dlen)
+    {
+        plen = dlen;
+    }
+    if (plen < llen)
+    {
+        plen = llen;
+    }
+    if (plen < rlen)
+    {
+        plen = rlen;
+    }
+    return plen;
+}
+
+int main()
+{
+    const int x = 4;
+    const int y = 4;
+    auto matrix = randMatrix(x, y);
+    display(matrix, x, y);
+    auto branches = branch(matrix, x, y);
+    // display(branches, x * y, 7);
+    auto plen = finditem(branches, 0, 3);
+    cout << matrix[0][3] << "\t" << plen << endl;
+    return 0;
+}

algorithms/branch_and_bound/readme.md

@@ -0,0 +1,210 @@
+# 分支定界法
+
+分支定界法（branch and bound）是一种求解整数规划问题的最常用算法。这种方法不但可以求解纯整数规划，还可以求解混合整数规划问题。分支定界法是一种搜索与迭代的方法，选择不同的分支变量和子问题进行分支。
+
+通常，把全部可行解空间反复地分割为越来越小的子集，称为分支；并且对每个子集内的解集计算一个目标下界（对于最小值问题），这称为定界。在每次分枝后，凡是界限超出已知可行解集目标值的那些子集不再进一步分枝，这样，许多子集可不予考虑，这称剪枝。这就是分枝定界法的主要思路。
+
+***[百度百科](https://baike.baidu.com/item/%E5%88%86%E6%94%AF%E5%AE%9A%E7%95%8C%E6%B3%95)***
+
+## 问题示例
+
+最近在群里看到一个问题：
+
+给定m * n矩阵matrix，可以从任意位置开始，向上、向下、向左、向右移动，但要求下一个位置上的元素要大于当前元素。找出最长的递增路径长度。
+
+如图，矩阵元素`5`的上下左右分别是`2`,`8`,`4`,`6`
+
+![matrix](matrix.png)
+
+根据某算法大佬的指导，使用分支定界法解决此问题。
+
+将矩阵的每一个元素作为第一级分支A，对于每一个分支A相邻的上下左右四个元素，作为分支A的子分支B
+
+选定一个元素An, 对比An与AnBm的大小，当An小于AnBm时，找到AnBm对于的元素Ax，递归循环处理，直至找不到AnBm。每递归一次，路径长度+1，最后返回最大的路径长度。
+
+### 代码示例
+
+[代码文件](bnb.cpp)(*这是一份快速实现的代码，所以不一定是最优。*)
+
+```cpp
+#include <iostream>
+#include <vector>
+using namespace std;
+
+vector<vector<int>> randMatrix(int x, int y)
+{
+    vector<vector<int>> matrix(x);
+    for (int i = 0; i < x; i++)
+    {
+        matrix[i].resize(y);
+        for (int j = 0; j < y; j++)
+        {
+            matrix[i][j] = rand() % 100;
+        }
+    }
+    return matrix;
+}
+
+void display(vector<vector<int>> matrix, int x, int y)
+{
+    for (int i = 0; i < x; i++)
+    {
+        for (int j = 0; j < y; j++)
+        {
+            cout << matrix[i][j] << " ";
+        }
+        cout << endl;
+    }
+    cout << endl;
+}
+
+vector<int> up(vector<vector<int>> matrix, int x, int y)
+{
+    auto res = vector<int>(3) = {-1, -1, -1};
+    if (x == 0)
+    {
+        return res;
+    }
+    res[0] = matrix[x - 1][y];
+    res[1] = x - 1;
+    res[2] = y;
+    return res;
+}
+
+vector<int> down(vector<vector<int>> matrix, int x, int y)
+{
+    auto res = vector<int>(3) = {-1, -1, -1};
+
+    auto xlen = matrix.size();
+    if (x == xlen - 1)
+    {
+        return res;
+    }
+    res[0] = matrix[x + 1][y];
+    res[1] = x + 1;
+    res[2] = y;
+    return res;
+}
+
+vector<int> left(vector<vector<int>> matrix, int x, int y)
+{
+    auto res = vector<int>(3) = {-1, -1, -1};
+
+    if (y == 0)
+    {
+        return res;
+    }
+    res[0] = matrix[x][y - 1];
+    res[1] = x;
+    res[2] = y - 1;
+    return res;
+}
+
+vector<int> right(vector<vector<int>> matrix, int x, int y)
+{
+    auto res = vector<int>(3) = {-1, -1, -1};
+
+    auto row = matrix[x];
+    auto ylen = row.size();
+    if (y == ylen - 1)
+    {
+        return res;
+    }
+    res[0] = matrix[x][y + 1];
+    res[1] = x;
+    res[2] = y + 1;
+    return res;
+}
+
+vector<vector<vector<int>>> branch(vector<vector<int>> matrix, int x, int y)
+{
+    auto branch = vector<vector<vector<int>>>(x * y);
+    auto index = 0;
+    for (int i = 0; i < x; i++)
+    {
+        for (int j = 0; j < y; j++)
+        {
+            branch[index].resize(7);
+            branch[index][0].resize(1);
+            branch[index][0][0] = matrix[i][j];
+            branch[index][1].resize(1);
+
+            branch[index][1][0] = i;
+            branch[index][2].resize(1);
+
+            branch[index][2][0] = j;
+
+            branch[index][3] = up(matrix, i, j);
+
+            branch[index][4] = down(matrix, i, j);
+            branch[index][5] = left(matrix, i, j);
+            branch[index][6] = right(matrix, i, j);
+            index++;
+        }
+    }
+    return branch;
+}
+
+int finditem(vector<vector<vector<int>>> branches, int tx, int ty, int plen = 0)
+{
+    int ulen, dlen, llen, rlen;
+    ulen = dlen = llen = rlen = plen;
+    for (auto vi : branches)
+    {
+        if (vi[1][0] == tx && vi[2][0] == ty)
+        { //找到元素
+            if (vi[3][0] > vi[0][0])
+            { //上
+                cout << "up [" << vi[3][0] << "] is great than me [" << vi[0][0] << "]" << endl;
+                ulen++;
+                ulen = finditem(branches, vi[3][1], vi[3][2], ulen);
+            }
+            if (vi[4][0] > vi[0][0])
+            { //下
+                cout << "down [" << vi[4][0] << "] is great than me [" << vi[0][0] << "]" << endl;
+                dlen++;
+                dlen = finditem(branches, vi[4][1], vi[4][2], dlen);
+            }
+            if (vi[5][0] > vi[0][0])
+            { //左
+                cout << "left [" << vi[5][0] << "] is great than me [" << vi[0][0] << "]" << endl;
+                llen++;
+                llen = finditem(branches, vi[5][1], vi[5][2], llen);
+            }
+            if (vi[6][0] > vi[0][0])
+            { //右
+                cout << "right [" << vi[6][0] << "] is great than me [" << vi[0][0] << "]" << endl;
+                rlen++;
+                rlen = finditem(branches, vi[6][1], vi[6][2], rlen);
+            }
+        }
+    }
+    plen = ulen;
+    if (plen < dlen)
+    {
+        plen = dlen;
+    }
+    if (plen < llen)
+    {
+        plen = llen;
+    }
+    if (plen < rlen)
+    {
+        plen = rlen;
+    }
+    return plen;
+}
+
+int main()
+{
+    const int x = 4;
+    const int y = 4;
+    auto matrix = randMatrix(x, y);
+    display(matrix, x, y);
+    auto branches = branch(matrix, x, y);
+    // display(branches, x * y, 7);
+    auto plen = finditem(branches, 0, 3);
+    cout << matrix[0][3] << "\t" << plen << endl;
+    return 0;
+}
+```

autotest/appium/installation.md

@@ -0,0 +1,74 @@
+# 安装appium
+
+本安装文档仅在appium1.21上测试通过。
+
+## 配置运行环境
+
+### 运行环境依赖项目
+
+环境|版本|说明
+--|--|--
+MAC OS |11.4|
+xcode|9.4.3
+nodejs|12
+python|3.5.8
+Homebrew|3.2.1|
+
+### 安装依赖
+
+#### Homebrew
+
+官方安装方法
+
+```
+/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"
+```
+
+由于官方地址通常会被墙，建议使用gitee上的
+
+```
+/bin/zsh -c "$(curl -fsSL https://gitee.com/cunkai/HomebrewCN/raw/master/Homebrew.sh)"
+```
+
+#### nodejs
+
+使用`brew`安装
+
+```
+brew install nodejs
+```
+
+下载官方二进制包
+
+```
+cd /opt
+sudo wget https://nodejs.org/dist/v14.17.3/node-v14.17.3-darwin-x64.tar.gz
+sudo tar node-v14.17.3-darwin-x64.tar.gz
+sudo ln -s node-v14.17.3-darwin-x64 node
+sudo echo 'PATH=$PATH:/opt/node/bin' >> /etc/profile
+```
+
+#### appium
+
+下载官方版本安装
+
+```
+https://github.com/appium/appium-desktop/releases/download/v1.21.0/Appium-mac-1.21.0.dmg
+```
+
+#### appium-doctor
+
+使用npm安装
+
+```
+npm install -g appium-doctor
+```
+
+#### 其他依赖
+
+暂时还没统计。
+
+### 配置环境
+
+使用 `appium-doctor --ios`检测，确保每项都是`√`
+

autotest/appium/readme.md

@@ -0,0 +1 @@
+# appium

demo/Dockerfile

@@ -0,0 +1,12 @@
+FROM golang:1.15 as builder
+WORKDIR /workspace
+ENV GOPROXY=https://goproxy.cn,direct GO111MODULE=on
+COPY main.go main.go
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -a -o main main.go && mkdir /data
+
+FROM scratch
+COPY --from=builder /workspace/main /
+COPY --from=builder /data /
+VOLUME ["/data"]
+EXPOSE 8080
+ENTRYPOINT ["/main"]

demo/Makefile

@@ -0,0 +1,10 @@
+IMAGE="registry.bing89.com/tools/demo:1.0"
+
+# Build the docker image
+docker-build: 
+	docker build . -t ${IMAGE}
+
+# Push the docker image
+docker-push: docker-build
+	docker push ${IMAGE}
+

demo/main.go

@@ -0,0 +1,73 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"net/http"
+	"net"
+)
+
+func get(resp http.ResponseWriter, req *http.Request){
+	hostname, err := os.Hostname()
+	if err != nil {
+		resp.Write([]byte(fmt.Sprintf("get hostname error:%v", err)))
+		return
+	}
+	addrs, err := net.InterfaceAddrs()
+	if err != nil {
+		resp.Write([]byte(fmt.Sprintf("get ip address error:%v", err)))
+		return
+	}
+	addrString := ""
+	for _, addr := range addrs{
+		addrString += " " + addr.String()
+	}
+	resp.Write([]byte(fmt.Sprintf("response from host: %s, ip is:%s", hostname, addrString)))
+}
+
+//read the file which path is "/data/test.txt"
+func readFile(resp http.ResponseWriter, req *http.Request){
+	file, err := os.Open("/data/test.txt")
+	if err != nil {
+		resp.Write([]byte(fmt.Sprintf("open /data/test.txt error:%v", err)))
+		return
+	}
+	defer file.Close()
+	data := make([]byte, 1024)
+	n, err := file.Read(data)
+	if err != nil {
+		resp.Write([]byte(fmt.Sprintf("read /data/test.txt error:%v", err)))
+		return
+	}
+	resp.Write(data[0:n])
+}
+
+//write a string to the file
+func writeFile(resp http.ResponseWriter, req *http.Request){
+	file, err := os.OpenFile("/data/test.txt", os.O_RDWR|os.O_APPEND, os.ModePerm)
+	if err != nil {
+		resp.Write([]byte(fmt.Sprintf("open /data/test.txt error:%v", err)))
+		return
+	}
+	defer file.Close()
+	hostname, _ := os.Hostname()
+	_, err = file.Write([]byte(fmt.Sprintf("write by pod %s", hostname)))
+	if err != nil {
+		resp.Write([]byte(fmt.Sprintf("write /data/test.txt error:%v", err)))
+		return
+	}
+	resp.Write([]byte("write file successed."))
+}
+
+func main (){
+	router := http.DefaultServeMux
+	router.HandleFunc("/", get)
+	router.HandleFunc("/read", readFile)
+	router.HandleFunc("/write", writeFile)
+	log.Println("listen on 0.0.0.0:8080")
+	err := http.ListenAndServe("0.0.0.0:8080", nil)
+	if err != nil {
+		log.Fatalln(err)
+	}
+}

demo/readme.md

@@ -0,0 +1,16 @@
+# demo
+
+这是一个由go语言编写的基本http服务，用于各种测试。
+
+## 编译
+
+```bash
+CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o main main.go
+```
+
+## 打包
+
+```bash
+docker build -t demo:1.0 .
+```
+

docker/registry/docker-registry.yaml

@@ -0,0 +1,84 @@
+kind: Namespace
+apiVersion: v1
+metadata:
+  name: bing
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: docker-registry
+data:
+  config.yml: |
+    version: 0.1
+    log:
+      fields:
+        service: registry
+    storage:
+      cache:
+        blobdescriptor: inmemory
+      filesystem:
+        rootdirectory: /var/lib/registry
+    http:
+      addr: :5000
+      headers:
+        X-Content-Type-Options: [nosniff]
+    health:
+      storagedriver:
+        enabled: true
+        interval: 10s
+        threshold: 3
+
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: registry
+  namespace: bing
+spec:
+  selector:
+    matchLabels:
+      app: registry
+      version: "2.0"
+  template:
+    metadata:
+      labels:
+        app: registry
+        version: "2.0"
+    spec:
+      containers:
+      - name: registry
+        image: registry:2
+        resources:
+          limits:
+            memory: "512Mi"
+            cpu: "500m"
+        ports:
+        - containerPort: 5000
+        volumeMounts:
+          - name: library
+            mountPath: /var/lib/registry
+          - name: config
+            mountPath: /etc/docker/registry
+      volumes:
+        - name: library
+          nfs:
+            path: /data2/registry
+            server: 192.168.0.248
+        - name: config
+          configMap:
+            name: docker-registry
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: registry
+  namespace: bing
+spec:
+  selector:
+    app: registry
+    version: "2.0"
+  ports:
+  - port: 5000
+    targetPort: 5000
+    nodePort: 30500
+  type: NodePort

docker/registry/registy.nginx.conf

@@ -0,0 +1,38 @@
+upstream docker-registry {
+    server 172.16.0.3:20500;
+}
+
+server {
+    listen 443;
+    server_name registry.bing89.com;
+    ssl on;
+    ssl_certificate    conf.d/ssl/registry.bing89.com.pem;
+    ssl_certificate_key conf.d/ssl/registry.bing89.com.key;
+    proxy_set_header Host      $http_host;
+    proxy_set_header X-Real-IP  $remote_addr;
+    client_max_body_size 0;
+    chunked_transfer_encoding on;
+    add_header 'Docker-Distribution-Api-Version' 'registry/2.0' always;
+    location / {
+        auth_basic              "Restricted";
+        auth_basic_user_file    conf.d/auth/registry.bing89.com.txt;
+        proxy_set_header  Host              $http_host;
+        proxy_set_header  X-Real-IP        $remote_addr;
+        proxy_set_header  X-Forwarded-For  $proxy_add_x_forwarded_for;
+        proxy_set_header  X-Forwarded-Proto $scheme;
+        proxy_read_timeout                  900;
+        proxy_pass http://docker-registry;
+    }
+    location /_ping {
+        auth_basic off;
+        proxy_pass http://docker-registry;
+    }
+    location /v2/_ping {
+        auth_basic off;
+        proxy_pass http://docker-registry;
+    }
+    location /v2/_catalog {
+        auth_basic off;
+        proxy_pass http://docker-registry;
+    }
+}

etcd/backup_restore.md

@@ -0,0 +1,6 @@
+# etcd 备份与还原
+
+## 备份
+
+[参考](https://github.com/coreos/etcd-operator/blob/master/example/etcd-backup-operator/backup_cr.yaml)
+[参考](https://kubernetes.io/zh/docs/tasks/administer-cluster/configure-upgrade-etcd/)

etcd/readme.md

@@ -0,0 +1 @@
+# etcd

go.mod

@@ -0,0 +1,46 @@
+module blog.bing89.com
+
+go 1.17
+
+require (
+	github.com/coreos/go-oidc/v3 v3.1.0
+	github.com/spf13/cobra v1.3.0
+	k8s.io/api v0.23.1
+	k8s.io/apimachinery v0.23.1
+	k8s.io/client-go v0.23.1
+)
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/go-logr/logr v1.2.0 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/google/go-cmp v0.5.6 // indirect
+	github.com/google/gofuzz v1.1.0 // indirect
+	github.com/googleapis/gnostic v0.5.5 // indirect
+	github.com/imdario/mergo v0.3.5 // indirect
+	github.com/inconshreveable/mousetrap v1.0.0 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+	golang.org/x/crypto v0.0.0-20210817164053-32db794688a5 // indirect
+	golang.org/x/net v0.0.0-20211209124913-491a49abca63 // indirect
+	golang.org/x/oauth2 v0.0.0-20211104180415-d3ed0bb246c8 // indirect
+	golang.org/x/sys v0.0.0-20211205182925-97ca703d548d // indirect
+	golang.org/x/term v0.0.0-20210615171337-6886f2dfbf5b // indirect
+	golang.org/x/text v0.3.7 // indirect
+	golang.org/x/time v0.0.0-20210723032227-1f47c861a9ac // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	google.golang.org/protobuf v1.27.1 // indirect
+	gopkg.in/inf.v0 v0.9.1 // indirect
+	gopkg.in/square/go-jose.v2 v2.5.1 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
+	k8s.io/klog/v2 v2.30.0 // indirect
+	k8s.io/kube-openapi v0.0.0-20211115234752-e816edb12b65 // indirect
+	k8s.io/utils v0.0.0-20210930125809-cb0fa318a74b // indirect
+	sigs.k8s.io/json v0.0.0-20211020170558-c049b76a60c6 // indirect
+	sigs.k8s.io/structured-merge-diff/v4 v4.1.2 // indirect
+	sigs.k8s.io/yaml v1.2.0 // indirect
+)

