1. 安装需求
- 内核版本3.10以上
- Centos 7以上
- 64位版本
2. 使用root登录或者具有sudo权限
3. 确保系统是最新的
yum update
4. 添加yum源
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
5. 安装docker包
yum install docker-engine
6. 开启docker服务
service docker start
7. 验证安装
docker run hello-world
输出如下
Unable to find image 'hello-world:latest' locally latest: Pulling from library/hello-world c04b14da8d14: Pull complete Digest: sha256:0256e8a36e2070f7bf2d0b0763dbabdd67798512411de4cdcf9431a1feb60fd9 Status: Downloaded newer image for hello-world:latest Hello from Docker! This message shows that your installation appears to be working correctly. To generate this message, Docker took the following steps: 1. The Docker client contacted the Docker daemon. 2. The Docker daemon pulled the "hello-world" image from the Docker Hub. 3. The Docker daemon created a new container from that image which runs the executable that produces the output you are currently reading. 4. The Docker daemon streamed that output to the Docker client, which sent it to your terminal. To try something more ambitious, you can run an Ubuntu container with: $ docker run -it ubuntu bash Share images, automate workflows, and more with a free Docker Hub account: https://hub.docker.com For more examples and ideas, visit: https://docs.docker.com/engine/userguide/
8. 创建docker组（可选）
docker命令必须root权限执行，但docker用户组默认拥有这个权限
groupadd docker
usermod -aG docker your_username
docker组的用户默认可执行docker命令，无需root权限
9. 启动时运行docker服务（可选）
chkconfig docker on
10. 卸载docker
查看安装docker包
$ yum list installed | grep docker docker-engine.x86_64 1.11.2-1.el7.centos @dockerrepo docker-engine-selinux.noarch 1.11.2-1.el7.centos @dockerrepo
删除安装的包
yum -y remove docker-engine.x86_64
这一步并未删除数据，要想删除镜像、容器和磁盘卷，执行如下命令
rm -rf /var/lib/docker