虚拟机 CentOS7上安装docker

1.安装必须的依赖：sudo yum install -y yum-utils device-mapper-persistent-data lvm2

2.设置yum源：sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

或阿里源：sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

3.安装docker-ce：sudo yum install docker-ce docker-ce-cli containerd.io

4.安装docker-compose：sudo curl -L "https://github.com/docker/compose/releases/download/1.24.1/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

5.设置权限：chmod +x /usr/local/bin/docker-compose

配置加速源：1. vi /etc/docker/daemon.json

2.按i

3.输入（阿里云）：{ "registry-mirrors": ["https://dist7hw1.mirror.aliyuncs.com"] }

4.esc ——> :wq

5.systemctl daemon-reload

6.systemctl restart docker

记录几个命令：

启动docker：systemctl start docker

防火墙放行10050端口： firewall-cmd --zone=public --add-port=10050/tcp --permanent