go.sum

@@ -0,0 +1,897 @@
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go/commandline/cobra/cobra.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+
+func main(){
+	cmd := cobra.Command{
+		Use: "cobra",
+		Short: "this is a cobra demo",
+		Run: func(cmd *cobra.Command, args []string){
+			fmt.Println("good! you run a cobra command!")
+		},
+	}
+	var newLine *bool
+	subCmd := cobra.Command{
+		Use: "echo",
+		Short: "echo your input",
+		Run: func(cmd *cobra.Command, args []string){
+			for _, arg := range args {
+				if newLine != nil && *newLine{
+					fmt.Println(arg)
+				}else{
+					fmt.Printf("%s ", arg)
+				}
+			}
+			if newLine == nil || ! *newLine{
+				fmt.Println()
+			}
+		},
+	}
+	newLine = subCmd.Flags().BoolP("newline", "n", false, "display one word per line")
+
+	cmd.AddCommand(&subCmd)
+	cmd.Execute()
+}

go/commandline/cobra/readme.md

@@ -0,0 +1,83 @@
+# cobra
+
+[cobra](http://github.com/spf13/cobra) 是一个强大开源的go命令行包，很多开源项目都使用cobra实现启动入口，如kubernetes。
+
+# 安装
+
+```bash
+go get github.com/spf13/cobra
+```
+
+# 使用
+
+使用cobra需要先创建一个`Command`对象，然后执行这个对象的`Execute`方法
+
+```go
+cmd := cobra.Command{Use: "cobra"}
+cmd.Execute()
+```
+
+上面的代码没有任何功能,任何参数都不进行处理。
+
+现在来扩展一下
+
+```go
+cmd := cobra.Command{
+    Use: "cobra",
+    Short: "this is a cobra demo",
+    Run: func(cmd *cobra.Command, args []string){
+        fmt.Println("good! you run a cobra command!")
+    },
+}
+cmd.Execute()
+```
+
+这里为cmd赋值了两个属性`Short` 和`Run`。 `Short` 就是帮助信息的简短说明，`Run` 就是命令行命中时执行的方法。 由于现在只有一个根命令，所以执行的话会打印`good! you run a cobra command!` 添加任何命参数(`-`开头)将会显示错误及usage信息。
+
+下面为cmd添加一个子命令，并处理参数`-n`
+
+```go
+cmd := cobra.Command{
+    Use: "cobra",
+    Short: "this is a cobra demo",
+    Run: func(cmd *cobra.Command, args []string){
+        fmt.Println("good! you run a cobra command!")
+    },
+}
+var newLine *bool
+subCmd := cobra.Command{
+    Use: "echo",
+    Short: "echo your input",
+    Run: func(cmd *cobra.Command, args []string){
+        for _, arg := range args {
+            if newLine != nil && *newLine{
+                fmt.Println(arg)
+            }else{
+                fmt.Printf("%s ", arg)
+            }
+        }
+        if newLine == nil || ! *newLine{
+            fmt.Println()
+        }
+    },
+}
+newLine = subCmd.Flags().BoolP("newline", "n", false, "display one word per line")
+
+cmd.AddCommand(&subCmd)
+cmd.Execute()
+```
+
+这是一个简单的`echo`程序， cmd 拥有一个子命令 `subCmd`, `subCmd`通过`echo`(`Use: "echo"`)调用。`newLine = subCmd.Flags().BoolP("newline", "n", false, "display one word per line")` 为`subCmd` 添加了一个可选布尔型参数`-n`或`--newline`，这个参数的默认值是`false`。`newLine` 记录这个参数的值并在`Run`回调方法中使用。
+
+运行结果
+
+```bash
+$ go run cobra.go echo aaa bbb
+aaa bbb
+```
+
+```bash
+$ go run cobra.go echo -n aaa bbb
+aaa
+bbb
+```

go/database/mongo/readme.md

@@ -0,0 +1,99 @@
+# GO 操作 mongodb
+
+go 使用官方驱动[`go.mongodb.org/mongo-driver/mongo`](https://github.com/mongodb/mongo-go-driver)来操作mongo数据库。
+
+## 安装
+
+```bash
+go get go.mongodb.org/mongo-driver/mongo
+```
+
+## 使用
+
+连接
+
+```go
+import (
+    "go.mongodb.org/mongo-driver/mongo"
+    "go.mongodb.org/mongo-driver/mongo/options"
+    "go.mongodb.org/mongo-driver/mongo/readpref"
+)
+
+ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+defer cancel()
+client, err := mongo.Connect(ctx, options.Client().ApplyURI("mongodb://localhost:27017"))
+defer func() {
+    if err = client.Disconnect(ctx); err != nil {
+        panic(err)
+    }
+}()
+```
+
+测试连接
+
+```go
+ctx, cancel = context.WithTimeout(context.Background(), 2*time.Second)
+defer cancel()
+err = client.Ping(ctx, readpref.Primary())
+```
+
+获取collection
+
+```go
+collection := client.Database("testing").Collection("numbers")
+```
+
+## 特殊类型
+
+包 `go.mongodb.org/mongo-driver/bson/primitive` 转换一些数据到mongo类型
+
+### `ISODate`
+
+```go
+t, err := time.Parse("2006-01-02T15:04:05.999", "2021-04-21T11:30:58.883")
+if err != nil {
+    log.Fatal(err)
+}
+t1 := primitive.NewDateTimeFromTime(t.Add(-8 * time.Hour))
+```
+
+## 复杂查询
+
+```js
+db.numbers.find({   "order_source" : 1, "order_history": { $elemMatch: {  "order_status": "27", "change_at": { $gte: ISODate("2021-04-21T11:30:58.883+08:00"),$lte: ISODate("2021-04-21T11:43:58.883+08:00")} } } })
+```
+
+```go
+t, err := time.Parse("2006-01-02T15:04:05.999+08:00", "2021-04-21T11:30:58.883+08:00")
+if err != nil {
+    log.Fatal(err)
+}
+t1 := primitive.NewDateTimeFromTime(t.Add(-8 * time.Hour)) //
+t, err = time.Parse("2006-01-02T15:04:05.999+08:00", "2021-04-21T11:43:58.883+08:00")
+if err != nil {
+    log.Fatal(err)
+}
+t2 := primitive.NewDateTimeFromTime(t.Add(-8 * time.Hour)) //
+filter := bson.M{
+    "order_source" : 1,
+    "order_history": bson.M{
+        "$elemMatch": bson.M{
+            "order_status": "27", 
+            "change_at": bson.M{ "$gte": t1,"$lte": t2},
+        },
+    },
+}
+ctx, cancel = context.WithTimeout(context.Background(), 2*time.Second)
+defer cancel()
+collection.find(ctx, filter)
+```
+
+查询排序
+
+```bash
+opt := options.FindOptions{}
+opt.SetSort(bson.D{{"order_no",1}})
+ctx, cancel = context.WithTimeout(context.Background(), 2*time.Second)
+defer cancel()
+collection.find(ctx, filter, &opt)
+```

go/oidc/main.go

@@ -0,0 +1,43 @@
+package main
+
+import (
+	"context"
+	"net/http"
+
+	"github.com/coreos/go-oidc/v3/oidc"
+	"golang.org/x/oauth2"
+)
+
+var oauth2Config oauth2.Config
+
+var (
+	clientID     = "demo-client"
+	clientSecret = "cbfd6e04-a51c-4982-a25b-7aaba4f30c81"
+
+	redirectURL = "http://localhost:8181/demo/callback"
+	state = "somestate"
+)
+
+func handleRedirect(w http.ResponseWriter, r *http.Request) {
+	http.Redirect(w, r, oauth2Config.AuthCodeURL(state), http.StatusFound)
+}
+
+func main() {
+	provider, err := oidc.NewProvider(context.Background(), "http://localhost:8181/demo/callback")
+	if err != nil {
+		// handle error
+	}
+
+	// Configure an OpenID Connect aware OAuth2 client.
+	oauth2Config = oauth2.Config{
+		ClientID:     clientID,
+		ClientSecret: clientSecret,
+		RedirectURL:  redirectURL,
+
+		// Discovery returns the OAuth2 endpoints.
+		Endpoint: provider.Endpoint(),
+
+		// "openid" is a required scope for OpenID Connect flows.
+		Scopes: []string{oidc.ScopeOpenID, "profile", "email"},
+	}
+}

kubernetes/admin/create_readonly_user.md

@@ -0,0 +1,52 @@
+# 创建一个只读用户
+
+创建证书
+
+```bash
+mkdir temp
+cd temp
+USER=viewer
+openssl genrsa -out ${USER}.key 2048
+openssl req -new -key ${USER}.key -out ${USER}.csr -subj "/CN=${USER}"
+openssl x509 -req -in ${USER}.csr -CA /etc/kubernetes/pki/ca.crt -CAkey /etc/kubernetes/pki/ca.key -CAcreateserial -out ${USER}.crt -days 365
+```
+
+创建用户
+
+```bash
+kubectl create clusterrolebinding kubernetes-viewer --clusterrole=view --user=${USER}
+```
+
+修改配置
+
+```bash
+cp -a ~/.kube/config ./config
+vim config
+```
+
+config示例, 替换其中的${USER}为你的用户名，替换`client-certificate-data`和`client-key-data`为对应值
+
+```yaml
+apiVersion: v1
+clusters:
+- cluster:
+    certificate-authority-data: LS0tLS1CRUdJTiBDRVJUSUZJQ0FURS0tLS0tCk1JSUMvakNDQWVhZ0F3SUJBZ0lCQURBTkJna3Foa2lHOXcwQkFRc0ZBREFWTVJNd0VRWURWUVFERXdwcmRXSmwKY201bGRHVnpNQjRYRFRJeE1Ea3hNekE1TWprek4xb1hEVE14TURreE1UQTVNamt6TjFvd0ZURVRNQkVHQTFVRQpBeE1LYTNWaVpYSnVaWFJsY3pDQ0FTSXdEUVlKS29aSWh2Y05BUUVCQlFBRGdnRVBBRENDQVFvQ2dnRUJBTW4wCmZlaUZuR1pvVjZEVGpabk5zME5UN2ZaRzd4UDQrOVF1eDd6MnRCZ0swVkVzRFhVUEx6VE4wLzNVdXdWaDFYeGwKRmJFNEQrcUJYVjFwLzU1TVBUcGRQWjBQdzVUZlN5NFp6bm1vOTY5cHorNW9OVmtjQnVIMFJFbzB6NjcxNDFYZQphcXFIZnNVcWx4QWJvWUxsV3FoWkp2Sm9JZlBFYXFObE5xUitaaFhmWkhXY0pCRC9OQTB2dXNtVmszVzRTV3VECnF2QUt1MHBVT0RKTnpTcTFpWWx4WG1JUEszNEZQQmVhYnAyb2gxWVMrbVVmNUZMcnM5T05hSUkwSEMyQ3VKRDgKcGtIOTJaakNhT3RrSTVZajcxcEZ0YytQcGQwN0d2OS9DTUxpbGgxSGlwbVBEM2lwMkFUSlFSb01tSnFrcjgvRQpxMjBYbUlkNFh4YXphd1gxR0o4Q0F3RUFBYU5aTUZjd0RnWURWUjBQQVFIL0JBUURBZ0trTUE4R0ExVWRFd0VCCi93UUZNQU1CQWY4d0hRWURWUjBPQkJZRUZQNndyYlBTc2xyWUhxUGMxU25vbTJWdk4rV3hNQlVHQTFVZEVRUU8KTUF5Q0NtdDFZbVZ5Ym1WMFpYTXdEUVlKS29aSWh2Y05BUUVMQlFBRGdnRUJBRkRSaTR5ZXNHKzlTWk10cy9lcAoxcXdIdnBQOUpraHRXbnBlTndaRzlzcU1BSW9TeHcvK01CNXh4RXRnSzhqTk00NzFvWmxVV3IzZ01vTGNmUUVMCmtvVHNTNTgwV1ZXd1pOODd1QnBqV3I0dWdEWmJoalBBM0hRcVdJdTNMYmd1WUJJdmlVOTFoZU5UKzlFYk9qSlgKVXFwamlnbmw1QVZkSThhYmxNcHZEUnBDZ0lFQjRVQnN4R21BU3BZaTJtSmVqSVNUbTR4U1lGdnZVcC80Q1JzaQpBNUZ4b1FvSjN5MUJHam45a0ZCQ0E0UzFFUlFPMWRFZUhDRVZwQnlRRFhIa0pGb0VZZHBtSTNEYjgvMmlUSTNDCkFSUzBPdGVVejd6Y2tGYzNsbnVxUUtzUnE5V0JQWXdtWlN5ZFZ0dmo2NVZEcVhycWwvVWZOWjFSdTlwU25kQlUKL09rPQotLS0tLUVORCBDRVJUSUZJQ0FURS0tLS0tCg==
+    server: https://10.0.1.43:6443
+  name: kubernetes
+contexts:
+- context:
+    cluster: kubernetes
+    user: ${USER}
+  name: ${USER}@kubernetes
+current-context: ${USER}@kubernetes
+kind: Config
+preferences: {}
+users:
+- name: intbee
+  user:
+    # data from result of command: cat ${USER}.crt | base64 --wrap=0
+    client-certificate-data: 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
+
+   # data from result of command: cat ${USER}.key | base64 --wrap=0
+    client-key-data:  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
+```

kubernetes/cert/expired.md

@@ -0,0 +1,32 @@
+# kubernetes 集群证书过期处理
+
+## 查看证书到期时间
+
+```bash
+kubeadm alpha certs check-expiration
+```
+
+## 修改时间使证书暂时有效
+
+```bash
+date -s '0000-00-00'
+```
+
+## 重新分发证书
+
+```bash
+kubeadm alpha certs renew all
+```
+
+## 重启服务，重载证书
+
+```bash
+docker ps | grep -v pause | grep -E "etcd|scheduler|controller|apiserver" | awk '{print $1}' | awk '{print "docker","restart",$1}' | bash
+ntpdate pool.ntp.org
+```
+
+## 更新用户配置
+
+```bash
+cp /etc/kubernetes/admin.conf ~/.kube/config
+```

kubernetes/cert/readme.md

@@ -0,0 +1 @@
+# kuberntes 集群证书相关问题

kubernetes/client-go/main.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"context"
+	"log"
+	"os"
+	"path/filepath"
+
+	appsv1 "k8s.io/api/apps/v1"
+	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/client-go/kubernetes"
+	"k8s.io/client-go/tools/clientcmd"
+)
+
+func homeDir() string {
+	if h := os.Getenv("HOME"); h != "" {
+		return h
+	}
+	return os.Getenv("USERPROFILE") // windows
+}
+
+func connectCluster() (*kubernetes.Clientset, error) {
+	conf := filepath.Join(homeDir(), ".kube", "config")
+	config, err := clientcmd.BuildConfigFromFlags("", conf)
+	if err != nil {
+		return nil, err
+	} 
+	clientset, err := kubernetes.NewForConfig(config)
+	return clientset, err
+}
+
+func getDeployment(client *kubernetes.Clientset, namespace, name string) (*appsv1.Deployment, error) {
+	dp, err := client.AppsV1().Deployments(namespace).Get(context.Background(), name, v1.GetOptions{})
+	return dp, err
+}
+
+func main() {
+	client, err := connectCluster()
+	if err != nil {
+		log.Fatal(err)
+	}
+	dp, err := getDeployment(client, "server", "code-bing")
+	if err != nil {
+		log.Fatal(err)
+	}
+	for _, c := range dp.Spec.Template.Spec.Containers {
+		log.Println(c.Name, c.Image)
+	}
+}

kubernetes/client-go/readme.md

@@ -0,0 +1,4 @@
+# 开发kubernetes管理工具
+
+开发kubernetes管理工具要用到`client-go`([Github](https://github.com/kubernetes/client-go))包
+

