docker安装

1.检查内核版本，返回的值大于3.10即可。 

$ uname -r 

2.确保yum是最新的 

$ yum update 

3.添加 yum 仓库

cat <<EOF > /etc/yum.repos.d/kubernetes.repo

[kubernetes]

name=Kubernetes

baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64

enabled=1

gpgcheck=1

repo_gpgcheck=1

gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg

    https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg

EOF

4.安装 Docker 

$ yum install -y docker-engine 

5.启动

docker $systemctl start docker.service 

6.查看 

docker --version 

7.设置开机启动 

$ sudo systemctl enable docker