docker安装

1.安装JDK

yum install java-11-openjdk.x86_64

2.安装必要工具

yum install -y yum-utils device-mapper-persistent-data lvm2

3.添加软件安装源

yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

4.更新yum缓存

yum makecache fast

5.安装docker-ce

yum -y install docker-ce

如果安装报以下错误，则需要更新containerd

dnf install https://download.docker.com/linux/centos/7/x86_64/stable/Packages/containerd.io-1.2.6-3.3.el7.x86_64.rpm

6.启动 Docker 后台服务

systemctl start docker

7.测试

docker run hello-world

8.设置开机自启

systemctl enable docker

cp /usr/lib/systemd/system/docker.service /etc/systemd/system/

systemctl daemon-reload

systemctl restart docker