kubernetes/custom_resources/readme.md

@@ -0,0 +1,427 @@
+# 定制Kubernetes资源
+
+[定制资源(Custom Resource)](https://kubernetes.io/zh/docs/concepts/extend-kubernetes/api-extension/custom-resources/) 是对 Kubernetes API 的扩展，可以开发定制的资源及控制器，这些资源仍旧可以通过kubernetes api来访问。
+
+可以单独开发定制资源，也可以连定制同控制器一起开发。
+
+## 准备
+
+开发定制资源(CRD)需要安装controller-gen、kubebuilder、kustomize这三个工具。
+
+***这里所有工具都默认安装到`${HOME}/go/bin/`***
+
+### controller-gen
+
+[controller-gen](https://github.com/kubernetes-sigs/controller-tools) 用于生成crd controller的基础代码, 省去不少工作。
+
+安装
+
+```bash
+git clone https://github.com/kubernetes-sigs/controller-tools.git
+cd controller-tools/cmd/controller-gen/
+go build -o ${HOME}/go/bin/controller-gen main.go
+```
+
+使用方法
+
+```bash
+# controller-gen crd --paths=[api code path]/... output:dir=[output dir]
+controller-gen crd --paths=/git/demo/api/... output:dir=/git/demo/crd
+```
+
+### kubebuilder
+
+[kubebuilder](https://github.com/kubernetes-sigs/kubebuilder)用于生成crd基础代码。
+
+安装
+
+```bash
+wget https://github.com/kubernetes-sigs/kubebuilder/releases/download/v3.2.0/kubebuilder_linux_amd64 -O ${HOME}/go/bin/kubebuilder
+chmod +x ${HOME}/go/bin/kubebuilder
+
+```
+方法2
+
+```bash
+curl -L -o kubebuilder https://go.kubebuilder.io/dl/latest/$(go env GOOS)/$(go env GOARCH)
+chmod +x kubebuilder && mv kubebuilder /usr/local/bin/
+```
+
+#### 使用方法
+
+kubebuilder详细使用方法参见[官方文档](https://book.kubebuilder.io/)
+
+创建一个项目
+
+```bash
+mkdir $GOPATH/src/example
+cd $GOPATH/src/example
+kubebuilder init --domain project.demo.io
+```
+
+创建一个api资源
+
+```bash
+kubebuilder create api --group project.demo.io --version v1 --kind Demo
+```
+
+***这个api资源就是project.demo.io/v1/demos***
+
+### kustomize
+
+[kustomize](https://github.com/kubernetes-sigs/kustomize)把简明的kustomization 模板转换成kubernetes的资源配置。kustomize 可以用于crd也可以用于内置资源(参见文档[manage-kubernetes-objects](https://kubernetes.io/zh/docs/tasks/manage-kubernetes-objects/kustomization/))的管理。
+
+安装
+
+```bash
+go get sigs.k8s.io/kustomize/kustomize/v3
+```
+
+使用方法参见[官方指南](https://kubectl.docs.kubernetes.io/zh/guides)
+
+## 开始
+
+安装好相关工具之后，就可以开始愉快的玩耍了。
+
+### 初始化项目
+
+```bash
+PROJECT_DIR=demo #
+API_DOMAIN=demo
+GO_MODULE_DOMAIN=crd.io
+OWNER=bing
+mkdir ${PROJECT_DIR}
+cd ${PROJECT_DIR}
+kubebuilder init --plugins go/v3 --domain ${API_DOMAIN} --owner ${OWNER} --repo ${GO_MODULE_DOMAIN} --skip-go-version-check
+```
+
+- `PROJECT_DIR` 是项目目录
+- `GO_MODULE_DOMAIN` 是go mod 的名称， 也是api resource group的后缀，如果使用GOPATH则不需要配置
+- `API_DOMAIN` 是api resource的域名，也是group名的一部分
+- `OWNER` 是项目所有人
+
+***最终`apiVersion:${API_DOMAIN}.${GO_MODULE_DOMAIN}`***
+
+现在，`PROJECT_DIR` 目录下文件(夹)如下
+
+```bash
+config  Dockerfile  go.mod  go.sum  hack  main.go  Makefile  PROJECT
+```
+
+- `config` 存放kustomization配置
+- `Dockerfile` 生产docker镜像的配置，这个文件包含了代码编译操作
+- `hack` 这个文件夹存放了一个名为`boilerplate.go.txt`的文件
+- `main.go` 程序入口文件,启动一个manager，负责管理crd
+- `Makefile` `make`命令的配置文件
+- `PROJECT` 项目配置文件
+
+#### main.go
+
+main.go 是manager启动的入口文件。
+
+##### 处理启动参数
+
+```go
+flag.StringVar(&metricsAddr, "metrics-bind-address", ":8080", "The address the metric endpoint binds to.")
+flag.StringVar(&probeAddr, "health-probe-bind-address", ":8081", "The address the probe endpoint binds to.")
+flag.BoolVar(&enableLeaderElection, "leader-elect", false,
+        "Enable leader election for controller manager. "+
+                "Enabling this will ensure there is only one active controller manager.")
+opts := zap.Options{
+        Development: true,
+}
+opts.BindFlags(flag.CommandLine)
+flag.Parse()
+```
+
+##### 创建manager
+
+创建了一个manager `mgr`
+
+```go
+mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
+    Scheme:                 scheme,
+    MetricsBindAddress:     metricsAddr,
+    Port:                   9443,
+    HealthProbeBindAddress: probeAddr,
+    LeaderElection:         enableLeaderElection,
+    LeaderElectionID:       "e71592d6.demo",
+})
+```
+
+##### 为manager添加healthy和ready检查
+
+```go
+//+kubebuilder:scaffold:builder
+
+if err := mgr.AddHealthzCheck("healthz", healthz.Ping); err != nil {
+        setupLog.Error(err, "unable to set up health check")
+        os.Exit(1)
+}
+if err := mgr.AddReadyzCheck("readyz", healthz.Ping); err != nil {
+        setupLog.Error(err, "unable to set up ready check")
+        os.Exit(1)
+}
+```
+
+***注意：注释`//+kubebuilder:scaffold:builder`也是代码的一部分。所有`//+kubebuilder:开头的注释都有他的特殊意义。***
+
+##### 启动manager
+
+```go
+if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
+        setupLog.Error(err, "problem running manager")
+        os.Exit(1)
+}
+```
+
+### 创建一个CRD
+
+```bash
+kubebuilder create api --group ${API_DOMAIN} --version v1 --kind Demo
+```
+
+***创建时会询问是否创建resource及controller***
+
+现在项目目录下多了几个文件夹
+
+```bash
+api  bin  config  controllers  Dockerfile  go.mod  go.sum  hack  main.go  Makefile  PROJECT
+```
+
+- `api` api resource 的代码目录，目录下是版本子目录，resource的代码文件位于版本子目录内
+
+- `bin` `controller-gen` 可执行文件位于此处
+
+- `controllers` controller的代码目录
+
+#### main.go
+
+看一下main.go的新增部分
+
+```go
+if err = (&controllers.DemoReconciler{
+    Client: mgr.GetClient(),
+    Log:    ctrl.Log.WithName("controllers").WithName("Demo"),
+    Scheme: mgr.GetScheme(),
+}).SetupWithManager(mgr); err != nil {
+    setupLog.Error(err, "unable to create controller", "controller", "Demo")
+    os.Exit(1)
+}
+```
+创建一个对应的controller对象(`DemoReconciler`), 并设置这个controller的manager为`mgr`
+
+#### `api/v1/demo_types.go`
+
+定义Demo资源规约`DemoSpec`, 
+
+```go
+type DemoSpec struct {
+        // INSERT ADDITIONAL SPEC FIELDS - desired state of cluster
+        // Important: Run "make" to regenerate code after modifying this file
+
+        // Foo is an example field of Demo. Edit demo_types.go to remove/update
+        Foo string `json:"foo,omitempty"`
+}
+```
+
+定义Demo状态
+
+```go
+type DemoStatus struct {
+        // INSERT ADDITIONAL STATUS FIELD - define observed state of cluster
+        // Important: Run "make" to regenerate code after modifying this file
+}
+```
+
+注册资源
+
+```go
+func init() {
+    SchemeBuilder.Register(&Demo{}, &DemoList{})
+}
+```
+
+#### `api/v1/groupversion_info.go`
+
+api 资源组配置。
+
+```go
+// Package v1 contains API Schema definitions for the demo.io v1 API group
+//+kubebuilder:object:generate=true
+//+groupName=demo.crd.io
+package v1
+
+import (
+        "k8s.io/apimachinery/pkg/runtime/schema"
+        "sigs.k8s.io/controller-runtime/pkg/scheme"
+)
+
+var (
+        // GroupVersion is group version used to register these objects
+        GroupVersion = schema.GroupVersion{Group: "demo.crd.io", Version: "v1"}
+
+        // SchemeBuilder is used to add go types to the GroupVersionKind scheme
+        SchemeBuilder = &scheme.Builder{GroupVersion: GroupVersion}
+
+        // AddToScheme adds the types in this group-version to the given scheme.
+        AddToScheme = SchemeBuilder.AddToScheme
+)
+```
+
+***注意：注释`+groupName=demo.crd.io`不可删除，与`+kubebuilder:object:generate=true`一样，有他的特殊意义。后续还能看到用于设定的很多注释***
+
+#### `api/v1/zz_generated.deepcopy.go`
+
+这是一个自动生成的深度复制的文件，不要随意修改此文件，除非明确知道要做什么。kubebuilder会自动配置及更新该文件。
+
+#### `controllers/demo_controller.go`
+
+资源demo的控制器文件。
+
+##### DemoReconciler
+
+`DemoReconciler`对象定义。一般来说，无需为其添加任何内容，除非有特别需求
+
+```go
+
+// DemoReconciler reconciles a Demo object
+type DemoReconciler struct {
+    client.Client
+    Log    logr.Logger
+    Scheme *runtime.Scheme
+}
+```
+- `DemoReconciler`对象有三个成员，`client.Client` 是kubernetes client接口，提供如Get、Update、Create、Delete等方法。
+
+- `Log` 统一的log处理
+
+- `Scheme` 这个功能比较多，比如序列化与反序列化对象
+
+##### Reconcile
+
+处理程序。每一次CRD的变更都会调用此方法。
+
+```go
+
+//+kubebuilder:rbac:groups=demo.demo,resources=demoes,verbs=get;list;watch;create;update;patch;delete
+//+kubebuilder:rbac:groups=demo.demo,resources=demoes/status,verbs=get;update;patch
+//+kubebuilder:rbac:groups=demo.demo,resources=demoes/finalizers,verbs=update
+
+func (r *DemoReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
+        _ = r.Log.WithValues("demo", req.NamespacedName)
+
+        // your logic here
+
+        return ctrl.Result{}, nil
+}
+```
+
+***注意：`+kubebuilder:rbac`是用于授权的注释，只有在此授权了的资源，才能够使用对应权限访问。`kustomize`会依据此配置生成`config/rbac`配置。***
+
+##### SetupWithManager
+
+设置controller的manager，通常不需要修改这部分代码就可以正常工作，但有时需要进行改动，比如watch其他资源的时候。
+
+```go
+// SetupWithManager sets up the controller with the Manager.
+func (r *DemoReconciler) SetupWithManager(mgr ctrl.Manager) error {
+    return ctrl.NewControllerManagedBy(mgr).
+        For(&demov1.Demo{}).
+        Complete(r)
+}
+```
+
+### 为controller添加功能
+
+#### 添加字段
+
+首先为crd添加两个字段。一个规约字段`Bar`和一个状态字段`UpdatedAt`
+
+```go
+type DemoSpec struct {
+    Foo string `json:"foo,omitempty"`
+    Bar string `json:"Bar,omitempty"`
+}
+
+// DemoStatus defines the observed state of Demo
+type DemoStatus struct {
+    UpdatedAt *metav1.Time `json:"UpdatedAt,omitempty"`
+}
+
+```
+
+#### 修改Reconcile
+
+```go
+import apiv1 "demo.crd.io/api/v1"
+
+func (r *DemoReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
+        _ = r.Log.WithValues("demo", req.NamespacedName)
+
+        // your logic here
+        demo := apiv1.Demo{}
+        err := r.Get(context.Background(), req.NamespacedName, &demo)
+        if err != nil {
+            r.Log.Error(err, "get demo resource error")
+            return ctrl.Result{}, nil
+        }
+        //更新操作
+        if demo.ObjectMeta.DeletionTimestamp.IsZero() {
+            //更新
+            err = r.processUpdate(&demo)
+        }
+        return ctrl.Result{}, nil
+}
+
+//处理更新
+func (r *DemoReconciler)processUpdate(demo *apiv1.Demo)error{
+    r.Log.Info("the bar of %s is %s", demo.GetName(), demo.Spec.Bar)
+    now := metav1.Now()
+    demo.Status.UpdatedAt = &now
+    err := r.Status().Update(context.Background(), demo)
+    return err
+}
+```
+
+这里首先获取到触发此次reconcile的对象`demo`, 然后通过`demo.ObjectMeta.DeletionTimestamp.IsZero()`来判断是删除操作还是更新操作(创建对象也是更新操作)。对于更新操作，执行方法`processUpdate`
+
+在`processUpdate`中，先将`demo.Spec.Bar`打印到日志:`r.Log.Info("the bar of %s is %s", demo.GetName(), demo.Spec.Bar)`， 之后更新`demo.Status.UpdatedAt`字段。
+
+这里使用了`r.Status().Update(context.Background(), demo)`，这需要有注释`// +kubebuilder:subresource:status` 默认已经添加了该注释，如果误删除了，需要添加上。
+
+```go
+//+kubebuilder:object:root=true
+//+kubebuilder:subresource:status
+
+// Demo is the Schema for the demoes API
+type Demo struct {
+```
+
+**注意这里注释的位置和空行。**
+
+### 多group
+
+初始化
+
+```bash
+PROJECT_DIR=demo #
+GO_MODULE_DOMAIN=crd.io
+OWNER=bing
+CRD_VERSION=v1beta1
+
+
+echo "init crd env"
+kubebuilder init --plugins go/v3 --owner ${OWNER} --repo ${GO_MODULE_DOMAIN} --skip-go-version-check
+echo "open multi group..."
+kubebuilder edit --multigroup
+```
+
+`kubebuilder edit --multigroup` 开启多组支持
+
+创建CRD
+
+```bash
+kubebuilder create api --group group1 --version ${CRD_VERSION} --kind Demo --crd-version ${CRD_VERSION} --controller --resource
+kubebuilder create api --group group2 --version ${CRD_VERSION} --kind Demo --crd-version ${CRD_VERSION} --controller --resource
+```

kubernetes/extend/extend-node-resource.md

@@ -0,0 +1,109 @@
+# 为节点添加扩展资源
+
+## 启用apiserver代理
+
+启用apiserver代理，以便发送请求
+
+```bash
+kubectl proxy
+```
+
+## 添加扩展资源
+
+```bash
+export NODE=k8snode1
+curl --header "Content-Type: application/json-patch+json" \
+  --request PATCH \
+  --data '[{"op": "add", "path": "/status/capacity/bing89.com~1demo", "value": "4"}]' \
+  http://localhost:8001/api/v1/nodes/${NODE}/status
+```
+
+输出显示该节点的当前资源容量
+
+```json
+"capacity": {
+    "bing89.com/demo": "4",
+    "cpu": "2",
+    "ephemeral-storage": "17394Mi",
+    "hugepages-2Mi": "0",
+    "memory": "4045168Ki",
+    "pods": "110"
+}
+```
+
+显示节点信息
+
+```bash
+kubectl describe node ${NODE}
+```
+
+输出
+
+```bash
+Capacity:
+  bing89.com/demo:    4
+  cpu:                2
+  ephemeral-storage:  17394Mi
+  hugepages-2Mi:      0
+  memory:             4045168Ki
+  pods:               110
+```
+
+## 测试
+
+创建一个申请demo资源的[pod](../apiresources/yaml/pod/demo-extend-resouce.yaml)
+
+```yaml
+apiVersion: v1
+kind: Pod
+metadata:
+  name: demo-extend-resource
+spec:
+  containers:
+  - name: demo-extend-resource
+    image: registry.bing89.com/tools/demo:1.0
+    ports:
+    - containerPort: 8080
+      name: http-port
+    resources:
+      requests:
+        cpu: 50m
+        bing89.com/demo: 1
+      limits:
+        cpu: 100m
+        bing89.com/demo: 1
+  restartPolicy: OnFailure
+```
+
+```bash
+kubectl -n mem-demo apply -f kubernetes/apiresources/yaml/pod/demo-extend-resouce.yaml
+```
+
+查看pod
+
+```bash
+kubectl -n mem-demo get pod -o wide
+```
+
+现在，pod已经被分配到有资源的`${NODE}(k8snode1)`
+
+```bash
+NAME                   READY   STATUS    RESTARTS   AGE    IP              NODE       NOMINATED NODE   READINESS GATES
+demo                   1/1     Running   0          2d1h   172.16.98.195   k8snode3   <none>           <none>
+demo-extend-resource   1/1     Running   0          25s    172.16.249.5    k8snode1   <none>           <none>
+```
+
+## 清理扩展资源
+
+```bash
+curl --header "Content-Type: application/json-patch+json" \
+--request PATCH \
+--data '[{"op": "remove", "path": "/status/capacity/bing89.com~1demo"}]' \
+http://localhost:8001/api/v1/nodes/${NODE}/status
+```
+
+验证是否已经被移除
+
+```bash
+kubectl describe node ${NODE} | grep demo
+```

