centos7安装docker
1、检查环境
1.1 查看CentOS版本
cat /etc/system-release
CentOS Linux release 7.3.1611 (Core)
1.2 查看内核版本(需高于3.10
uname -r
3.10.0-514.el7.x86_64
2、更新yum包(需root权限
sudo yum -y update
3、卸载旧版本(如果安装过旧版本的话)
sudo yum remove docker docker-common docker-selinux docker-engine
4、安装需要的软件包 yum-util。提供yum-config-manager功能,另外两个是devicemapper驱动依赖的
sudo yum -y install -y yum-utils device-mapper-persistent-data lvm2
5.在线安装
5.1、设置yum源
sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
Loaded plugins: fastestmirror, langpacks
adding repo from: https://download.docker.com/linux/centos/docker-ce.repo
grabbing file https://download.docker.com/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo
repo saved to /etc/yum.repos.d/docker-ce.repo
5.2、可以查看所有仓库中所有docker版本,并选择特定版本安装
yum list docker-ce --showduplicates | sort -r
* updates: mirrors.tuna.tsinghua.edu.cn
Loading mirror speeds from cached hostfile
Loaded plugins: fastestmirror, langpacks
* extras: mirrors.tuna.tsinghua.edu.cn
docker-ce.x86_64 18.06.1.ce-3.el7 docker-ce-stable
docker-ce.x86_64 18.06.0.ce-3.el7 docker-ce-stable
docker-ce.x86_64 18.03.1.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 18.03.0.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 17.