docker安装相关说明

安装

安装docker.

sudo yum install docker

开机自启

sudo systemctl enable docker

启动docker服务

sudo systemctl start docker

添加docker用户组

1. 创建 Docker 用户组
sudo groupadd docker
2.添加当前用户到 docker 组
sudo usermod -aG docker $USER

镜象加速

1. 编辑文件/etc/docker/daemon.json, 自己daemon.json文件已经有项目，就额外增长registry-mirrors项
sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
    "registry-mirrors": ["http://registry.cn-hangzhou.aliyuncs.com",
	"http://hub-mirror.c.163.com"]
}
EOF
2. 重启docker daemon
sudo systemctl daemon-reload
sudo systemctl restart docker

centos7 关闭防火墙

sudo systemctl stop firewalld 临时关闭
sudo systemctl disable firewalld ，而后reboot 永久关闭
sudo systemctl status  firewalld 查看防火墙状态。

centos7 关闭selinux

临时关闭命令：sudo setenforce 0
查看是否关闭成功：getenforce
编辑配置文件 /etc/selinux/config 。须要重启才能够生效
sudo sed -i '/^SELINUX=/s/enforcing/disabled/' /etc/selinux/config

配置代理

sudo mkdir -p /etc/systemd/system/docker.service.d

sudo tee /etc/systemd/system/docker.service.d/http-proxy.conf <<-'EOF'
[Service]
Environment="HTTP_PROXY=http://proxy-addr:proxy-port" "HTTPS_PROXY=http://proxy-addr:proxy-port" "NO_PROXY=localhost,127.0.0.1,docker-registry.somecorporation.com"
EOF

sudo systemctl daemon-reload
sudo systemctl restart docker

开放docker端口，对与centos7下的作法是

sudo nano /etc/sysconfig/docker
加上以下字段：
OPTIONS='--selinux-enabled -H unix://var/run/docker.sock -H tcp://0.0.0.0:2375'

//重启docker
sudo systemctl daemon-reload
sudo systemctl restart docker
netstat -nplt |grep 2375