一、permission denied

• 当要执行docker images 报错：

   Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get "http://%2Fvar%2Frun%2Fdocker.sock/v1.24/containers/json?all=1": dial unix /var/run/docker.sock: connect: permission denied
  

  
• 解决方案：加上sudo sudo docker images

二、启动容器后又立即停止

• 原来的指令

docker run --name nginx -p 8080:80 -d -v /root/backend:/www/backend -v /data/nginx/conf.d/:/etc/nginx/conf.d --link myphp-fpm:php nginx:1.21.4

• 解决方案：

# 删除原来的
docker rm 容器ID

# 在运行的时候加上 -dit 和 /bin/bash
docker run --name nginx -p 8080:80 -dit -v /root/backend:/www/backend -v /data/nginx/conf.d/:/etc/nginx/conf.d --link myphp-fpm:php nginx:1.21.4 /bin/bash

三、Error: Failed to download metadata for repo ‘appstream’: Cannot prepare internal mirrorlist: No URLs in mirrorlist

新建一个centos容器，出现报错：Error: Failed to download metadata for repo ‘appstream’: Cannot prepare internal mirrorlist: No URLs in mirrorlist

• 解决方法

ping百度能ping通，不是网络问题。

执行以下指令，更改centos配置

cd /etc/yum.repos.d/
sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*
yum makecache
yum update -y