kubernetes/extend/readme.md

@@ -0,0 +1 @@
+# kubernetes 扩展

kubernetes/installation/config_run_env.md

@@ -0,0 +1,231 @@
+# 配置运行环境
+
+## 升级内核
+
+由于centos内核实在太老旧，需要升级系统内核。
+
+```bash
+rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
+rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-4.el7.elrepo.noarch.rpm
+yum --enablerepo=elrepo-kernel install kernel-lt -y
+sed -i s/saved/0/g /etc/default/grub
+grub2-set-default "$(cat /boot/efi/EFI/centos/grub.cfg |grep menuentry|grep 'menuentry '|head -n 1|awk -F "'" '{print $2}')"
+#查看默认启动版本
+grub2-editenv list
+grub2-mkconfig -o /boot/efi/EFI/centos/grub.cfg && reboot
+
+```
+
+***注意：这里默认升级到最新版本的linux内核， 也可以自行指定内核版本。不升级也能够运行kubernetes***
+
+## 配置selinux
+
+```bash
+sed -i 's/SELINUX=enforcing/SELINUX=permissive/' /etc/selinux/config
+setenforce 0
+```
+
+***也可完全关闭selinux(`sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config`)，但并不推荐。***
+
+## 配置防火墙
+
+为kubernetes创建一个zone
+
+```bash
+firewall-cmd --zone=public --new-service=kubernetes --permanent
+#source是源ip
+firewall-cmd --zone=public --service=kubernetes --add-source=192.168.0.0/24
+```
+
+kubernetes 使用下表所述端口：
+
+**控制节点**
+
+协议|方向|端口范围|作用|使用者
+--|--|--|--|--
+TCP|入站|6443*|Kubernetes API 服务器|所有组件
+TCP|入站|10250|Kubelet API|kubelet 自身、Control plane
+TCP|入站|10251|kube-scheduler|kube-scheduler 自身
+TCP|入站|10252|kube-controller-manager|kube-controller-manager 自身
+
+```bash
+firewall-cmd --zone=public --service=kubernetes --add-port=6443/tcp --permanent
+firewall-cmd --zone=public --service=kubernetes --add-port=10250/tcp --permanent
+firewall-cmd --zone=public --service=kubernetes --add-port=10251/tcp --permanent
+firewall-cmd --zone=public --service=kubernetes --add-port=10252/tcp --permanent
+```
+
+**工作节点**
+
+协议|方向|端口范围|作用|使用者
+--|--|--|--|--
+TCP|入站|10250|Kubelet API|kubelet 自身、控制平面组件
+TCP|入站|30000-32767|NodePort 服务**|所有组件
+
+```bash
+firewall-cmd --zone=public --new-service=kubernetes --permanent
+#source是源ip
+firewall-cmd --zone=public --service=kubernetes --add-source=192.168.0.0/24
+
+firewall-cmd --zone=public --service=kubernetes --add-port=10250/tcp --permanent
+```
+
+**etcd节点**
+
+协议|方向|端口范围|作用|使用者
+--|--|--|--|--
+TCP|入站|2379-2380|etcd server client API|kube-apiserver, etcd
+
+```bash
+firewall-cmd --zone=public --new-service=kubernetes --permanent
+#source是源ip
+firewall-cmd --zone=public --service=kubernetes --add-source=192.168.0.0/24
+
+firewall-cmd --zone=public --service=kubernetes --add-port=2379/tcp --permanent
+firewall-cmd --zone=public --service=kubernetes --add-port=2380/tcp --permanent
+```
+
+**添加service到zone**
+
+```bash
+firewall-cmd --zone=public --add-service=kubernetes --permanent
+```
+
+**重新加载配置**
+
+***确保每一步操作都加了参数`--permanent`持久化配置***
+
+```bash
+firewall-cmd --reload
+```
+
+**查看防火墙配置**
+
+```bash
+firewall-cmd --zone=kubernetes --list-all
+```
+
+应该可以看到输出
+
+```bash
+kubernetes (active)
+  target: default
+  icmp-block-inversion: no
+  interfaces: enp4s0
+  sources: 192.168.0.0/24 10.244.0.0/16
+  services:
+  ports: 6443/tcp 10250/tcp 10251/tcp 10252/tcp
+  protocols:
+  masquerade: no
+  forward-ports:
+  source-ports:
+  icmp-blocks:
+  rich rules:
+```
+
+***也可完全关闭防火墙(`systemctl disable --now firewalld`)，但并不推荐***
+
+## 关闭swap
+
+```bash
+swapoff -a && sysctl -w vm.swappiness=0
+#/etc/fstab中swap相关的需要删除，否则会导致重启时kubelet启动失败
+sed -i 's|\(^/dev/mapper/.*-swap.*\)|#\1|' /etc/fstab
+```
+
+## 配置系统参数
+
+配置完成后需要重启
+
+```bash
+cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf
+overlay
+br_netfilter
+EOF
+
+iptables -P FORWARD ACCEPT
+cat <<EOF >  /etc/sysctl.d/k8s.conf
+net.bridge.bridge-nf-call-ip6tables=1
+net.bridge.bridge-nf-call-iptables=1
+vm.swappiness=0
+net.ipv4.ip_forward=1
+EOF
+sysctl --system
+#添加，rockylinux8.5 + k8s1.22.4
+echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables
+```
+
+## 配置hosts
+
+```bash
+cat <<EOF >>/etc/hosts
+#私有仓库地址
+192.168.0.248 registry.bing89.com
+#kubernetes cluster nodes
+192.168.0.201 k8smaster1
+192.168.0.202 k8smaster2
+192.168.0.203 k8smaster3
+192.168.0.211 k8snode1
+192.168.0.212 k8snode2
+192.168.0.213 k8snode3
+192.168.0.221 etcd1
+192.168.0.222 etcd2
+192.168.0.223 etcd3
+EOF
+```
+
+## 配置ssh免密登录
+
+***若不进行此配置，可能需要频繁输入密码***
+
+```bash
+HOSTS=(k8smaster1 k8smaster2 k8smaster3 k8snode1 k8snode2 k8snode3)
+ssh-keygen
+for host in ${HOSTS[@]};do ssh-copyid ${host}; done
+```
+
+## 安装tc
+
+***不安装可能会出现`[WARNING FileExisting-tc]: tc not found in system path`***
+
+```bash
+yum install iproute-tc
+```
+
+## 配置ipvs内核模块
+
+***如果不安装高可用集群，可以不配置***
+
+```bash
+cat >>/etc/profile<<EOF
+modprobe ip_vs
+modprobe ip_vs_rr
+modprobe ip_vs_wrr
+modprobe ip_vs_sh
+modprobe nf_conntrack
+EOF
+source /etc/profile
+```
+
+## 安装软件包
+
+由于kubernetes已经放弃了docker兼容，这里是用containerd的内置cri插件作为容器运行时(CRI).
+
+### 安装containerd
+
+参见[安装containerd](containerd.md)
+
+### 安装kubelet,kubeadm,kubectl
+
+```bash
+cat <<EOF > /etc/yum.repos.d/kubernetes.repo
+[kubernetes]
+name=Kubernetes
+baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
+enabled=1
+gpgcheck=1
+repo_gpgcheck=1
+gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
+EOF
+yum install -y kubelet kubeadm kubectl
+```

kubernetes/installation/containerd.md

@@ -0,0 +1,133 @@
+# Containerd 安装配置与管理
+
+使用[containerd](https://github.com/containerd/cri)的内置CRI插件作为kubernetes CRI
+
+***注意：本文档仅在1.4.x版本上测试通过***
+
+## 安装
+
+```bash
+#使用aliyun的docker-ce镜像源，方便快速安装最新版containerd
+yum install -y yum-utils device-mapper-persistent-data lvm2 wget
+wget -O /etc/yum.repos.d/docker-ce.repo https://download.docker.com/linux/centos/docker-ce.repo
+sed -i 's+download.docker.com+mirrors.tuna.tsinghua.edu.cn/docker-ce+' /etc/yum.repos.d/docker-ce.repo
+yum makecache fast
+yum install -y containerd.io
+```
+
+
+## 配置
+
+containerd 的配置文件位于`/etc/containerd/config.toml`，若系统种还没有这个文件，执行以下命令生成
+
+```bash
+sudo mkdir -p /etc/containerd
+containerd config default | sudo tee /etc/containerd/config.toml
+```
+
+### 配置 cri
+
+1. cgroup driver 为systemd
+
+2. sandbox image为私有仓库镜像
+
+3. 私有镜像仓库不验证证书
+
+```bash
+[plugins]
+  [plugins."io.containerd.grpc.v1.cri"]
+    sandbox_image = "registry.bing89.com/kubernetes/pause:3.2"
+    #systemd_cgroup = true 似乎不起作用
+    [plugins."io.containerd.grpc.v1.cri".containerd]
+      [plugins."io.containerd.grpc.v1.cri".containerd.runtimes]
+        [plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc]
+          [plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc.options]
+            SystemdCgroup = true
+```
+```bash
+[plugins]
+  [plugins."io.containerd.grpc.v1.cri"]
+    [plugins."io.containerd.grpc.v1.cri".registry]
+      [plugins."io.containerd.grpc.v1.cri".registry.mirrors]
+        [plugins."io.containerd.grpc.v1.cri".registry.mirrors."docker.io"]
+          endpoint = ["https://pqbap4ya.mirror.aliyuncs.com"]
+        [plugins."io.containerd.grpc.v1.cri".registry.mirrors."registry.bing89.com"]
+          endpoint = ["https://registry.bing89.com"]
+      [plugins."io.containerd.grpc.v1.cri".registry.configs]
+        [plugins."io.containerd.grpc.v1.cri".registry.configs."registry.bing89.com".tls]
+          insecure_skip_verify = true
+        [plugins."io.containerd.grpc.v1.cri".registry.configs."registry.bing89.com".auth]
+          username = "xxxx"
+          password = "xxxx"
+```
+### 配置cni
+
+创建网桥
+
+```bash
+cat <<EOF >/etc/sysconfig/network-scripts/ifcfg-brcontainerd0
+TYPE="Bridge"
+UUID="ba72d9bd-9be9-4a87-a587-ee9e070052d2"
+DEVICE="brcontainer0"
+ONBOOT="yes"
+BOOTPROTO="none"
+EOF
+#重启network
+systemctl restart network
+#used in rockylinux 8.5
+nmcli connection reload
+```
+
+添加cni网络配置
+
+```bash
+mkdir /etc/cni/net.d -p
+cat <<EOF >/etc/cni/net.d/172-my.conf
+{
+    "cniVersion": "0.2.0",
+    "name": "mynet",
+    "type": "bridge",
+    "bridge": "brcontainer0",
+    "isGateway": true,
+    "ipMasq": true,
+    "ipam": {
+        "type": "host-local",
+        "subnet": "172.17.0.0/16",
+        "routes": [
+            { "dst": "0.0.0.0/0" }
+        ],
+     "dataDir": "/run/ipam-state"
+    },
+    "dns": {
+      "nameservers": [ "223.5.5.5", "223.6.6.6", "114.114.114.114" ]
+    }
+}
+EOF
+```
+### 应用配置
+
+重启containerd使配置生效
+
+```bash
+systemctl daemon-reload && systemctl restart containerd
+```
+
+### 配置critrl
+
+crictl是containerd的管理工具，类似于docker-client
+
+```bash
+cat <<EOF >/etc/crictl.yaml
+runtime-endpoint: unix:///run/containerd/containerd.sock
+image-endpoint: unix:///run/containerd/containerd.sock
+timeout: 10
+debug: false
+EOF
+```
+
+## 使用ctr运行一个容器
+
+```bash
+ctr run --mount type=bind,src=/etc/nginx/nginx.conf,dst=/etc/nginx/nginx.conf,options=rbind:ro --mount type=bind,src=/etc/nginx/conf.d,dst=/etc/nginx/conf.d,options=rbind:ro --memory-limit 1024000000 --net-host -d docker.io/library/nginx:1.9 nginx
+
+```

kubernetes/installation/crictl.md

@@ -0,0 +1,155 @@
+# crictl
+crictl 是一个开源的container runtime 管理工具。
+
+## 安装crictl
+
+crictl是kubeadmin的依赖包，安装kubeadm会自动安装cri-tools包
+
+也可以安装指定版本
+
+```bash
+VERSION="v1.20.0"
+wget https://github.com/kubernetes-sigs/cri-tools/releases/download/$VERSION/crictl-$VERSION-linux-amd64.tar.gz
+sudo tar zxvf crictl-$VERSION-linux-amd64.tar.gz -C /usr/local/bin
+rm -f crictl-$VERSION-linux-amd64.tar.gz
+```
+
+***21-12-09更新，crictl 工具 1.19版(k8s1.23)已经无法兼容containerd 1.4，Redhat8库里面的是1.4无法正常使用，需要安装1.5版本***
+
+## 配置crictl
+
+配置文件位于`/etc/crictl.yaml`
+
+docker
+
+```bash
+runtime-endpoint: unix:///var/run/dockershim.sock
+image-endpoint: unix:///var/run/dockershim.sock
+timeout: 2
+debug: true
+pull-image-on-create: false
+```
+
+containerd
+
+```bash
+cat <<EOF >/etc/crictl.yaml
+runtime-endpoint: unix:///run/containerd/containerd.sock
+image-endpoint: unix:///run/containerd/containerd.sock
+timeout: 10
+debug: false
+EOF
+```
+
+## 创建pod
+
+编写pod配置,需要两个json文件或两个yaml文件
+
+pod.json
+
+```json
+{
+    "metadata": {
+        "name": "nginx-sandbox",
+        "namespace": "default",
+        "attempt": 1,
+        "uid": "hdishd83djaidwnduwk28bcsb"
+    },
+    "log_directory": "/tmp",
+    "linux": {
+    }
+}
+```
+
+container.json
+
+```json
+{
+  "metadata": {
+      "name": "busybox"
+  },
+  "image":{
+      "image": "busybox"
+  },
+  "command": [
+      "top"
+  ],
+  "log_path":"busybox.0.log",
+  "linux": {
+  }
+}
+```
+pod.yaml
+
+```yaml
+metadata:
+  attempt: 1
+  name: busybox-sandbox
+  namespace: default
+  uid: hdishd83djaidwnduwk28bcsb
+log_directory: /tmp
+linux:
+  namespaces:
+    options: {}
+```
+
+container.yaml
+
+```yaml
+metadata:
+  name: busybox
+image:
+  image: busybox:latest
+command:
+- top
+log_path: busybox.0.log
+```
+
+执行命令
+
+```bash
+crictl runp container.json pod.json
+#crictl runp container.yaml pod.yaml
+```
+
+## nginx
+
+container.yaml
+
+```yaml
+metadata:
+  name: nginx
+image:
+  image: nginx:1.19
+log_path: nginx.0.log
+mounts:
+- container_path: /etc/nginx/nginx.conf
+  host_path: /etc/nginx/nginx.conf
+  readonly: true
+- container_path: /etc/nginx/conf.d
+  host_path: /etc/nginx/conf.d
+  readonly: true
+linux:
+  namespaces:
+    options: {}
+```
+
+pod.yaml
+
+```yaml
+metadata:
+  attempt: 1
+  name: nginx-pod
+  namespace: default
+log_directory: /tmp/nginx
+linux:
+  namespaces:
+    options: {}
+port_mappings:
+- host_port: 80
+  container_port: 80
+  host_ip: 0.0.0.0
+- host_port: 443
+  container_port: 443
+  host_ip: 0.0.0.0
+```

