yum切换源&docker-ce安装

yum install -y xxxx 命令时会提示会出现网络错误，可通过切换yum的镜像源来解决

centOS7的镜像源文件的目录默认都在该路径下:

cd /etc/yum.repos.d/

首先先备份以免出现错误:

cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak

镜像源:

#阿里云
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
#网易
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.163.com/.help/CentOS7-Base-163.repo

清缓存&重新生成缓存

yum clean all
yum makecache　

docker-ce安装

卸载旧版本

sudo yum remove docker docker-common docker-selinux docker-engine

安装依赖

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

下载官方的repo

wget -O /etc/yum.repos.d/docker-ce.repo https://download.docker.com/linux/centos/docker-ce.repo

清理缓存安装docker

sudo yum makecache fast
sudo yum install docker-ce -y

启动docker

sudo systemctl start docker
#开机启动
sudo systemctl enable docker

配置Docker的镜像加速器

sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["你的加速地址"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker