centos7.9安装docker

官网

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https://docs.docker.com/engine/install/centos/

查看系统环境

[root@ecs-140051 ~]# uname -r
3.10.0-1160.53.1.el7.x86_64
[root@ecs-140051 ~]# cat /etc/os-release 
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"

CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"

安装gcc环境

yum -y install gcc
yum -y install gcc-c++

卸载docker旧版

yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-engine

安装需要的软件包

yum install -y yum-utils

设置镜像仓库

# 使用阿里云镜像库
yum-config-manager --add-repo http://mirrors.aliyun.com/dockerce/linux/centos/docker-ce.repo

更新yum软件包索引

yum makecache fast

安装 Docker CE

yum install docker-ce docker-ce-cli containerd.io

启动 Docker

systemctl start docker

查看docker运行状态

[root@ecs-140051 ~]# systemctl status docker

测试

docker version

docker run hello-world

卸载

systemctl stop docker
yum -y remove docker-ce docker-ce-cli containerd.io
rm -rf /var/lib/docker