kubernetes/installation/install_cluster_with_outside_etcd.md

@@ -0,0 +1,141 @@
+# 使用kubeadm安装基于外部etcd集群的kubernetes
+
+安装之前，请确认已经按要求准备好正确数量的节点(最低6个，推荐9个)并已经根据[配置运行环境](config_run_env.md)完成了环境配置。
+
+**注意：本文档所有安装操作均在第一个controllplane节点完成**
+
+## 使用kubeadm安装配置外部etcd集群
+
+### 创建配置
+
+参照[kubeadm 配置示例](kubeadm_config_example.md)创建与准备好的节点符合的配置，每个节点都有各自的配置。配置创建好之后放置于`/tmp/${HOST_IP}`目录下
+
+### 创建证书
+
+需要为每个节点创建证书。
+
+重置当前节点，避免有未清理干净的以前安装的集群
+
+```bash
+kubeadm reset -f
+```
+
+生成证书颁发机构
+
+```bash
+kubeadm init phase certs etcd-ca
+```
+
+为每个节点创建证书
+
+```bash
+ETCD_HOSTS=(192.168.0.211 192.168.0.212 192.168.0.213)
+for HOST in ${ETCD_HOSTS[@]};
+do
+kubeadm init phase certs etcd-server --config=/tmp/${HOST}/etcdcfg.yaml
+kubeadm init phase certs etcd-peer --config=/tmp/${HOST}/etcdcfg.yaml
+kubeadm init phase certs etcd-healthcheck-client --config=/tmp/${HOST}/etcdcfg.yaml
+kubeadm init phase certs apiserver-etcd-client --config=/tmp/${HOST}/etcdcfg.yaml
+cp -R /etc/kubernetes/pki /tmp/${HOST}/
+# 清理不可重复使用的证书
+find /etc/kubernetes/pki -not -name ca.crt -not -name ca.key -type f -delete
+# 清理不应从此主机复制的证书
+find /tmp/${HOST} -name ca.key -type f -delete
+done
+```
+
+### 初始化etcd
+
+```bash
+scp -r /tmp/kubelet.service.d ${HOST}:/etc/systemd/system/
+scp -r /tmp/${HOST}/* ${HOST}:/tmp
+ssh ${HOST} "systemctl daemon-reload"
+ssh ${HOST} "kubeadm reset -f && rsync -ivhPr /tmp/pki /etc/kubernetes/"
+ssh ${HOST} "systemctl restart kubelet && kubeadm init phase etcd local --config=/tmp/etcdcfg.yaml"
+```
+
+### 验证安装
+
+```bash
+docker run --rm -it --net host -v /etc/kubernetes:/etc/kubernetes registry.bing89.com/kubernetes/etcd:3.4.13-0 etcdctl --cert /etc/kubernetes/pki/etcd/peer.crt --key /etc/kubernetes/pki/etcd/peer.key --cacert /etc/kubernetes/pki/etcd/ca.crt --endpoints https://192.168.0.211:2379 endpoint health --cluster
+```
+
+***如果没有安装docker，可能需要创建pod的json配置，并使用crictl(参考[Containerd 安装配置与管理](containerd.md))来验证***
+
+## 安装配置haproxy
+
+kubernetes可以使用keepalived、haproxy、kube-vip来实现apiserver的高可用，这里使用haproxy。
+
+参考[haproxy安装与配置](install_haproxy.md)完成haproxy的配置。
+
+## 初始化第一个ControlPlane节点
+
+### 创建controlplane节点配置
+
+参照[kubeadm 配置示例](kubeadm_config_example.md)创建与准备好的节点符合的配置，只需要一份配置。
+
+### 备份并重置节点
+
+```bash
+if [ -f /etc/kubernetes/manifests/haproxy.yaml ];then
+    cp /etc/kubernetes/manifests/haproxy.yaml /tmp/haproxy.yaml.backup
+fi
+if [ -f /etc/kubernetes/pki/ca.crt ];then
+    cp /etc/kubernetes/pki/ca.crt  /tmp/ca.crt.backup
+fi
+if [ -f /etc/kubernetes/pki/ca.key ];then
+    cp /etc/kubernetes/pki/ca.key /tmp/ca.key.backup
+fi
+kubeadm reset -f
+```
+
+### 复制etcd证书
+
+```bash
+ETCD_HOST1=192.168.0.211
+if [ ! -d /etc/kubernetes/pki/etcd]
+    mkdir /etc/kubernetes/pki/etcd
+fi
+scp /tmp/${ETCD_HOST1}/pki/etcd/ca.crt /etc/kubernetes/pki/etcd/ca.crt
+scp /tmp/${ETCD_HOST1}/pki/apiserver-etcd-client.crt /etc/kubernetes/pki/apiserver-etcd-client.crt
+scp /tmp/${ETCD_HOST1}/pki/apiserver-etcd-client.key /etc/kubernetes/pki/apiserver-etcd-client.key
+scp /tmp/ca.key /etc/kubernetes/pki/ca.key 
+scp /tmp/ca.crt /etc/kubernetes/pki/ca.crt 
+```
+
+### 初始化controlplane
+
+```bash
+kubeadm init --config /tmp/kubeadmcfg.yaml --upload-certs
+```
+
+### 还原haproxy 并重启kubelet
+
+```bash
+if [ -f /tmp/haproxy.yaml.backup ];then
+    cp /tmp/haproxy.yaml.backup /etc/kubernetes/manifests/haproxy.yaml
+    systemctl restart kubelet
+fi
+```
+
+## 加入其他controlplane节点
+
+备份并重置节点
+
+```bash
+if [ -f /etc/kubernetes/manifests/haproxy.yaml ];then
+    cp /etc/kubernetes/manifests/haproxy.yaml /tmp/haproxy.yaml.backup
+fi
+kubeadm reset -f
+```
+
+使用kubeadm join... 指令加入集群
+
+还原haproxy 并重启kubelet
+
+```
+if [ -f /tmp/haproxy.yaml.backup ];then
+    cp /tmp/haproxy.yaml.backup /etc/kubernetes/manifests/haproxy.yaml
+    systemctl restart kubelet
+fi
+```

kubernetes/installation/install_cluster_with_stacked_etcd.md

@@ -0,0 +1,62 @@
+# 使用kubeadm安装基于堆叠etcd的kubernetes
+
+安装之前，请确认已经按要求准备好正确数量的节点(最低3个，推荐6个)并已经根据[配置运行环境](config_run_env.md)完成了环境配置。
+
+## 安装配置haproxy
+
+kubernetes可以使用keepalived、haproxy、kube-vip来实现apiserver的高可用，这里使用haproxy。
+
+参考[haproxy安装与配置](install_haproxy.md)完成haproxy的配置。
+
+## 创建配置
+
+参照[kubeadm 配置示例](kubeadm_config_example.md)创建与准备好的节点符合的配置，每个节点都有各自的配置。配置创建好之后放置于`/tmp/${HOST_IP}`目录下
+
+## 初始化第一个controlplane
+
+备份并重置节点
+
+```bash
+if [ -f /etc/kubernetes/manifests/haproxy.yaml ];then
+    cp /etc/kubernetes/manifests/haproxy.yaml /tmp/haproxy.yaml.backup
+fi
+kubeadm reset -f
+```
+
+初始化controlplane
+
+```bash
+kubeadm init --config /tmp/kubeadmcfg.yaml
+```
+
+还原haproxy 并重启kubelet
+
+```bash
+if [ -f /tmp/haproxy.yaml.backup ];then
+    cp /tmp/haproxy.yaml.backup /etc/kubernetes/manifests/haproxy.yaml
+    systemctl restart kubelet
+fi
+```
+
+## 初始化其他节点
+
+备份并重置节点
+
+```bash
+if [ -f /etc/kubernetes/manifests/haproxy.yaml ];then
+    cp /etc/kubernetes/manifests/haproxy.yaml /tmp/haproxy.yaml.backup
+fi
+kubeadm reset -f
+```
+
+使用kubeadm join... 指令加入集群
+
+还原haproxy 并重启kubelet
+
+```bash
+if [ -f /tmp/haproxy.yaml.backup ];then
+    cp /tmp/haproxy.yaml.backup /etc/kubernetes/manifests/haproxy.yaml
+    systemctl restart kubelet
+fi
+```
+

kubernetes/installation/install_haproxy.md

@@ -0,0 +1,134 @@
+# haproxy安装与配置
+
+安装之前，请确认已经按要求准备好正确数量的节点并已经根据[配置运行环境](config_run_env.md)完成了环境配置。
+
+**若无特别说明，本文档所述操作，均在第一个controlplane节点上执行。**
+
+## 安装软件
+
+```bash
+export HA_HOSTS=(192.168.0.201 192.168.0.202 192.168.0.203)
+export VIP=192.168.0.200
+export HAPASSWORD="hapassword2020"
+export HOST_PREFIX="k8smaster"
+for HOST in ${HA_HOSTS[@]}
+do
+ssh ${HOST}  "yum install corosync pacemaker pcs fence-agents resource-agents -y && systemctl enable --now pcsd"
+done
+```
+
+## 创建VIP
+
+```bash
+for HOST in ${HA_HOSTS[@]}
+do
+    ssh ${HOST}  "echo ${HAPASSWORD} | passwd --stdin hacluster && pcs cluster auth -u hacluster -p ${HAPASSWORD} ${HA_HOSTS}"
+    ssh ${HOST}  "pcs cluster setup --start --name k8s_cluster ${HA_HOSTS}"
+    ssh ${HOST}  "pcs cluster enable --all && pcs cluster start  --all && pcs cluster status && pcs status corosync"
+    ssh ${HOST}  "pcs property set stonith-enabled=false && pcs property set no-quorum-policy=ignore && crm_verify -L -V"
+done
+ssh ${HA_HOSTS[0]}  "pcs resource create vip ocf:heartbeat:IPaddr2 ip=${VIP} cidr_netmask=28 op monitor interval=28s"
+```
+
+## 创建haproxy配置
+
+```bash
+#haproxy 配置
+cat <<EOF >/tmp/haproxy.cfg
+# /etc/haproxy/haproxy.cfg
+#---------------------------------------------------------------------
+# Global settings
+#---------------------------------------------------------------------
+global
+    log /dev/log local0
+    log /dev/log local1 notice
+    daemon
+
+#---------------------------------------------------------------------
+# common defaults that all the 'listen' and 'backend' sections will
+# use if not designated in their block
+#---------------------------------------------------------------------
+defaults
+    mode                    http
+    log                     global
+    option                  httplog
+    option                  dontlognull
+    option http-server-close
+    option forwardfor       except 127.0.0.0/8
+    option                  redispatch
+    retries                 1
+    timeout http-request    10s
+    timeout queue           20s
+    timeout connect         5s
+    timeout client          20s
+    timeout server          20s
+    timeout http-keep-alive 10s
+    timeout check           10s
+
+#---------------------------------------------------------------------
+# apiserver frontend which proxys to the masters
+#---------------------------------------------------------------------
+frontend apiserver
+    bind *:8443
+    mode tcp
+    option tcplog
+    default_backend apiserver
+
+#---------------------------------------------------------------------
+# round robin balancing for apiserver
+#---------------------------------------------------------------------
+backend apiserver
+    option httpchk GET /healthz
+    http-check expect status 200
+    mode tcp
+    option ssl-hello-chk
+    balance     roundrobin
+EOF
+INDEX=0
+for HOST in ${HA_HOSTS[@]}
+do
+    echo "        server ${HOST} ${HOST_PREFIX}${INDEX}:6443 weight 1 maxconn 1000 check inter 2000 rise 2 fall 3\n" >> /tmp/haproxy.cfg
+    INDEX=$(expr ${INDEX} + 1)
+done
+#haproxy pod配置
+cat <<EOF >/tmp/haproxy.yaml
+apiVersion: v1
+kind: Pod
+metadata:
+  name: haproxy
+  namespace: kube-system
+spec:
+  containers:
+  - image: registry.bing89.com/dockerhub/haproxy:lts-alpine
+    name: haproxy
+    livenessProbe:
+      failureThreshold: 8
+      httpGet:
+        host: localhost
+        path: /healthz
+        port: 8443
+        scheme: HTTPS
+    volumeMounts:
+    - mountPath: /usr/local/etc/haproxy/haproxy.cfg
+      name: haproxyconf
+      readOnly: true
+  hostNetwork: true
+  volumes:
+  - hostPath:
+      path: /etc/haproxy/haproxy.cfg
+      type: FileOrCreate
+    name: haproxyconf
+EOF
+```
+
+## 配置并启动haproxy
+
+```bash
+    for HOST in ${HA_HOSTS[@]}
+    do
+        ssh ${HOST} "if [ ! -d /etc/haproxy ];then mkdir /etc/haproxy; fi"
+        scp /tmp/haproxy.cfg ${HOST}:/etc/haproxy/haproxy.cfg
+        scp /tmp/haproxy.yaml  ${HOST}:/etc/kubernetes/manifests/haproxy.yaml
+        ssh ${HOST} "systemctl restart kubelet"
+    done
+```

kubernetes/installation/kubeadm_config_example.md

@@ -0,0 +1,101 @@
+# kubeadm 配置示例
+
+## 单ControlPlane节点
+
+```yaml
+# 配置kubelet使用systemd作为cgroups驱动
+apiVersion: kubelet.config.k8s.io/v1beta1
+kind: KubeletConfiguration
+cgroupDriver: systemd
+---
+apiVersion: kubeadm.k8s.io/v1beta2
+kind: ClusterConfiguration
+kubernetesVersion: stable
+controlPlaneEndpoint: "192.168.0.200:8443"
+imageRepository: registry.bing89.com/kubernetes
+networking:
+  podSubnet: 10.244.0.0/16
+```
+
+## 基于堆叠etcd的cluster
+
+```yaml
+# 配置kubelet使用systemd作为cgroups驱动
+apiVersion: kubelet.config.k8s.io/v1beta1
+kind: KubeletConfiguration
+cgroupDriver: systemd
+---
+apiVersion: kubeadm.k8s.io/v1beta2
+kind: ClusterConfiguration
+kubernetesVersion: stable
+imageRepository: registry.bing89.com/kubernetes
+controlPlaneEndpoint: 192.168.0.200:8443
+apiServer:
+  certSANs:
+  - "k8smaster1"
+  - "k8smaster2"
+  - "k8smaster3"
+  - "192.168.0.200"
+  - "192.168.0.201"
+  - "192.168.0.202"
+  - "192.168.0.203"
+networking:
+  podSubnet: 10.244.0.0/16
+
+---
+#配置kubeproxy使用ipvs。似乎不配置也行
+apiVersion: kubeproxy.config.k8s.io/v1alpha1
+kind: KubeProxyConfiguration
+mode: ipvs
+EOF
+```
+
+## 基于外部etcd集群的cluster
+
+```yaml
+# 配置kubelet使用systemd作为cgroups驱动
+apiVersion: kubelet.config.k8s.io/v1beta1
+kind: KubeletConfiguration
+cgroupDriver: systemd
+---
+apiVersion: kubeadm.k8s.io/v1beta2
+kind: ClusterConfiguration
+kubernetesVersion: stable
+controlPlaneEndpoint: "192.168.0.200:8443"
+imageRepository: registry.bing89.com/kubernetes
+etcd:
+    external:
+        endpoints: ["https://192.168.0.211:2379","https://192.168.0.212:2379","https://192.168.0.213:2379"]
+        caFile: /etc/kubernetes/pki/etcd/ca.crt
+        certFile: /etc/kubernetes/pki/apiserver-etcd-client.crt
+        keyFile: /etc/kubernetes/pki/apiserver-etcd-client.key
+apiServer:
+  certSANs: ["192.168.0.201","192.168.0.202","192.168.0.203"]
+```
+
+## 外部etcd集群配置
+
+```yaml
+# 配置kubelet使用systemd作为cgroups驱动
+apiVersion: kubelet.config.k8s.io/v1beta1
+kind: KubeletConfiguration
+cgroupDriver: systemd
+---
+apiVersion: "kubeadm.k8s.io/v1beta2"
+kind: ClusterConfiguration
+imageRepository: registry.bing89.com/kubernetes
+etcd:
+    local:
+        serverCertSANs:
+        - "192.168.0.211"
+        peerCertSANs:
+        - "192.168.0.211"
+        extraArgs:
+            initial-cluster: infra0=https://192.168.0.211:2380,infra1=https://192.168.0.212:2380,infra2=https://192.168.0.213:2380
+            initial-cluster-state: new
+            name: infra0
+            listen-peer-urls: https://192.168.0.211:2380
+            listen-client-urls: https://192.168.0.211:2379
+            advertise-client-urls: https://192.168.0.211:2379
+            initial-advertise-peer-urls: https://192.168.0.211:2380
+```

kubernetes/installation/metrics.md

@@ -0,0 +1,19 @@
+# 安装metrics server
+
+```bash
+kubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml
+```
+
+如果出现错误`unable to fully scrape metrics from node` 或 `x509: cannot validate certificate for 10.0.1.41 because it doesn't contain any IP SANs`, 在配置文件中添加启动参数`--kubelet-insecure-tls`
+
+```yaml
+spec:
+      containers:
+      - args:
+        - --cert-dir=/tmp
+        - --secure-port=4443
+        - --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
+        - --kubelet-use-node-status-port
+        - --kubelet-insecure-tls #这里是新增的
+        image: registry.bing89.com/kubernetes/metrics-server:v0.4.1
+```

kubernetes/installation/promethues.md

@@ -0,0 +1,13 @@
+# 安装Prometheus监控
+
+使用项目 ：[kube-prometheus](https://github.com/prometheus-operator/kube-prometheus.git)
+
+选择版本可用的release版本。
+
+执行命令
+
+```bash
+kubectl create -f manifests/setup
+until kubectl get servicemonitors --all-namespaces ; do date; sleep 1; echo ""; done
+kubectl create -f manifests/
+```

kubernetes/installation/readme.md

@@ -0,0 +1,44 @@
+# 安装kubernetes集群
+
+本文档使用centos7.2009作为基础操作系统，使用kubeadm为安装工具。可以使用本文档逐步操作安装kubernetes集群，也可使用自动化安装脚本[install.sh](scripts/readme.md)来快速安装。
+
+安装不同配置的集群需要不同的节点数，每节点CPU核心不低于2，内存不少于2GB，至多需要9个节点。
+
+本文档使用192.168.0.0/24 为节点网络。
+
+## 环境配置
+
+使用[配置运行环境](config_run_env.md)文档来配置运行环境，建议所有节点使用完全一致的配置。
+
+## 创建kubeadm配置
+
+参照[kubeadm配置示例](kubeadm_config_example.md)创建正确的集群配置。
+
+## 初始化集群
+
+### 初始化单controlplane节点集群
+
+```bash
+kubeadm init --config /etc/kubernetes/kubeadmcfg.yaml
+```
+如果只为集群准备了一个节点，需要取消节点的污点标记，用于调度pod。
+
+```bash
+kubectl taint nodes --all node-role.kubernetes.io/master-
+```
+
+### 初始化基于堆叠etcd的集群
+
+参照[使用kubeadm安装基于堆叠etcd的kubernetes](install_cluster_with_stacked_etcd.md)
+
+### 初始化基于外部etcd集群的集群
+
+参照[使用kubeadm安装基于外部etcd集群的kubernetes](install_cluster_with_outside_etcd.md)
+
+## 安装网络
+
+### 安装calico
+
+```bash
+kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml
+```

