centos7中docker安装

1.关闭防火墙

systemctl status firewalld
systemctl stop firewalld 
systemctl disable firewalld

2.安装依赖环境

yum install -y yum-utils device-mapper-persistent-data lvm2

3.设置仓库

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

4.安装 Docker Engine

sudo yum install -y docker-ce docker-ce-cli containerd.io

6.开启Docker自动补全

yum install -y bash-completion

7.设置阿里云加速器

1.注册阿里云
2.找到容器镜像服务 —> 镜像工具 --> 镜像加速器

3.设置加速器

sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://xxxx.xxxx.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker

8.刷新文件

source /usr/share/bash-completion/completions/docker
source /usr/share/bash-completion/bash_completion

9.测试

1.运行一个 web 应用

docker pull training/webapp  
docker run -d -P training/webapp python app.py

2.查看 WEB 应用容器

docker ps

3.访问WEB容器

 curl http://127.0.0.1:32768/

看见Hello world就代表成功了