安装Base源

curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

安装epel源

yum install epel-release -y

查看epel源下docker相关的包

yum list docker --show-duplicates

安装docker-ce

yum install -y yum-utils
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum install -y docker-ce

配置daemon.json

vim /etc/docker/daemon.json
{
  "graph": "/data/docker",
  "storage-driver": "overlay2",
  "insecure-registries": ["registry.access.redhat.com", "quay.io"],
  "registry-mirrors": ["https://b7a2cowo.mirror.aliyuncs.com"],
  "exec-opts": ["native.cgroupdriver=systemd"],
  "live-restore": true,
  "bip": "172.7.5.1/24"
}

设置开机启动

systemctl enable docker
systemctl start docker

第一个docker程序

docker run hello-world
# 重要信息
To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    (amd64)
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

镜像的结构

${registry_name}/${repository_name}/${image_name}:${tag_name}
例如:
docker.io/library/alpine:3.10.1

docker镜像仓库

docker镜像仓库()
docker login docker.io
登录信息的存放地址：cat /root/.docker/config.json