kubernetes/installation/scripts/install.sh

@@ -0,0 +1,366 @@
+#!/bin/bash
+
+##
+HAPASSWORD="4orLcyKqDFWrmGlQ"
+
+init_etcd(){
+    echo "init etcd cluster: $@"
+    echo "create config files..."
+    kubeadm reset -f
+    if [ ! -d /tmp/kubelet.service.d ];then
+        mkdir /tmp/kubelet.service.d
+    fi
+    cat << EOF > /tmp/kubelet.service.d/20-etcd-service-manager.conf
+[Service]
+ExecStart=
+#  Replace "systemd" with the cgroup driver of your container runtime. The default value in the kubelet is "cgroupfs".
+ExecStart=/usr/bin/kubelet --container-runtime=remote --container-runtime-endpoint=unix:///run/containerd/containerd.sock  --address=127.0.0.1 --pod-manifest-path=/etc/kubernetes/manifests --pod-infra-container-image=registry.bing89.com/kubernetes/pause:3.2
+Restart=always
+EOF
+    if [[ -f etc/kubernetes/pki/etcd/ca.crt ]] && [[ -f etc/kubernetes/pki/etcd/ca.key ]];then
+        echo 'using exists key.'
+    else
+        if [[ -f etc/kubernetes/pki/etcd/ca.crt ]] || [[ -f etc/kubernetes/pki/etcd/ca.key ]]; then
+            echo 'ssl key config error, maybe there one key is exists. exit '
+            exit 2
+        fi
+        echo 'init kubernetes ssh keys'
+        kubeadm init phase certs etcd-ca
+    fi
+    NAME_PREFIX="infra"
+    INDEX=0
+    INIT_CLUSTERS=""
+    for ETCD_HOST in $@; do
+        if [ "x${INIT_CLUSTERS}" == "x" ]; then
+            INIT_CLUSTERS="${NAME_PREFIX}${INDEX}=https://${ETCD_HOST}:2380"
+        else
+            INIT_CLUSTERS="${INIT_CLUSTERS},${NAME_PREFIX}${INDEX}=https://${ETCD_HOST}:2380"
+        fi
+        INDEX=$(expr ${INDEX} + 1)
+    done
+    echo "init_clusters: ${INIT_CLUSTERS}"
+    INDEX=0
+    for HOST in ${@};
+    do
+        if [ ! -d /tmp/${HOST} ];then
+            mkdir /tmp/${HOST}
+        else
+            rm -rf /tmp/${HOST}/*
+        fi
+        cat <<EOF >/tmp/${HOST}/etcdcfg.yaml
+apiVersion: kubelet.config.k8s.io/v1beta1
+kind: KubeletConfiguration
+cgroupDriver: systemd
+---
+apiVersion: "kubeadm.k8s.io/v1beta2"
+kind: ClusterConfiguration
+imageRepository: registry.bing89.com/kubernetes
+etcd:
+    local:
+        serverCertSANs:
+        - "${HOST}"
+        peerCertSANs:
+        - "${HOST}"
+        extraArgs:
+            initial-cluster: ${INIT_CLUSTERS}
+            initial-cluster-state: new
+            name: ${NAME_PREFIX}${INDEX}
+            listen-peer-urls: https://${HOST}:2380
+            listen-client-urls: https://${HOST}:2379
+            advertise-client-urls: https://${HOST}:2379
+            initial-advertise-peer-urls: https://${HOST}:2380
+EOF
+        
+        kubeadm init phase certs etcd-server --config=/tmp/${HOST}/etcdcfg.yaml
+        kubeadm init phase certs etcd-peer --config=/tmp/${HOST}/etcdcfg.yaml
+        kubeadm init phase certs etcd-healthcheck-client --config=/tmp/${HOST}/etcdcfg.yaml
+        kubeadm init phase certs apiserver-etcd-client --config=/tmp/${HOST}/etcdcfg.yaml
+        cp -R /etc/kubernetes/pki /tmp/${HOST}/
+        # 清理不可重复使用的证书
+        find /etc/kubernetes/pki -not -name ca.crt -not -name ca.key -type f -delete
+        # 清理不应从此主机复制的证书
+        if [ "x${INDEX}" != "x0" ];then
+            find /tmp/${HOST} -name ca.key -type f -delete
+        fi
+        INDEX=$(expr ${INDEX} + 1)
+    done
+    echo "configure etcd hosts"
+    for HOST in ${@};
+    do
+        scp -r /tmp/kubelet.service.d ${HOST}:/etc/systemd/system/
+        scp -r /tmp/${HOST}/* ${HOST}:/tmp
+        ssh ${HOST} "systemctl daemon-reload"
+        ssh ${HOST} "kubeadm reset -f && rsync -ivhPr /tmp/pki /etc/kubernetes/"
+        ssh ${HOST} "systemctl restart kubelet && kubeadm init phase etcd local --config=/tmp/etcdcfg.yaml"
+    done
+    echo "cluster init finished. use this command to check cluster status"
+    echo "docker run --rm -it --net host -v /etc/kubernetes:/etc/kubernetes registry.bing89.com/kubernetes/etcd:3.4.13-0 etcdctl --cert /etc/kubernetes/pki/etcd/peer.crt --key /etc/kubernetes/pki/etcd/peer.key --cacert /etc/kubernetes/pki/etcd/ca.crt --endpoints https://${HOST}:2379 endpoint health --cluster"
+}
+
+init_controller(){
+    echo "init controller: $@"
+    echo "warning: your kubelet will reset"
+    echo "backup ha pod if exists"
+    if [ -f /etc/kubernetes/manifests/haproxy.yaml ];then
+        cp /etc/kubernetes/manifests/haproxy.yaml /tmp/haproxy.yaml.backup
+    fi
+
+
+    echo "creating kubeadm config file"
+    ENDPOINTS="["
+    for ETCD_HOST in ${ETCD_HOSTS[@]}; do
+        if [ "x${ENDPOINTS}" == "x[" ];then
+            ENDPOINTS="${ENDPOINTS}\"https://${ETCD_HOST}:2379\""
+        else
+            ENDPOINTS="${ENDPOINTS},\"https://${ETCD_HOST}:2379\""
+        fi
+    done
+    ENDPOINTS="${ENDPOINTS}]"
+    echo "etcd end points: ${ENDPOINTS}"
+    APISERVERSANS="["
+    for CONTROLLER_HOST in ${CONTROLLER_HOSTS[@]}
+    do
+        if [ "x${APISERVERSANS}" == "x[" ];then
+            APISERVERSANS="${APISERVERSANS}\"${CONTROLLER_HOST}\""
+        else
+            APISERVERSANS="${APISERVERSANS},\"${CONTROLLER_HOST}\""
+        fi
+    done
+    APISERVERSANS="${APISERVERSANS}]"
+    cat <<EOF >/tmp/kubeadmcfg.yaml
+apiVersion: kubelet.config.k8s.io/v1beta1
+kind: KubeletConfiguration
+cgroupDriver: systemd
+---
+apiVersion: kubeadm.k8s.io/v1beta2
+kind: ClusterConfiguration
+kubernetesVersion: stable
+controlPlaneEndpoint: "${APIHOST}:8443"
+imageRepository: registry.bing89.com/kubernetes
+etcd:
+    external:
+        endpoints: ${ENDPOINTS}
+        caFile: /etc/kubernetes/pki/etcd/ca.crt
+        certFile: /etc/kubernetes/pki/apiserver-etcd-client.crt
+        keyFile: /etc/kubernetes/pki/apiserver-etcd-client.key
+apiServer:
+  certSANs: ${APISERVERSANS}
+EOF
+
+    kubeadm reset -f
+    echo "restore ha pod if exists"
+    if [ -f /tmp/haproxy.yaml.backup ];then
+        cp /tmp/haproxy.yaml.backup /etc/kubernetes/manifests/haproxy.yaml
+        systemctl restart kubelet
+    fi
+    mkdir /etc/kubernetes/pki/etcd/
+    scp /tmp/$1/pki/etcd/ca.crt /etc/kubernetes/pki/etcd/ca.crt
+    scp /tmp/$1/pki/apiserver-etcd-client.crt /etc/kubernetes/pki/apiserver-etcd-client.crt
+    scp /tmp/$1/pki/apiserver-etcd-client.key /etc/kubernetes/pki/apiserver-etcd-client.key
+    kubeadm init --config /tmp/kubeadmcfg.yaml --upload-certs
+}
+
+init_haproxy(){
+    echo 'init haproxy'
+    echo 'install pcs'
+    for HOST in ${HA_HOSTS[@]}
+    do
+        ssh ${HOST}  "yum install corosync pacemaker pcs fence-agents resource-agents -y && systemctl enable --now pcsd"
+    done
+    echo 'config pcs'
+    for HOST in ${HA_HOSTS[@]}
+    do
+        ssh ${HOST}  "echo ${HAPASSWORD} | passwd --stdin hacluster && pcs cluster auth -u hacluster -p ${HAPASSWORD} ${HA_HOSTS}"
+        ssh ${HOST}  "pcs cluster setup --start --name k8s_cluster ${HA_HOSTS}"
+        ssh ${HOST}  "pcs cluster enable --all && pcs cluster start  --all && pcs cluster status && pcs status corosync"
+        ssh ${HOST}  "pcs property set stonith-enabled=false && pcs property set no-quorum-policy=ignore && crm_verify -L -V"
+    done
+    ssh ${HA_HOSTS[0]}  "pcs resource create vip ocf:heartbeat:IPaddr2 ip=${APIHOSTS} cidr_netmask=28 op monitor interval=28s"
+
+    echo 'write haproxy config...'
+    APISERVERS=""
+    INDEX=1
+    PREFIX="k8smaster"
+
+    cat <<EOF >/tmp/haproxy.cfg
+# /etc/haproxy/haproxy.cfg
+#---------------------------------------------------------------------
+# Global settings
+#---------------------------------------------------------------------
+global
+    log /dev/log local0
+    log /dev/log local1 notice
+    daemon
+
+#---------------------------------------------------------------------
+# common defaults that all the 'listen' and 'backend' sections will
+# use if not designated in their block
+#---------------------------------------------------------------------
+defaults
+    mode                    http
+    log                     global
+    option                  httplog
+    option                  dontlognull
+    option http-server-close
+    option forwardfor       except 127.0.0.0/8
+    option                  redispatch
+    retries                 1
+    timeout http-request    10s
+    timeout queue           20s
+    timeout connect         5s
+    timeout client          20s
+    timeout server          20s
+    timeout http-keep-alive 10s
+    timeout check           10s
+
+#---------------------------------------------------------------------
+# apiserver frontend which proxys to the masters
+#---------------------------------------------------------------------
+frontend apiserver
+    bind *:8443
+    mode tcp
+    option tcplog
+    default_backend apiserver
+
+#---------------------------------------------------------------------
+# round robin balancing for apiserver
+#---------------------------------------------------------------------
+backend apiserver
+    option httpchk GET /healthz
+    http-check expect status 200
+    mode tcp
+    option ssl-hello-chk
+    balance     roundrobin
+EOF
+INDEX=0
+for HOST in ${HA_HOSTS[@]}
+do
+    echo "        server ${HOST} ${CONTROLLER_HOSTS[${INDEX}]}:6443 weight 1 maxconn 1000 check inter 2000 rise 2 fall 3\n" >> /tmp/haproxy.cfg
+    INDEX=$(expr ${INDEX} + 1)
+done
+echo "write haproxy pod yaml"
+cat <<EOF >/tmp/haproxy.yaml
+apiVersion: v1
+kind: Pod
+metadata:
+  name: haproxy
+  namespace: kube-system
+spec:
+  containers:
+  - image: registry.bing89.com/dockerhub/haproxy:lts-alpine
+    name: haproxy
+    livenessProbe:
+      failureThreshold: 8
+      httpGet:
+        host: localhost
+        path: /healthz
+        port: 8443
+        scheme: HTTPS
+    volumeMounts:
+    - mountPath: /usr/local/etc/haproxy/haproxy.cfg
+      name: haproxyconf
+      readOnly: true
+  hostNetwork: true
+  volumes:
+  - hostPath:
+      path: /etc/haproxy/haproxy.cfg
+      type: FileOrCreate
+    name: haproxyconf
+status: {}
+EOF
+    for HOST in ${CONTROLLER_HOSTS[@]}
+    do
+        ssh ${HOST} "if [ ! -d /etc/haproxy ];then mkdir /etc/haproxy; fi"
+        scp /tmp/haproxy.cfg ${HOST}:/etc/haproxy/haproxy.cfg
+        scp /tmp/haproxy.yaml  ${HOST}:/etc/kubernetes/manifests/haproxy.yaml
+    done
+    echo 'init haproxy finished'
+}
+
+init_kube_vip(){
+    echo "init kube_vip..."
+    echo "exit"
+    exit 0
+    for HOST in ${CONTROLLER_HOSTS[@]}
+    do
+        if [ ! -d /tmp/${HOST}/kube-vip ]; then
+            mkdir -p /tmp/${HOST}/kube-vip
+        fi
+    done
+}
+
+init_network(){
+    echo "init cni: $@"
+
+}
+
+USAGE_EXITS(){
+    echo "this is help message."
+    exit 1
+}
+
+check_args(){
+    if [ "x${ETCD_HOSTS}" == "x" ];then
+        USAGE_EXITS
+    fi
+     if [ "x${CONTROLLER_HOSTS}" == "x" ];then
+         USAGE_EXITS
+     fi
+    if [ "x${APIHOST}" == "x" ];then
+        USAGE_EXITS
+    fi
+}
+main(){
+    COMMAND=$1
+    shift
+    while getopts "c:e:n:a:p:h" arg
+    do
+        case ${arg} in 
+            e)
+                ETCD_HOSTS=(${OPTARG//,/ })
+                ;;
+            c)
+                CONTROLLER_HOSTS=(${OPTARG//,/ })
+                ;;
+            n)
+                NETWORK_CNI=${OPTARG}
+                ;;
+            a)
+                APIHOST=${OPTARG}
+                ;;
+            p)
+                HA_HOSTS=(${OPTARG//,/ })
+                ;;
+            h)
+                USAGE_EXITS
+                ;;
+        esac
+    done
+    check_args
+    case ${COMMAND} in
+    etcd)
+        # echo ${ETCD_HOSTS[0]}
+        init_etcd ${ETCD_HOSTS[@]}
+        ;;
+    controllplane)
+        init_controller ${ETCD_HOSTS}
+        ;;
+    network)
+        init_network ${NETWORK_CNI}
+        ;;
+    haproxy)
+        init_haproxy
+        ;;
+    kubevip)
+        init_kube_vip
+        ;;
+    help)
+        USAGE_EXITS
+        ;;
+    *)
+        USAGE_EXITS
+        ;;
+    esac
+}
+
+main $@

kubernetes/installation/scripts/readme.md

@@ -0,0 +1,17 @@
+# install.sh 使用帮助
+
+```bash
+install.sh [command] -c [controlplane_hosts] -e [etcd_hosts] -n [network_name] -a [apiserver_host] [-p [haproxy_hosts]] [-h]
+```
+## command
+
+现在脚本支持以下命令
+
+- etcd 初始化etcd集群 必须使用-e指定etcd集群的节点列表
+- controlplane 初始化controlplane 必须使用-e指定etcd集群的节点列表，-c 指定controlplane节点列表，-a 指定apiserver的IP地址或域名
+- network 安装网络，必须使用-n指定要安装的网络名称，***该功能暂未开发完成***
+- haproxy 初始化haproxy， 必须-c 指定controlplane节点列表， -p 指定haproxy节点列表，***暂时配置为haproxy与controlplane位于同一节点，所以两个列表需要一一对应。***
+
+## args
+
+节点列表使用`,`分隔，例如`192.168.1.2,192.168.1.3`或`node1,node2`

kubernetes/installation/ubuntu.md

@@ -0,0 +1,22 @@
+# ubuntu下安装kubernetes
+
+添加key
+
+```bash
+https_proxy=192.168.0.11:1080 curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
+```
+
+添加源
+
+```bash
+cat <<EOF >/etc/apt/sources.list.d/kubernetes.list
+deb https://mirrors.tuna.tsinghua.edu.cn/kubernetes/apt kubernetes-xenial main
+EOF
+```
+
+安装
+
+```bash
+apt update && apt install docker.io kubelet kubectl kubeadm -y
+```
+

kubernetes/kubectl/completion.md

@@ -0,0 +1,23 @@
+# kubectl 命令自动填充配置
+
+安装依赖
+
+```bash
+yum install -y bash-completion
+```
+
+生成自动完成配置
+
+```bash
+kubectl completion bash >.kubectl
+```
+
+添加配置到profile
+
+```bash
+cat <<EOF >>~/.bashrc
+if [ -f ~/.kubectl ];then
+    . ~/.kubectl
+fi
+EOF
+```

kubernetes/mantaince/add_new_node.md

@@ -0,0 +1,25 @@
+# kubeadm添加一个新的节点
+
+首先获取证书的hash值， 这个值用于 `--discovery-token-ca-cert-hash`
+
+```bash
+HASH=$(openssl x509 -pubkey -in /etc/kubernetes/pki/ca.crt | openssl rsa -pubin -outform der 2>/dev/null | openssl dgst -sha256 -hex | sed 's/^.* //')
+```
+
+获取token, 这个值用于 `--token`
+
+```bash
+kubeadm token list
+```
+
+如果没有任何token列出，创建一个
+
+```bash
+TOKEN=$(kubeadm token create)
+```
+
+添加节点到集群
+
+```bash
+kubeadm join k8smaster:6443 --token ${TOKEN} --discovery-token-ca-cert-hash sha256:${HASH}
+```

