CentOS6.8安装docker教程

1. 在VMware新安装CentOS6.8系统
   CentOS6.8可在阿里镜像库下载： https://mirrors.aliyun.com/centos-vault/6.8/isos/x86_64/
2. 在新安装系统配置yum源
   2.1 进入目录 /etc/yum.repos.d
   2.2 对原配置备份
   mv *.repo ./bak
   2.3 下载新yum配置
   wget http://mirrors.aliyun.com/repo/Centos-6.repo
   2.4 重命名下载的配置为 CentOS-Base.repo
   2.5 yum clean all && yum makecache
   配置可参考：

# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client.  You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the 
# remarked out baseurl= line instead.
#
#[base]
name=CentOS-vault-6.8 - Base - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos-vault/6.8/os/$basearch/http://mirrors.aliyuncs.com/centos-vault/6.8/os/$basearch/http://mirrors.cloud.aliyuncs.com/centos-vault/6.8/os/$basearch/https://vault.centos.org/6.8/os/x86_64/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos-vault/RPM-GPG-KEY-CentOS-6#released updates 
[updates]
name=CentOS-vault-6.8 - Updates - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos-vault/6.8/updates/$basearch/http://mirrors.aliyuncs.com/centos-vault/6.8/updates/$basearch/http://mirrors.cloud.aliyuncs.com/centos-vault/6.8/updates/$basearch/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos-vault/RPM-GPG-KEY-CentOS-6#additional packages that may be useful
[extras]
name=CentOS-vault-6.8 - Extras - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos-vault/6.8/extras/$basearch/http://mirrors.aliyuncs.com/centos-vault/6.8/extras/$basearch/http://mirrors.cloud.aliyuncs.com/centos-vault/6.8/extras/$basearch/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos-vault/RPM-GPG-KEY-CentOS-6#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-vault-6.10 - Plus - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos-vault/6.10/centosplus/$basearch/http://mirrors.aliyuncs.com/centos-vault/6.10/centosplus/$basearch/http://mirrors.cloud.aliyuncs.com/centos-vault/6.10/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirrors.aliyun.com/centos-vault/RPM-GPG-KEY-CentOS-6#contrib - packages by Centos Users
[contrib]
name=CentOS-vault-6.10 - Contrib - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos-vault/6.10/contrib/$basearch/http://mirrors.aliyuncs.com/centos-vault/6.10/contrib/$basearch/http://mirrors.cloud.aliyuncs.com/centos-vault/6.10/contrib/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirrors.aliyun.com/centos-vault/RPM-GPG-KEY-CentOS-6

3. 安装docker
   3.1 yum install -y epel-release
   3.2 yum install -y docker-io
   使用yum install -y docker-io安装docker会失败，多次尝试均失败，故改为以下方式安装，并且可以成功安装
   yum install -y https://get.docker.com/rpm/1.7.1/centos-6/RPMS/x86_64/docker-engine-1.7.1-1.el6.x86_64.rpm
   3.3 修改安装后的配置文件/etc/sysconfig/docker
   other_args="--registry-mirror=https://xxxxxx.mirror.aliyuncs.com"
   3.4 启动docker
   service docker start

参考：
CentOS 6的yum源配置(最新地址） https://www.cnblogs.com/liucx/p/14745726.html
CentOS6.8配置阿里yum源 https://www.cnblogs.com/ddstudy/p/12547103.html
CentOS6.8上Docker的安装 https://www.cnblogs.com/wxwgk/p/13856308.html
解决报错 YumRepo Error: All mirror URLs are not using ftp, http[s] or file.
https://blog.csdn.net/justinzwd/article/details/113780067