Docker學習

https://docs.docker.com/compose/gettingstarted/

 

1.根據機器架構下載

[centos@centos7 ~]$ uname -s

Linux

主機名

uname -n

[centos@centos7 ~]$ uname -m

x86_64

 

https://github.com/docker/compose/releases/

 

2.授權

sudo chmod +x /usr/local/bin/docker-compose

 

運行

docker-compose --version

 

3.安装 Docker CE

# 安装工具包从而可以让我们在 yum 中添加别的仓储源 sudo yum install -y yum-utils device-mapper-persistent-data lvm2 # 设置 docker ce 的稳定库地址 sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo # 安装 docker ce sudo yum install docker-ce docker-ce-cli containerd.io

 

4.運行 Docker

[centos@centos7 usr]$ /usr/bin/docker -v

Docker version 20.10.8, build 3967b7d

[centos@centos7 ~]$ docker info

Docker Root Dir: /var/lib/docker

 

5.启动 docker

systemctl start docker

# 启动 Docker 服务并允许开机自启 sudo systemctl start docker # 查看当前 dokcer 的运行情况 sudo systemctl status docker

將用戶加入docker組

查看/var/run/docker.sock權限

ps -l

將用戶加入docker組

sudo gpasswd -a centos docker

更新docker組

newgrp docker

docker ps #测试docker命令是否可以使用sudo正常使用

docker version

docker info

 

6.運行

[centos@centos7 run]$ docker run hello-world

docker: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?.

service docker restart

查看docker狀態

systemctl status docker

 

7.daemon配置文件

sudo chmod +777 /etc/docker/daemon.json

sudo chmod +777 -R /var/lib/docker

cat /etc/docker/daemon.json

 

8.docker run python

docker run -it python:3.7 bash

 

9.Clean up space used by Docker

docker system prune -a

docker volumes prune