kubernetes/mantaince/change_master_ip.md

@@ -0,0 +1,41 @@
+# 修改主节点IP地址
+
+***本文只在单master节点上测试通过***
+
+首先修改etcd和api-server的地址
+
+```bash
+OLD_IP=""
+NEW_IP=""
+sed -e "s/${OLD_IP}/${NEW_IP}/g" -i /etc/kubernetes/manifests/etcd.yaml
+sed -e "s/${OLD_IP}/${NEW_IP}/g" -i /etc/kubernetes/manifests/kube-apiserver.yaml
+```
+
+生成新的conf
+
+```bash
+kubeadm init phase kubeconfig admin --apiserver-advertise-address ${NEW_IP}
+```
+
+生成新的证书
+
+```bash
+mv /etc/kubernetes/pki/apiserver.key /etc/kubernetes/pki/apiserver.key.bak
+mv /etc/kubernetes/pki/apiserver.crt /etc/kubernetes/pki/apiserver.crt.bak
+kubeadm init phase certs apiserver  --apiserver-advertise-address 192.168.0.31
+```
+
+重启服务
+
+***由于docker已被kubernetes抛弃，这里使用的containerd，使用docker的旧版kubernetes要重启docker***
+
+```bash
+systemctl restart containerd kubelet
+```
+
+更新kubectl的管理conf
+
+```bash
+rm -f ~/.kube/config
+cp /etc/kubernetes/admin.conf ~/.kube/config
+```

kubernetes/mantaince/delete_terminating_resource.md

@@ -0,0 +1,19 @@
+# 删除处于terminating状态无法删除的资源
+
+以namespace为例
+
+```bash
+cat <<EOF >/tmp/m.json
+{
+    "apiVersion": "v1",
+    "kind": "Namespace",
+    "metadata": {
+        "name": "monitoring"
+    }
+}
+EOF
+
+kubectl proxy
+
+curl -k -H 'Content-Type:application/json' -X PUT --data-binary @/tmp/m.json http://127.0.0.1:8001/api/v1/namespaces/monitoring/finalize
+````

kubernetes/mantaince/nfs.md

@@ -0,0 +1,15 @@
+# nfs 使用问题
+
+## `unexpected error getting claim reference: selfLink was empty, can't make reference` 导致pvc无法绑定挂载
+
+编辑文件 `/etc/kubernetes/manifests/kube-apiserver.yaml` 添加内容 `--feature-gates=RemoveSelfLink=false`
+
+```yaml
+- command:
+....
+- --feature-gates=RemoveSelfLink=false
+image: registry.aliyuncs.com/k8sxio/kube-apiserver:v1.21.2
+```
+
+参见 [isuse](https://github.com/kubernetes-sigs/nfs-subdir-external-provisioner/issues/25)
+

kubernetes/network/dns/dns-autoscaler.yaml

@@ -0,0 +1,35 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dns-autoscaler
+  namespace: kube-system
+  labels:
+    k8s-app: dns-autoscaler
+spec:
+  selector:
+    matchLabels:
+      k8s-app: dns-autoscaler
+  template:
+    metadata:
+      labels:
+        k8s-app: dns-autoscaler
+    spec:
+      containers:
+      - name: autoscaler
+        image: registry.bing89.com/gcrio/cluster-proportional-autoscaler-amd64:1.8.0
+        resources:
+          requests:
+            cpu: 20m
+            memory: 10Mi
+        command:
+        - /cluster-proportional-autoscaler
+        - --namespace=kube-system
+        - --configmap=dns-autoscaler
+        - --target=deployment/coredns
+        # When cluster is using large nodes(with more cores), "coresPerReplica" should dominate.
+        # If using small nodes, "nodesPerReplica" should dominate.
+        - --default-params={"linear":{"coresPerReplica":256,"nodesPerReplica":16,"min":1}}
+        - --logtostderr=true
+        - --v=2
+      imagePullSecrets:
+      - name: registry-bing89

kubernetes/network/policy/pod_access_limit.md

@@ -0,0 +1,56 @@
+# 限制pod访问
+
+## 前期准备
+
+创建一个pod
+
+```bash
+kubectl create deployment nginx --image=nginx
+```
+
+暴露端口
+
+```
+kubectl expose deployment nginx --port=80
+```
+
+测试访问
+
+```
+kubectl run busybox --rm -i --image=busybox /bin/sh
+wget --spider --timeout=1 nginx
+```
+
+## 配置策略
+
+nginx-policy.yaml
+
+```yaml
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: access-nginx
+spec:
+  podSelector:
+    matchLabels:
+      app: nginx
+  ingress:
+  - from:
+    - podSelector:
+        matchLabels:
+          access: "true"
+```
+
+应用策略
+
+```
+kubectl apply -f nginx-policy.yaml
+```
+
+***使用之前的测试方法，已经无法访问。***
+
+测试访问
+
+```bash
+kubectl run busybox --rm -ti --labels="access=true" --image=busybox -- /bin/sh
+```

kubernetes/readme.md

@@ -0,0 +1,5 @@
+# Kubernetes
+
+安装[配置kubernetes](installation/readme.md)
+
+[kubernetes资源配置参考](demo/readme.md)

kubernetes/secrets/create_docker_pull.md

@@ -0,0 +1,12 @@
+# 创建Docker镜像下载secret
+
+创建一个镜像下载secret
+
+```bash
+ kubectl create secret generic registry-bing89 --from-file=.dockerconfigjson=/root/.docker/config.json --type=kubernetes.io/dockerconfigjson
+```
+或者
+
+```bash
+kubectl create secret docker-registry myregistrykey --docker-server=registry.bing89.com --docker-username=admin --docker-password=abcd1234 --docker-email=kun1.huang@outlook.com
+```

kubernetes/secrets/encryption.md

@@ -0,0 +1,139 @@
+# Secret 的静态加密
+
+kubernetes 集群中，secret默认是明文存储(base64编码)。可以通过开启静态加密来对secret进行加密。
+
+## 开启静态加密
+
+通过配置apiserver来开启静态加密功能。
+
+### 创建静态加密配置
+
+开启静态加密需要一个配置文件。以下是配置示例：
+
+```yaml
+apiVersion: apiserver.config.k8s.io/v1
+kind: EncryptionConfiguration
+resources:
+  - resources:
+    - secrets
+    providers:
+    - identity: {}
+    - aesgcm:
+        keys:
+        - name: key1
+          secret: c2VjcmV0IGlzIHNlY3VyZQ==
+        - name: key2
+          secret: dGhpcyBpcyBwYXNzd29yZA==
+    - aescbc:
+        keys:
+        - name: key1
+          secret: c2VjcmV0IGlzIHNlY3VyZQ==
+        - name: key2
+          secret: dGhpcyBpcyBwYXNzd29yZA==
+    - secretbox:
+        keys:
+        - name: key1
+          secret: YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXoxMjM0NTY=
+```
+
+***这个配置示例是从官方文档复制来的。这是一个包含许多类型的配置，直接使用是无法加密的(可能是因为`- identity: {}`是列表第一项)，使用时请参考后面的配置***
+
+kubernetes 支持 `identity`、`aescbc`、`secretbox`、`aesgcm`、`kms` 这几种加密方式，其中`aescbc`为官方推荐加密类型，`aesgcm`为不推荐加密类型，`kms`需要第三方工具管理。
+
+加密密钥获取方式
+
+```bash
+head -c 32 /dev/urandom | base64
+```
+此命令会获得一个随机的32位密钥
+
+***只提供需要的加密类型的配置***
+
+```yaml
+apiVersion: apiserver.config.k8s.io/v1
+kind: EncryptionConfiguration
+resources:
+  - resources:
+    - secrets
+    providers:
+    - aescbc:
+        keys:
+        - name: key1
+          secret: eGy+iOygy5lN1jWWYRVtVXywe5HDc1Op9lUgR5MRaPo=
+    - identity: {}
+```
+
+### 配置apiserver
+
+编辑文件`kube-apiserver.yaml`
+
+```yaml
+apiVersion: v1
+kind: Pod
+metadata:
+  ...
+spec:
+  containers:
+  - command:
+    - kube-apiserver
+    ...
+    - --experimental-encryption-provider-config=/etc/kubernetes/pki/encryption.yaml
+```
+
+***如果是kubeadm安装的集群，配置文件位于`/etc/kubernetes/manifests/kube-apiserver.yaml`***
+
+**注意：这里的加密配置文件放在`/etc/kubernetes/pki/encryption.yaml`，因为这个目录是默认挂载到apiserver的pod里的，也可以放在其他目录并修改挂载选项挂载进去**
+
+**注意：必须先写好配置文件，在修改apiserver的配置，否则apiserver可能需要多次重启**
+
+配置文件修改完成后，apiserver的pod会自动重启。
+
+现在，新创建的secret会自动加密了。
+
+## 验证
+
+创建一个secret
+
+```bash
+kubectl create secret generic secret1 -n default --from-literal=mykey=mydata
+```
+
+使用 etcdctl 命令行，从 etcd 中读取 secret：
+
+```bash
+ETCD_POD=$(kubectl -n kube-system get pod -l component=etcd  -o name)
+kubectl -n kube-system exec -it ${ETCD_POD} -- etcdctl get /registry/secrets/default/secret1 --endpoints=localhost:2379 --cert=/etc/kubernetes/pki/etcd/peer.crt --key=/etc/kubernetes/pki/etcd/peer.key --cacert=/etc/kubernetes/pki/etcd/ca.crt |hexdump -C
+```
+***这个是从官方文档改成kubectl的命令，原命令`ETCDCTL_API=3 etcdctl get /registry/secrets/default/secret1 [你的参数] | hexdump -C`***
+
+可以在结果中找到`1..k8s:enc:aescb`表示加密成功，这是文件的其他内容都是乱码
+
+```text
+00000000  2f 72 65 67 69 73 74 72  79 2f 73 65 63 72 65 74  |/registry/secret|
+                                                                              00000010  73 2f 64 65 66 61 75 6c  74 2f 73 65 63 72 65 74  |s/default/secret|
+                                                                                                                                                            00000020  31 0d 0a 6b 38 73 3a 65  6e 63 3a 61 65 73 63 62  |1..k8s:enc:aescb|
+                       00000030  63 3a 76 31 3a 6b 65 79  31 3a c6 76 5c ca d4 9a  |c:v1:key1:.v\...|
+                                                                                                     00000040  ee 49 87 86 98 7e d9 22  30 42 16 c7 9a 7e e1 08  |.I...~."0B...~..|
+                                                                                                                                                                                   00000050  71 e1 8b 1d bc 57 44 ae  04 77 5f 8f 5c f6 29 ee  |q....WD..w_.\.).|
+                                              00000060  8f 3c ed 2b cc 8a cb d2  25 fd b2 ba 3a c3 c5 5e  |.<.+....%...:..^|
+                                                                                                                            00000070  70 99 03 6e 0d 0a e9 c4  90 a4 cb e3 09 92 ec de  |p..n............|
+                                                                                                                                                                                                          00000080  2f 20 eb 35 b7 be 93 f0  09 a1 84 48 8c 3a ed 43  |/ .5.......H.:.C|
+                                                                     00000090  47 b6 cf 96 cc 25 7e 54  f3 c2 93 34 cc 0c 25 6d  |G....%~T...4..%m|
+                                                                                                                                                   000000a0  d9 df ca f3 ed a1 d8 8e  55 1b 26 58 d9 3f f2 fc  |........U.&X.?..|
+              000000b0  58 ed a1 0f 4d 4b e9 11  bf ba e0 52 4f 74 8e 5b  |X...MK.....ROt.[|
+                                                                                            000000c0  47 c3 68 db f9 6c e9 b5  f5 3c 1c 64 a4 49 9b 68  |G.h..l...<.d.I.h|
+                                                                                                                                                                          000000d0  18 30 de d9 1c 36 fb 43  e2 d7 0f 18 84 09 2d 46  |.0...6.C......-F|
+                                     000000e0  b1 97 31 87 0f eb 68 83  2c 4f 0b 42 1c 01 d0 ca  |..1...h.,O.B....|
+                                                                                                                   000000f0  e2 88 b9 0c 97 cf 77 8d  d1 73 83 ed 1d c2 19 57  |......w..s.....W|
+                                                                                                                                                                                                 00000100  2f f0 cd 5e 39 19 d6 67  fd 73 88 ab 09 bf 90 09  |/..^9..g.s......|
+                                                            00000110  78 69 1e 60 22 60 97 b9  83 c4 38 0c ea e2 02 9a  |xi.`"`....8.....|
+                                                                                                                                          00000120  16 ac 6e ca 3e c1 28 77  21 32 4a 7a 5a a0 11 4f  |..n.>.(w!2JzZ..O|
+     00000130  d4 1f 2b a8 6b 85 43 47  fb 43 ea 0d 0a           |..+.k.CG.C...|
+0000013d
+```
+
+通过api查看
+
+```bash
+kubectl describe secret secret1 -n default
+```

kubernetes/secrets/readme.md

@@ -0,0 +1,5 @@
+# Secrets
+
+[静态加密](encryption.md)
+
+[创建Docker镜像下载secret](create_docker_pull.md)

kubernetes/upgrade/readme.md

@@ -0,0 +1,94 @@
+# Kubernetes集群升级
+
+只能从一个次版本升级到下一个次版本，或者在次版本相同时升级补丁版本。 也就是说，升级时不可以跳过次版本。 例如，你只能从 1.y 升级到 1.y+1，而不能从 1.y 升级到 1.y+2。
+
+## 升级control plane
+
+必须先升级第一个controlplane
+
+升级`kubeadm`
+
+```bash
+export VERSION="1.20.1"
+yum install -y kubeadm-${VERSION}-0 --disableexcludes=kubernetes
+```
+
+腾空controlplane
+
+```bash
+export NODE="k8smaster1"
+kubectl drain ${NODE} --ignore-daemonsets
+```
+
+查看是否可以升级以及可升级的版本
+
+```bash
+kubeadm upgrade plan
+```
+
+升级到指定版本
+
+```bash
+kubeadm upgrade apply v${VERSION}
+```
+
+取消控制面节点的保护
+
+```bash
+kubectl uncordon ${NODE}
+```
+
+升级其他controlplane, 参考[升级node](##升级node)
+
+## 升级node
+
+升级之前，请确保control plane已经升级，建议一次只升级1个或部分节点，避免影响服务。
+
+升级`kubeadm`，在node执行
+
+```bash
+export VERSION="1.20.1-0"
+yum install -y kubeadm-${VERSION} --disableexcludes=kubernetes
+```
+
+将节点标记为不可调度并逐出工作负载，为维护做好准备。在control执行
+
+```bash
+export NODE="k8snode1"
+kubectl drain ${NODE} --ignore-daemonsets
+```
+
+输出类似下文
+
+```bash
+node/k8snode1 already cordoned
+WARNING: ignoring DaemonSet-managed Pods: kube-system/calico-node-jcpf2, kube-system/kube-proxy-rsskt
+evicting pod kube-system/calico-kube-controllers-744cfdf676-g86dz
+pod/calico-kube-controllers-744cfdf676-g86dz evicted
+node/k8snode1 evicted
+```
+
+升级kubelet配置，在node执行
+
+```bash
+kubeadm upgrade node
+```
+
+升级kubelet服务，在node执行
+
+```bash
+yum install -y kubelet-${VERSION} kubectl-${VERSION} --disableexcludes=kubernetes
+```
+
+重启服务
+
+```bash
+systemctl daemon-reload
+systemctl restart kubelet
+```
+
+将节点标记为可调度，让节点重新上线
+
+```bash
+kubectl uncordon ${NODE}
+```

kvm/bridge/readme.md

@@ -0,0 +1,11 @@
+# 创建bridge
+
+centos 7.6 之后没有brctl了
+
+```bash
+nmcli connection
+nmcli connection add type bridge con-name vir0 ifname vir0 autoconnect yes
+sudo nmcli connection add type bridge con-name vir0 ifname vir0 autoconnect yes
+nmcli connection
+sudo nmcli connection add type bridge-slave ifname enp4s0 master vir0 && sudo nmcli connection down enp4s0 && sudo nmcli connection up vir0 && nmcli connection
+```

kvm/qemu/qemu-img.md

@@ -0,0 +1,8 @@
+# qemu-img
+qemu-img 是kvm的卷管理工具。
+
+## 创建一个卷
+
+```bash
+qemu-img create -f qcow2 centos7.qcow2 20G
+```

kvm/qemu/readme.md

@@ -0,0 +1 @@
+# qemu

kvm/readm.md

@@ -0,0 +1,2 @@
+# kvm
+linux 虚拟机

kvm/virsh/example.xml

@@ -0,0 +1,37 @@
+<domain type='kvm'> 
+    <name>test_ubuntu</name>
+    <memory>4194304</memory>
+    <currentMemory>4194304</currentMemory>
+    <vcpu>2</vcpu>
+    <os> 
+      <type arch='x86_64' machine='pc'>hvm</type>
+      <boot dev='cdrom'/>
+   </os> 
+   <features> 
+     <acpi/> 
+     <apic/> 
+     <pae/> 
+   </features> 
+   <clock offset='localtime'/> 
+   <on_poweroff>destroy</on_poweroff> 
+   <on_reboot>restart</on_reboot>   
+   <on_crash>destroy</on_crash> 
+   <devices> 
+     <emulator>/usr/libexec/qemu-kvm</emulator> 
+     <disk type='file' device='disk'> 
+      <driver name='qemu' type='qcow2'/>
+       <source file='/opt/kvm/volumes/centos7.qcow2'/>
+       <target dev='hda' bus='ide'/> 
+     </disk> 
+     <disk type='file' device='cdrom'> 
+       <source file='/root/soft/CentOS-7-x86_64-Minimal-2009.iso'/>
+       <target dev='hdb' bus='ide'/> 
+     </disk> 
+    <interface type='bridge'>
+      <source bridge='br0'/>
+      <mac address="00:16:3e:5d:aa:a8"/>
+    </interface> 
+    <input type='mouse' bus='ps2'/> 
+     <graphics type='vnc' port='5509' autoport='yes' listen = '0.0.0.0' keymap='en-us'/>
+   </devices> 
+</domain> 

