超！超！超简单，Linux安装Docker

1、安装依赖
yum-util 提供yum-config-manager功能，另外两个是devicemapper驱动依赖的

sudo yum install -y yum-utils device-mapper-persistent-data lvm2

2、设置yum源

#中央仓库
sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
#阿里仓库
sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

3、查看仓库中所有Docker版本

sudo yum list docker-ce --showduplicates | sort -r

4、安装Docker

# 默认安装
sudo yum -y install docker-ce

5、启动, 加入开机启动

#启动
sudo systemctl start docker
#加入开机启动
sudo systemctl enable docker
#重启
sudo systemctl restart  docker
#关闭
sudo systemctl stop docker

6、验证是否安装成功

sudo docker version

7、添加GitLab Runner官方仓库

curl -L https://packages.gitlab.com/install/repositories/runner/gitlab-runner/script.rpm.sh | sudo bash

8、安装最新版本GitLab Runner

sudo yum install gitlab-runner

9、给 gitlab-runner 执行sudo权限

## Allow root to run any commands anywhere
root    ALL=(ALL)       ALL
gitlab-runner ALL=(ALL)       NOPASSWD:ALL

10、注册Runner、部署Java项目看这里：https://www.cnblogs.com/linnuo/p/14981547.html

Over~ Over~