docker简单示例

参考链接:https://www.cnblogs.com/zhuyunbk/p/11661033.html

docker 简单示例

docker 安装

sudo apt update

sudo apt install -y docker.io

切换国内源(没试过)

切换成国内源，不然下载镜像很慢，例如个人切换成阿里的镜像源地址（去官网https://cn.aliyun.com/ 注册一下会有给一个源地址，下面这个是我申请的）

或者使用网易加速："registry-mirrors": ["http://hub-mirror.c.163.com"]

sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://li8f2khr.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker

sudo docker pull nginx 从远程仓库下载nginx镜像

=sudo docker pull nginx:latest 可以指定版本

sudo docker run -d -p 80:80 nginx 启动后台外部端口:内部端口
sudo docker ps 看现在正在运行的容器

root@ubuntu:/home/likang/Desktop# docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                NAMES
0e9855777157        nginx               "nginx -g 'daemon of…"   12 minutes ago      Up 12 minutes       0.0.0.0:80->80/tcp   heuristic_golick

sudo docker exec -it 0e bash 进到容器里更改内容

root@ubuntu:/home/likang/Desktop# docker exec -it 0e bash
root@0e9855777157:/# cd /usr/share/nginx/html/
root@0e9855777157:/usr/share/nginx/html# ls
50x.html  index.html
root@0e9855777157:/usr/share/nginx/html# cat index.html 
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
    body {
         35em;
        margin: 0 auto;
        font-family: Tahoma, Verdana, Arial, sans-serif;
    }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>

<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>

<p><em>Thank you for using nginx.</em></p>
</body>
</html>
root@0e9855777157:/usr/share/nginx/html# echo hello > index.html 
root@0e9855777157:/usr/share/nginx/html# cat index.html 
hello

sudo docker commit 0e m1 将容器保存为镜像

likang@ubuntu:~/Desktop$ sudo docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
nginx               latest              602e111c06b6        9 days ago          127MB
hello-world         latest              bf756fb1ae65        4 months ago        13.3kB