安装docker

#1.查看CentOS版本
cat /etc/redhat-release
#2.查询内核版本，docker要求CentOS 系统的内核版本高于 3.10
uname -r

centos_v.jpg

#3.设置阿里云源
wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
#4.安装docker
yum install docker -y
#5.启动并加入开机启动
systemctl start docker
systemctl enable docker
#6查看docker版本
docker version
# 错误：Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
# 镜像加速 
vi /etc/docker/daemon.json
{"registry-mirrors":["https://reg-mirror.qiniu.com/"]}
# 加载文件，重启docker
systemctl daemon-reload
systemctl restart docker.service

docker_v.jpg

下载自己需要的镜像：

docker pull java:8
docker pull redis:latest
docker pull rabbitmq:3-management