1、卸载docker
- 如果docker卸载不干净,那么在后期安装docker后启动docker会失败,出现Failed to restart docker.service: Unit not found.
运行如下命令,卸载docker
yum -y remove docker docker-common docker-selinux docker-engine
2、安装docker
1、安装docker运行环境
yum -y install gcc
yum -y install gcc-c++
2、安装储存库
sudo yum install -y yum-utils \
device-mapper-persistent-data \
lvm2
3、设置镜像仓库
sudo yum-config-manager \
--add-repo \
https://download.docker.com/linux/centos/docker-ce.repo
4、更新索引
yum makecache fast
5、安装 DOCKER CE
sudo yum install docker-ce
6、启动docker
systemctl enable docker #加入服务中,有的不需要
systemctl start docker #启动docker
7、测试下
https://www.runoob.com/docker/docker-install-nginx.html