docker.md

Docker 安装

1. 查看当前是否已安装Docker

rpm -aq | grep docker

2. 安装Docker源

curl -o /etc/yum.repos.d/docker-ce.repo  https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo?spm=a2c6h.25603864.0.0.29d84ca5jvb9YX

3. 查看可用Docker版本

yum list docker-ce --showduplicates |sort -r

4. 安装

yum install docker-ce-19.03.15-3.el7.x86_64

5. 配置文件

mkdir /etc/docker
cat >/etc/docker/daemon.json <<EOF
{
  "registry-mirrors":["https://registry.docker-cn.com","https://docker.mirrors.ustc.edu.cn"],
  "exec-opts": ["native.cgroupdriver=systemd"]
}
EOF

6. 重启并配置开机自启

systemctl restart docker
systemctl enable docker

7. 卸载

yum remove docker-ce-19.03.15-3.el7.x86_64

Docker 清理

若创建容器时报错如下,则Docker磁盘空间不足

Failed to create pod sandbox: rpc error: code = Unknown desc = failed to create a sandbox for pod "csi-node-5n8tg": Error response from daemon: devmapper: Thin Pool has 53522 free data blocks which is less than minimum required 163840 free data blocks. Create more free space in thin pool or use dm.min_free_space option to change behavior

#查看Docker详情
docker info

清理

#删除关闭的容器
docker ps -a | grep Exit | cut -d ' ' -f 1 | xargs docker rm
#删除没有Tag的镜像
docker rmi $(docker images | grep "^<none>" | awk "{print $3}")
#删除dangling Volume
docker volume rm $(docker volume ls -qf dangling=true)
#或者使用以下命令清理，将删除当前不在运行的所有镜像容器网络volume
docker system prune