本篇应用的goweb demo，页面很简略，性能也是很简略，写代码不是本篇的重点，重点是先体验一下整个流程：开发环境筹备、写代码、提交到仓库、拉取代码构建并打包镜像、推送到镜像仓库，部署到K8S。
本篇的分享分为上篇和下篇，上篇是手动，打算在下篇再讲主动。只有手动体验过，能力更能深刻的了解外面的流程、细节，前面再把这个流程革新为全程自动化就是信手拈来的事件。如果连手工部署都跑不通，还想谈自动化呢？如果是在企业里，谈自动化之前还得先把标准化流程给落实了，再来谈自动化。
golang开发环境筹备
- 下载golang二进制包
wget https://golang.google.cn/dl/go1.19.3.linux-amd64.tar.gztar -zxf go1.19.3.linux-amd64.tar.gz mv go /usr/local/- 在/etc/profile配置环境变量
export GOROOT="/usr/local/go"export GOPATH="/data/project/gocode"export GOPROXY="https://goproxy.cn,direct"export GO111MODULE="on"export PATH=$PATH:$GOROOT/bin:$GOPATH# 使其失效source /etc/profileGOPROXY示意的是go的代理设置，当主动下载第三方代码的库地址时，go默认是国外下载，所以配置代理，加快速度，国内个别应用七牛云的goproxy.cn
- 进入$GOPATH创立src、pkg、bin目录
[root@workhost ~]# cd $GOPATH[root@workhost gocode]# mkdir bin pkg src写代码
- 一个简略的我的项目构造
[root@workhost goweb]# tree.├── go.mod├── main.go├── README.md└── static └── login.html- 写一个简略的前端页面
static/login.html
<!DOCTYPE html><html lang="zh-CN"> <head> <title>不背锅运维</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet"> <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script> </head><body class="bg-dark bg-opacity-76"><div class="container vh-100"> <div class="row vh-100"> <div class="col-4 m-auto p-5 justify-content-center bg-white rounded"> <form action="/login" method="post"> <div class="mb-3"> <label class="form-label mb-1 text-black-50">用户名：</label> <input type="text" class="form-control" name="account"> </div> <div class="mb-4"> <label class="form-label mb-1 text-black-50">明码：</label> <input type="password" class="form-control" name="password"> </div> <div class="mb-1"> <button type="submit" class="form-control btn-primary">登录</button> </div> </form> <div class="container mt-3 justify-content-center"> <div class="container"> <p class="text-danger">{{.Msg}}</p> </div> </div> </div> </div></div></body></html>- 后端代码
main.go
package mainimport ( "log" "net/http" "text/template")type Message struct { Msg string}func home(w http.ResponseWriter, r *http.Request) { if r.Method == "GET" { w.Header().Set("Location", "/login") w.WriteHeader(http.StatusFound) }}func login(w http.ResponseWriter, r *http.Request) { t, _ := template.ParseFiles("./static/login.html") if r.Method == "GET" { t.Execute(w, nil) } else { r.ParseForm() account := r.Form["account"][0] userPwd := r.Form["password"][0] if account == "tantianran" { if userPwd == "1qaz#EDC" { msg := Message{Msg: "祝贺！验证通过O(∩_∩)O"} t.Execute(w, msg) } else { msg := Message{Msg: "明码谬误..."} t.Execute(w, msg) } } else { msg := Message{Msg: "用户名谬误..."} t.Execute(w, msg) } }}func main() { http.HandleFunc("/", home) http.HandleFunc("/login", login) listenAddr := ":80" log.Println("ListenAndserve", listenAddr) err := http.ListenAndServe(listenAddr, nil) if err != nil { log.Println(err) }}- 看看页面成果
- 提交到gitab
git add .git commit -m "add code"git push编译和打包镜像
- 编译
