centos7 安装 卸载docker

使用yum安装
sudo tee /etc/yum.repos.d/docker.repo <<-'EOF'
[dockerrepo]
name=Docker Repository
baseurl=https://yum.dockerproject.org/repo/main/centos/7/
enabled=1
gpgcheck=1
gpgkey=https://yum.dockerproject.org/gpg
EOF
Install the Docker package.
$ sudo yum install docker-engine
Start the Docker daemon.
$ sudo service docker start

使用脚本安装
sudo yum update
Run the Docker installation script.
$ curl -fsSL https://get.docker.com/ | sh
This script adds the docker.repo repository and installs Docker.
Start the Docker daemon.
$ sudo service docker start

配置文件修改/etc/systemd/system/docker.service.d/docker.conf：
ExecStart=/usr/bin/docker daemon -H fd:// -D -s overlay --insecure-registry docker.16qian.cn -H 10.10.16.194:2375 -H unix:///var/run/docker.sock

卸载
yum list installed | grep docker
yum list installed | grep docker
docker-engine.x86_64 1.7.1-1.el7 @/docker-engine-1.7.1-1.el7.x86_64.rpm
Remove the package.
$ sudo yum -y remove docker-engine.x86_64
This command does not remove images, containers, volumes, or user-created configuration files on your host.
To delete all images, containers, and volumes, run the following command:
$ rm -rf /var/lib/docker
Locate and delete any user-created configuration files.