How to uninstall and reinstall docker

Specific steps:

(Recommended video tutorial: Docker video tutorial)

Uninstall the old version of docker before reinstalling

rpm list installed|grep docker

Or use this command

rpm -qa|grep docker //查看已经安装的docker安装包,列出入校内容
docker.x86_64 2:1.12.6-16.el7.centos @extras 
docker-client.x86_64 2:1.12.6-16.el7.centos @extras 
docker-common.x86_64 2:1.12.6-16.el7.centos @extra

Delete respectively

yum -y remove docker.x86_64
yum -y remove docker-client.x86_64
yum -y remove docker-common.x86_64

Delete the docker image

rm -rf /var/lib/docker

Reinstall

yum update //确保yum包最新

yum install -y yum-utils

(recommended related tutorials: docker tutorial)

Check whether there is device-mapper-persistent-data package (rpm -qa|grep device-mapper-persistent-data, if so) There is no need to install it). If it is not installed, execute the command:

yum install -y device-mapper-persistent-data

to check whether there is lvm2 package (rpm -qa|grep lvm2, if there is, there is no need to install it). If it is not installed, execute the command :

yum install -y lvm2

yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo //注意,以上为设置yum源,从Docker官方地址下载安装包
yum list docker-ce --showduplicates | sort -r //查看仓库中所有的docker版本
yum install docker-ce(默认安装)或 yum install docker-ce-17.12.0.ce(注:17.12.0是版本号,可根据列表选择)

Set docker to automatically start and start services after booting up

[root@localhost softs]# systemctl enable docker
[root@localhost softs]# systemctl start docker

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