kvm/virsh/readme.md

@@ -0,0 +1,4 @@
+# virsh
+kvm 命令行管理工具virsh
+
+# 

linux/centos/kde.md

@@ -0,0 +1,43 @@
+# centos 8 安装kde5
+
+本安装方法适用于 centos8， rockylinux8
+
+kde5 并未包含在系统软件仓库中，需要添加epel源
+
+```bash
+yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
+```
+
+或者
+
+```bash
+dnf install epel-release
+```
+
+使用国内源
+
+```bash
+sed -e 's!^metalink=!#metalink=!g'     -e 's!^#baseurl=!baseurl=!g'     -e 's!//download\.fedoraproject\.org/pub!//mirrors.tuna.tsinghua.edu.cn!g'     -e 's!http://mirrors!https://mirrors!g'     -i /etc/yum.repos.d/epel.repo
+
+sed -e 's!^metalink=!#metalink=!g'     -e 's!^#baseurl=!baseurl=!g'     -e 's!//download\.example/pub!//mirrors.tuna.tsinghua.edu.cn!g'     -e 's!http://mirrors!https://mirrors!g'     -i /etc/yum.repos.d/epel.repo
+```
+
+开启epel-extra包
+
+```bash
+dnf config-manager --set-enabled powertools
+```
+
+安装kde5
+
+```bash
+yum group install 'KDE Plasma Workspaces'
+systemctl set-default graphical.target
+systemctl enable sddm
+```
+
+重启电脑
+
+```bash
+reboot
+```

linux/centos/xrdp.md

@@ -0,0 +1,16 @@
+# CentOS安装xrdp
+
+xrdp需要安装桌面环境。
+
+```bash
+sudo yum group install "Server with GUI"
+```
+
+安装xrdp
+
+```bash
+sudo yum install xrdp
+sudo systemctl enable --now xrdp
+echo 'exec gnome-session' >> /etc/xrdp/xrdp.ini
+sudo systemctl restart xrdp
+```

linux/rocky/install.md

@@ -0,0 +1,10 @@
+# 安装 rocky
+
+## 配置rocky使用国内源
+
+```bash
+sed -e 's|^mirrorlist=|#mirrorlist=|g' \
+    -e 's|^#baseurl=http://dl.rockylinux.org/$contentdir|baseurl=https://mirrors.sjtug.sjtu.edu.cn/rocky|g' \
+    -i.bak \
+    /etc/yum.repos.d/Rocky-*.repo
+```

parser/fluent.css

@@ -0,0 +1,728 @@
+:root {
+    --side-bar-bg-color: #fafafa;
+    --control-text-color: #777;
+    --monospace: "Jetbrains Mono", "思源黑体 CN";
+}
+
+.title-text {
+    font-size: 14px;
+}
+
+body, .title-text {
+    background-color: white;
+    font-family: "Inter", "思源黑体 CN";
+    color: rgb(12, 12, 12);
+    line-height: 1.6;
+}
+
+#write {
+    max-width: 960px;
+    margin: 0 auto;
+    padding: 30px;
+    padding-bottom: 100px;
+}
+
+#write>ul:first-child, #write>ol:first-child {
+    margin-top: 30px;
+}
+
+a.md-inner-link {
+    color: #3b78e7;
+}
+
+h1, h2, h3, h4, h5, h6 {
+    position: relative;
+    margin-top: 1rem;
+    margin-bottom: 1rem;
+    font-weight: 700;
+    line-height: 1.4;
+    cursor: text;
+    font-feature-settings: "tnum";
+}
+
+.md-toc {
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+    line-height: 1.2;
+    margin-top: 1rem;
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+}
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+}
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+}
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+}
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+}
+
+h6 {
+    font-size: 1em;
+}
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+}
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+li>ol, li>ul {
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+}
+
+hr {
+    height: 2px;
+    padding: 0;
+    margin: 16px 0;
+    background-color: #e7e7e7;
+    border: 0 none;
+    overflow: hidden;
+    box-sizing: content-box;
+}
+
+li p.first {
+    display: inline-block;
+}
+
+ul, ol {
+    padding-left: 30px;
+}
+
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+    margin-top: 0;
+}
+
+ul:last-child, ol:last-child {
+    margin-bottom: 0;
+}
+
+a>span>code {
+    color: #3b78e7!important;
+    text-decoration: none!important;
+}
+
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+    border-radius: 4px;
+    padding: 12px 16px;
+    background-color: #f4f7f8;
+    font-family: '思源宋体 CN', serif;
+    color: #252d34;
+}
+
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+    background-color: transparent;
+}
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+}
+
+blockquote blockquote {
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+}
+
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+    word-break: initial;
+}
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+}
+
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+}
+
+table tr th {
+    font-weight: bold;
+    border: 1px solid #dfe2e5;
+    border-bottom: 0;
+    margin: 0;
+    padding: 6px 13px;
+}
+
+table tr td {
+    border: 1px solid #dfe2e5;
+    margin: 0;
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+}
+
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+    margin-top: 0;
+}
+
+table tr th:last-child, table tr td:last-child {
+    margin-bottom: 0;
+}
+
+.CodeMirror-lines {
+    line-height: 1.5rem!important;
+    padding-left: 6px;
+}
+
+.code-tooltip {
+    border-radius: 4px;
+    background-color: white;
+    box-shadow: 0 25.6px 57.6px 0 rgba(0, 0, 0, .22), 0 4.8px 14.4px 0 rgba(0, 0, 0, .18)!important;
+}
+
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+}
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+}
+
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+    color: #d4d4d4;
+    font-weight: inherit;
+    background-color: #d4d4d430;
+    padding-left: 4px;
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+    padding-bottom: 2px;
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+
+.md-fences {
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+    margin-top: 15px;
+    padding-top: 8px;
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+}
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+}
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+}
+
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+    }
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+    }
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+    }
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+    }
+    .page-break {
+        page-break-after: always;
+        break-after: page;
+    }
+    .page-break:before {
+        content: none
+    }
+    code {
+        font-variant-ligatures: common-ligatures!important;
+    }
+}
+
+.page-break:before {
+    background-color: #05685b;
+}
+
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+    content: "Page Break"
+}
+
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+}
+
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+}
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+} */
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+}
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+}
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+}
+
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+}
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+}
+
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+}
+
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+}
+
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+}
+
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+}
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+}
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+}
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+
+.md-image>.md-meta {
+    /*border: 1px solid #ddd;*/
+    border-radius: 3px;
+    padding: 2px 0px 0px 4px;
+    font-size: 0.9em;
+    color: inherit;
+}
+
+.md-tag {
+    color: #a7a7a7;
+    opacity: 1;
+}
+
+.md-toc {
+    margin-top: 20px;
+    padding-bottom: 20px;
+}
+
+.sidebar-tabs {
+    border-bottom: none;
+}
+
+#typora-quick-open {
+    border: 1px solid #ddd;
+    background-color: #f8f8f8;
+}
+
+#typora-quick-open-item {
+    background-color: #FAFAFA;
+    border-color: #FEFEFE #e5e5e5 #e5e5e5 #eee;
+    border-style: solid;
+    border-width: 1px;
+}
+
+/** focus mode */
+
+.on-focus-mode blockquote {
+    border-left-color: rgba(85, 85, 85, 0.12);
+}
+
+header, .context-menu, .megamenu-content, footer {
+    font-family: "Inter", "思源黑体 CN";
+}
+
+.file-node-content:hover .file-node-icon, .file-node-content:hover .file-node-open-state {
+    visibility: visible;
+}
+
+.mac-seamless-mode #typora-sidebar {
+    background-color: #fafafa;
+    background-color: var(--side-bar-bg-color);
+}
+
+.md-lang {
+    color: #b4654d;
+}
+
+.html-for-mac .context-menu {
+    --item-hover-bg-color: #E6F0FE;
+}
+
+#md-notification .btn {
+    border: 0;
+}
+
+.dropdown-menu .divider {
+    border-color: #e5e5e5;
+}
+
+.ty-preferences .window-content {
+    background-color: #fafafa;
+}
+
+.ty-preferences .nav-group-item.active {
+    color: white;
+    background: #00000010;
+}
+
+.CodeMirror-linenumber {
+    color: rgba(20, 20, 20, 0.3);
+}
+
+.CodeMirror-gutters {
+    border-right: none;
+    /* border-right: 1.08px solid rgba(20, 20, 20, 0.3); */
+}
+
+.context-menu {
+    border: none!important;
+    backdrop-filter: saturate(180%) blur(20px) brightness(1.1);
+    background-color: #ffffffd0;
+    box-shadow: 0 25.6px 57.6px 0 rgba(0, 0, 0, .22), 0 4.8px 14.4px 0 rgba(0, 0, 0, .18)!important;
+}
+
+.divider {
+    background-color: #00000020!important;
+    border: none!important;
+}
+
+.ty-footer, .sidebar-footer {
+    backdrop-filter: saturate(180%) blur(20px) brightness(1.1);
+    border: none!important;
+    background: none;
+    background-color: #ffffff70;
+    box-shadow: 0 25.6px 57.6px 0 rgba(0, 0, 0, .22), 0 4.8px 14.4px 0 rgba(0, 0, 0, .18);
+}
+
+#sidebar-files-menu {
+    border-radius: 4px;
+    border: none!important;
+    background-color: #ffffff;
+    box-shadow: 0 25.6px 57.6px 0 rgba(0, 0, 0, .22), 0 4.8px 14.4px 0 rgba(0, 0, 0, .18);
+}
+
+@media (min-width: 1000px) {
+    footer.ty-footer {
+        background-color: #ffffff70;
+        border: none!important;
+        right: 0!important;
+        backdrop-filter: saturate(180%) blur(20px) brightness(1.1);
+    }
+}
+
+@media (max-width: 1000px) {
+    footer.ty-footer {
+        background-color: #ffffff70;
+        border: none!important;
+        backdrop-filter: saturate(180%) blur(20px) brightness(1.1);
+        box-shadow: 0 25.6px 57.6px 0 rgba(0, 0, 0, .22), 0 4.8px 14.4px 0 rgba(0, 0, 0, .18);
+    }
+}
+
+.code-tooltip.md-tooltip-hide.md-hover-tip {
+    box-shadow: 0 25.6px 57.6px 0 rgba(0, 0, 0, .22), 0 4.8px 14.4px 0 rgba(0, 0, 0, .18);
+}
+
+.md-rawblock-control.md-rawblock-after {
+    margin-bottom: 12px;
+}
+
+#typora-sidebar {
+    background-color: #fafafa!important;
+    border: none!important;
+    box-shadow: 0 6.4px 14.4px 0 rgba(0, 0, 0, .132), 0 1.2px 3.6px 0 rgba(0, 0, 0, .108)!important;
+}
+
+.file-node-title {
+    color: #0f0f0f;
+}
+
+#footer-word-count-info, #spell-check-panel {
+    border: none!important;
+    background-color: #ffffff!important;
+    box-shadow: 0 25.6px 57.6px 0 rgba(0, 0, 0, .22), 0 4.8px 14.4px 0 rgba(0, 0, 0, .18)!important;
+}
+
+content {
+    bottom: 4px;
+}
+
+@font-face {
+    font-family: 'FontAwesome2';
+    src: url('fluent/fontawesome-webfont.eot?v=4.7.0');
+    src: url('fluent/fontawesome-webfont.eot?#iefix&v=4.7.0') format('embedded-opentype'), url('fluent/fontawesome-webfont.woff2?v=4.7.0') format('woff2'), url('fluent/fontawesome-webfont.woff?v=4.7.0') format('woff'), url('fluent/fontawesome-webfont.ttf?v=4.7.0') format('truetype'), url('fluent/fontawesome-webfont.svg?v=4.7.0#fontawesomeregular') format('svg');
+    font-weight: normal;
+    font-style: normal;
+}
+
+blockquote>h4, blockquote>h5, blockquote>h6 {
+    font-size: 1em;
+    columns: inherit;
+}
+
+blockquote>h4::before {
+    width: 24px;
+    content: "\f097";
+    display: inline-block;
+    font: normal normal normal 14px/1 FontAwesome2;
+    font-size: 1em;
+    text-rendering: auto;
+    -webkit-font-smoothing: antialiased;
+    -moz-osx-font-smoothing: grayscale;
+}
+
+blockquote>h5::before {
+    width: 32px;
+    content: "e.g.";
+    display: inline-block;
+    font-style: italic;
+    font-size: 1.2em;
+    text-rendering: auto;
+    -webkit-font-smoothing: antialiased;
+    -moz-osx-font-smoothing: grayscale;
+    opacity: 0.5;
+}
+
+blockquote>h6::before {
+    width: 24px;
+    content: "\f27b";
+    display: inline-block;
+    font: normal normal normal 14px/1 FontAwesome2;
+    font-size: 1em;
+    text-rendering: auto;
+    -webkit-font-smoothing: antialiased;
+    -moz-osx-font-smoothing: grayscale;
+    columns: inherit;
+}
+
+.ol-list {
+    border: 1px solid rgb(238, 238, 238);
+    border-radius: 4px;
+    padding-top: 12px;
+    padding-bottom: 12px;
+    padding-right: 12px;
+}
+
+.MetaInfo-Author {
+    opacity: 0.6;
+    margin-top: -6px
+}
+
+.MetaInfo-Deadline {
+    display: none;
+    opacity: 0
+}
+
+.cm-keyword, .cm-variable-3, .cm-tag {
+    color: #3b78e7!important
+}
+
+.cm-def, .cm-attribute {
+    color: #9c27b0!important
+}
+
+.cm-comment {
+    color: #d81b60!important;
+    font-style: oblique!important;
+    font-variant-ligatures: common-ligatures!important;
+    font-variation-settings: 'slnt' -9;
+}
+
+.cm-string {
+    color: #0d904f!important;
+    font-style: italic!important;
+    font-variant-ligatures: common-ligatures!important;
+}
+
+.cm-tag:not(.cm-bracket) {
+    font-weight: 700;
+}
+
+.cm-operator {
+    color: #d81b60!important;
+}
+
+.cm-number {
+    color: #d81b60!important;
+}
+
+.cm-meta {
+    color: #9c27b0!important;
+    font-weight: 700!important;
+}
+
+.cm-builtin {
+    font-style: italic!important;
+}
+
+.file-tree-node.active>.file-node-background {
+    background-color: var(--active-file-bg-color);
+    border-left: 4px solid #3b78e7!important;
+    border-color: #3b78e7!important;
+    background-color: #3b78e718!important;
+}

parser/go.mod

@@ -0,0 +1,5 @@
+module blog.bing89.com/parser
+
+go 1.16
+
+require github.com/gomarkdown/markdown v0.0.0-20210208175418-bda154fe17d8

parser/go.sum

@@ -0,0 +1,3 @@
+github.com/gomarkdown/markdown v0.0.0-20210208175418-bda154fe17d8 h1:nWU6p08f1VgIalT6iZyqXi4o5cZsz4X6qa87nusfcsc=
+github.com/gomarkdown/markdown v0.0.0-20210208175418-bda154fe17d8/go.mod h1:aii0r/K0ZnHv7G0KF7xy1v0A7s2Ljrb5byB7MO5p6TU=
+golang.org/dl v0.0.0-20190829154251-82a15e2f2ead/go.mod h1:IUMfjQLJQd4UTqG1Z90tenwKoCX93Gn3MAQJMOSBsDQ=

parser/main.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+
+	"github.com/gomarkdown/markdown"
+	"github.com/gomarkdown/markdown/html"
+	"github.com/gomarkdown/markdown/parser"
+)
+
+func main(){
+	file, err := os.Open("test.md")
+	if err != nil {
+		panic(err)
+	}
+	defer file.Close()
+	data, err := ioutil.ReadAll(file)
+	if err != nil {
+		panic(err)
+	}
+	htmlFlags := html.CommonFlags | html.HrefTargetBlank | html.CompletePage
+	var extensions = parser.NoIntraEmphasis |
+		parser.Tables |
+		parser.FencedCode |
+		parser.Autolink |
+		parser.Strikethrough |
+		parser.SpaceHeadings
+	opts := html.RendererOptions{
+		Flags: htmlFlags, 
+		CSS: "http://www.bing89.com/css/markdown/fluent.css",
+	}
+	renderer := html.NewRenderer(opts)
+	parser := parser.NewWithExtensions(extensions)
+	html := markdown.ToHTML(data, parser, renderer)
+	fmt.Println(string(html))
+}

parser/test.html

@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title></title>
+  <meta name="GENERATOR" content="github.com/gomarkdown/markdown markdown processor for Go">
+  <meta charset="utf-8">
+  <link rel="stylesheet" type="text/css" href="http://www.bing89.com/css/markdown/fluent.css">
+</head>
+<body>
+
+<h1>this is a test</h1>
+
+<p>this is a test</p>
+
+<h2>test subtitle</h2>
+
+<pre><code class="language-c++">#include &lt;iostream&gt;
+using namespace std;
+int main(){
+    cout&lt;&lt;&quot;helloworld!&quot;
+    return 0
+}
+</code></pre>
+
+<p><a href="main.go" target="_blank">this is a test link</a></p>
+
+</body>
+</html>
+

parser/test.md

@@ -0,0 +1,16 @@
+# this is a test
+
+this is a test
+
+## test subtitle
+
+```c++
+#include <iostream>
+using namespace std;
+int main(){
+    cout<<"helloworld!"
+    return 0
+}
+```
+
+[this is a test link](main.go)