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pod

pod和container的区别​

pod 可以管理多个 container

所以自然 pod 可以管理多个 container

启动pod

# nginx.yaml
apiVersion: v1
kind: Pod
metadata:
  name: nginx-pod
spec:
  containers:
    - name: nginx-container
      image: nginx

kubectl apply -f nginx.yaml 启动

kubectl get pods 来查看 pod 是否正常启动

kubectl port-forward nginx-pod 4000:80 命令将 nginx 默认的 80 端口映射到本机的 4000 端

kubectl exec -it nginx-pod /bin/bash 可以用来进入 Pod 内容器的 Shell

编写hello go服务​

package main

import (
    "io"
    "net/http"
)

func hello(w http.ResponseWriter, r *http.Request) {
    io.WriteString(w, "[v1] Hello, Kubernetes!")
}

func main() {
    http.HandleFunc("/", hello)
    http.ListenAndServe(":3000", nil)
}
# Dockerfile
FROM golang:1.16-buster AS builder
RUN mkdir /src
ADD . /src
WORKDIR /src

RUN go env -w GO111MODULE=auto
RUN go build -o main .

FROM gcr.io/distroless/base-debian10

WORKDIR /

COPY --from=builder /src/main /main
EXPOSE 3000
ENTRYPOINT ["/main"]

buid image by docker build . -t guangzhengli/hellok8s:v1

start by container docker run -p 3000:3000 --name hellok8s -d guangzhengli/hellok8s:v1

运行成功后，可以通过浏览器或者 curl 来访问 http://127.0.0.1:3000 , 查看是否成功返回字符串 [v1] Hello, Kubernetes!。