[root@workhost src]# git clone http://192.168.11.254:8088/tantianran/goweb.git^C[root@workhost src]# cd goweb/[root@workhost goweb]# go build main.go - 编写Dockerfile
这个 Dockerfile 的作用是将一个 Golang Web 应用程序打包为一个 Docker 镜像，使其能够在 Docker 容器中运行并通过 80 端口对外提供服务。
FROM golang:latestWORKDIR /appCOPY static /app/staticCOPY main /appEXPOSE 80CMD ["./main"]指令解释：
- 开始构建镜像
依据 Dockerfile 构建一个 Docker 镜像并给镜像打上标签。
docker build -t 192.168.11.254:8081/webdemo/goweb:20230427v1 . - 启动容器
docker run -d -it --name goweb -p 8090:80 192.168.11.254:8081/webdemo/goweb:20230427v1- 拜访
- 推送到公有仓库
确保镜像没问题之后，推送到Harbor
docker push 192.168.11.254:8081/webdemo/goweb:20230427v1装置ingress-nginx
这里我打算应用ingress的形式来裸露利用，应用比拟支流的ingress-nginx。
- 部署ingress-nginx
因为是内网的K8S测试集群，为了可能疾速测试，以下deploy.yaml中裸露Controller的形式是应用NodePort，这种形式实用于简直所有的集群，但通常会应用30000-32767范畴内的端口。
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.7.0/deploy/static/provider/baremetal/deploy.yaml- 部署完后查看：
tantianran@k8s-b-master:~/nginx-ingress$ kubectl get pod,svc -n ingress-nginxNAME READY STATUS RESTARTS AGEpod/ingress-nginx-admission-create-6fp24 0/1 Completed 0 9m54spod/ingress-nginx-admission-patch-nvtjv 0/1 Completed 0 9m54spod/ingress-nginx-controller-6b87568f97-kpms9 1/1 Running 0 9m54sNAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGEservice/ingress-nginx-controller NodePort 10.96.106.100 <none> 80:31179/TCP,443:30701/TCP 9m55sservice/ingress-nginx-controller-admission ClusterIP 10.106.222.181 <none> 443/TCP 9m55stantianran@k8s-b-master:~/nginx-ingress$ 手工部署到K8S
- 部署Deployment、Service以及创立Ingress规定
apiVersion: apps/v1kind: Deploymentmetadata: labels: app: goweb name: gowebspec: replicas: 1 selector: matchLabels: app: goweb template: metadata: labels: app: goweb spec: containers: - image: 192.168.11.254:8081/webdemo/goweb:20230427v1 name: goweb---apiVersion: v1kind: Servicemetadata: labels: app: goweb name: gowebspec: ports: - name: http-port port: 5678 protocol: TCP targetPort: 80 selector: app: goweb type: ClusterIP---apiVersion: networking.k8s.io/v1kind: Ingressmetadata: name: gowebspec: ingressClassName: nginx rules: - host: "test.goweb.com" http: paths: - path: / pathType: Prefix backend: service: name: goweb port: number: 5678- 部署实现后查看
tantianran@k8s-b-master:~/goweb$ kubectl get svc,pod,ingressNAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGEservice/goweb ClusterIP 10.111.92.32 <none> 5678/TCP 2m4sservice/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 23hNAME READY STATUS RESTARTS AGEpod/goweb-57c44c897d-frxf6 1/1 Running 0 2m4spod/nfs-client-provisioner-6685d955d-p9w57 1/1 Running 1 (12m ago) 12hNAME CLASS HOSTS ADDRESS PORTS AGEingress.networking.k8s.io/goweb nginx test.goweb.com 192.168.11.101 80 2m4stantianran@k8s-b-master:~/goweb$ - 增加域名映射
举荐大家应用SwitchHosts工具来治理hosts，不便日常测试。
- 测试拜访
本文转载于WX公众号：不背锅运维（喜爱的盆友关注咱们）：https://mp.weixin.qq.com/s/YGhndR5zR-Ebf8IaKbFZiQ