docker部署简单的go web http服务

目录

安装docker

启动docker服务

准备代码

新建Dockerfile

编译Dockerfile

查看刚刚生成的镜像

运行容器

查看运行的容器

查看容器日志

进入容器

查看容器内部的目录结构

停止容器

设置容器的restart policy

对已经跑起来的容器挂载文件

安装docker

https://www.runoob.com/docker/ubuntu-docker-install.html

启动docker服务

https://www.runoob.com/docker/ubuntu-docker-install.html

准备代码

新建项目:demo

在demo下新建app目录，app下新建main.go

package main
import (
    "fmt"
    "log"
    "net/http"
)

func sayHello(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintln(w, "hello world")
}

func main() {
    http.HandleFunc("/", sayHello)
    log.Println("server start...")
    if err := http.ListenAndServe("0.0.0.0:80", nil); err != nil {
        log.Fatal("server start err:" + err.Error())
    }
}

           

在demo下新建script目录，在script下新建build.sh

#!/usr/bin/env bash
cd /go/src/app/ && ./main
           

新建Dockerfile

FROM golang
MAINTAINER katy
WORKDIR /go/src/
COPY . .
# 暴露容器端口，与程序代码里面开启的端口一致
EXPOSE 80
CMD ["/bin/bash", "/go/src/script/build.sh"]
           

编译Dockerfile

docker build -f Dockerfile -t go-web .
           

查看刚刚生成的镜像

docker ps 

REPOSITORY          TAG                 IMAGE ID            CREATED            SIZE
go-web              latest              bc4bb4bb841a        40 minutes ago     821M
           

运行容器

// -p参数：指定端口映射，格式为：主机(宿主)端口:容器端口
// 将Dockerfile里面暴露的端口80映射到127.0.0.1:8080上
docker run -p 127.0.0.1:8080:80 bc4bb4bb841a
           

查看运行的容器

docker ps

CONTAINER ID        IMAGE               COMMAND                  CREATED            STATUS              PORTS                    NAMES
99f2cf4efeb3        bc4bb4bb841a        "/bin/bash /go/src..."   19 minutes ago     Up 19 minutes       127.0.0.1:8080->80/tcp   nostalgic_lewin
           

查看容器日志

// docker logs 用法
/* Usage:  docker logs [OPTIONS] CONTAINER

Fetch the logs of a container

Options:
      --details        Show extra details provided to logs
  -f, --follow         Follow log output
      --help           Print usage
      --since string   Show logs since timestamp
      --tail string    Number of lines to show from the end of the logs (default "all")
  -t, --timestamps     Show timestamps
*/
docker logs -f 99f2cf4efeb3
           

进入容器

/*
docker exec用法
 docker exec [OPTIONS] CONTAINER COMMAND [ARG...]

Run a command in a running container

Options:
  -d, --detach               Detached mode: run command in the background
      --detach-keys string   Override the key sequence for detaching a container
  -e, --env list             Set environment variables (default [])
      --help                 Print usage
  -i, --interactive          Keep STDIN open even if not attached
      --privileged           Give extended privileges to the command
  -t, --tty                  Allocate a pseudo-TTY
  -u, --user string          Username or UID (format: <name|uid>[:<group|gid>])
*/

// 查看该容器的pwd信息
docker exec -it 99f2cf4efeb3 pwd
           

查看容器内部的目录结构

// docker exec -it 容器id /bin/bash
docker exec -it db4d36ba98ab /bin/bash

[[email protected] demo]# docker exec -it db4d36ba98ab /bin/bash
r[email protected]:/go/src# ls
Dockerfile  README.md  app  script
           

停止容器

// docker stop 容器id
docker stop 99f2cf4efeb3
           

设置容器的restart policy

如果没有指定restart policy，默认为no。

https://docs.docker.com/config/containers/start-containers-automatically/

在docker run 的时候指定restart policy

docker run --restart always ...
           

针对已经存在的容器，可以通过

docker update --restart=unless-stopped container_name
           

对已经跑起来的容器挂载文件

docker cp /root/init.sh   容器名:/dst .