安装docker-ce

$ sudo yum remove docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-selinux \
                  docker-engine-selinux \
                  docker-engine

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

$ sudo yum-config-manager \
    --add-repo \
    http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
# https://download.docker.com/linux/centos/docker-ce.repo

$ sudo yum install docker-ce

异常

解决依赖关系完成

软件包：docker-ce-18.03.1.ce-1.el7.centos.x86_64 (docker-ce-stable)

需要：container-selinux >= 2.9
解决: rpm -ivh http://7xslql.com1.z0.glb.clouddn.com/container-selinux-2.21-1.el7.noarch.rpm
这个包是我从https://rpmfind.net/linux/centos/7.4.1708/extras/x86_64/Packages/container-selinux-2.21-1.el7.noarch.rpm下载后再传到我的七牛云cdn上的.

缺少pigz包：

下载包 http://mirror.centos.org/centos/7/extras/x86_64/Packages/pigz-2.3.3-1.el7.centos.x86_64.rpm
下载后：
执行 rpm -ivh pigz-2.3.3-1.el7.centos.x86_64.rpm

---

安装docker-compose

https://github.com/docker/compose/releases

$ curl -L http://7xslql.com1.z0.glb.clouddn.com/docker-compose-Linux-x86_64 -o /usr/local/bin/docker-compose
$ chmod +x /usr/local/bin/docker-compose
$ docker-compose --version
docker-compose version 1.21.2, build a133471

安装加速器

参考阿里云教程

从一台节点拷贝/复制镜像到另外一个节点(节点A到节点B)

1. 节点A: sudo docker save -o <path for generated tar file> <image name>
2. 节点B: sudo docker load -i <path to image tar file>