curl -fsSL get.docker.com -o get-docker.sh
sudo sh get-docker.sh
useradd docker
adduser docker
adduser -g docker
adduser -g docker  docker
passwd docker
sudo usermod -aG docker docker
sudo systemctl enable docker

Docker开启远程访问

Linux centos 版本3.10.0-514.el7.x86_64(uname-r)
关闭防火墙:

systemctl stop firewalld.service

查看防火墙的状态

service firewalld status; #查看防火墙状态

修改以ExecStart开头的行：(因为我的系统是centos 7的，所以修改为下面得)
首先编辑docker的宿主机文件

vim/lib/systemd/system/docker.service
ExecStart=/usr/bin/dockerd-Hfd:// -H tcp://0.0.0.0:2375

修改后保存文件，然后通知docker服务做出的修改

systemctl daemon-reload

重启docker服务

service docker restart

接下来测试一下看是否能连接到docker api。上面的2375就是对应端口

curlhttp://localhost:2375/verion

Docker容器连接外部网络
默认通过桥接方式

[https://docs.docker.com/network/bridge/](https://docs.docker.com/network/bridge/)
vim /etc/sysctl.conf
# sysctl settings are defined through files in
# /usr/lib/sysctl.d/, /run/sysctl.d/, and /etc/sysctl.d/.
# Vendors settings live in /usr/lib/sysctl.d/.
# To override a whole file, create a new file with the same in
# /etc/sysctl.d/ and put new settings there. To override
# only specific settings, add a file with a lexically later
# name in /etc/sysctl.d/ and put new settings there.
#
# For more information, see sysctl.conf(5) and sysctl.d(5).
net.ipv4.ip_forward = 1

​重启宿主机:

service docker restart

Registry 仓库安装

vim /etc/default/docker
DOCKER_OPTS="--insecure-registry 172.23.23.87:5000"

二、使用rpm包安装

如果你不能使用docker的镜像仓库，你可以下载.rpm文件，然后手动安装。

1、进入 https://download.docker.com/linux/centos/7/x86_64/stable/Packages/ 页面，下载要安装Docker版本的.rpm文件
2、安装Docker

$ sudo yum install docker.rpm

3、启动doker

$ sudo systemctl start docker

4、通过运行hello-world镜像验证安装是否成功

$ sudo docker run hello-world

卸载Docker

1、卸载Docker安装包

$ sudo yum remove docker-ce

image.gif

2、此操作不会删除你电脑上的镜像，容器，卷和自定义配置文件，如果想删除可以用以下命令

sudo rm -rf /var/lib/docker

原文链接：https://blog.csdn.net/u011936655/article/details/81062343</pre>