k8s部署go项目

1.工程目录结构

2.先添加一个简单的golang服务

main.go

package main

import (
    "flag"
    "net/http"
    "os"
    "github.com/gin-gonic/gin"
)

var version = flag.String("v", "v1", "v1")

func main() {
    router := gin.Default()

    router.GET("", func(c *gin.Context) {
        flag.Parse()
        hostname, _ := os.Hostname()

        c.String(http.StatusOK, "This is version:%s running in pod %s", *version, hostname)
    })

    router.Run(":8080")
}

3.在终端执行如下命令

go mod init test #给工程创建一个go mod 管理工程
go get github.com/gin-gonic/gin #下载包
go build main.go #编译mian.go

4.编写Dockerfile

FROM golang:latest AS build
 
WORKDIR /test
COPY . /test
RUN go env -w GOPROXY=https://goproxy.cn,direct
RUN CGO_ENABLED=0 go build -v -o main .
 
FROM alpine AS api
RUN mkdir /app
COPY --from=build /test/main /app
WORKDIR /app
ENTRYPOINT ["./main", "-v" ,"1.3"]

5.构建docker镜像并保存为tar包

docker build  -t go:v1.3 . 
docker tag go:v1.3 foxliang/go:v1.3
docker save foxliang/go -o  foxliang2.tar

6.将镜像导入containerd中

ctr -n k8s.io i import foxliang2.tar

7.将镜像通过yaml部署到k8s（编写test.yaml）

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: go-deployment
  labels:
    app: go
spec:
  selector:
    matchLabels:
      app: go
  replicas: 3
  minReadySeconds: 5
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 1
  template:
    metadata:
      labels:
        app: go
    spec:
      containers:
      - image: foxliang/go:v1.3
        name: go
        imagePullPolicy: Always
        command: ["./main","-v","v1.3"]
        ports:
        - containerPort: 8080
          protocol: TCP
---
apiVersion: v1
kind: Service
metadata:
  name: go-service
  labels:
    app: go
spec:
  selector:
    app: go
  ports:
    - name: go-port
      protocol: TCP
      port: 8080
      targetPort: 8080
      nodePort: 31080
  type: NodePort

8.部署

 kubectl create -f test.yaml

9.查看pod状态

[root@node-2 ~]#  kubectl get pod -o wide
NAME                             READY   STATUS    RESTARTS   AGE   IP             NODE     NOMINATED NODE   READINESS GATES
go-deployment-769587fc8b-76p6c   1/1     Running   0          44m   10.232.4.243   node-8   <none>           <none>
go-deployment-769587fc8b-m22jm   1/1     Running   0          44m   10.232.5.65    node-5   <none>           <none>
go-deployment-769587fc8b-mthhh   1/1     Running   0          44m   10.232.3.108   node-4   <none>           <none>

10.在浏览器访问服务

http://nodeIP:31080/

参考博客：