centos8 Failed to get properties: Access denied

centos8 Failed to get properties: Access denied

Failed to start docker.service: Access denied

今天在centos8上安裝docker，參考以下網址

https://www.cnblogs.com/yufeng218/p/8370670.html

 

安裝完了運行docker info顯示錯誤

Server:
ERROR: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
errors pretty printing info

找了N多解決方案，什么daemon.json的、yum update的、systemctl start docker的都白搭，而且運行任何的systemctl命令都被拒絕，顯示Failed to start docker.service: Access denied

最后找到個解決方案 

https://superuser.com/questions/1125250/systemctl-access-denied-when-root/1130976

 

In my case, I had just upgraded systemd and any systemctl command was failing:

# systemctl daemon-reexec
Failed to reload daemon: Access denied
# systemctl status
Failed to read server status: Access denied

However according to the init manpage, you can do the same thing by sending SIGTERM to the daemon running as PID 1, which worked:

kill -TERM 1

This reloaded the daemon, after which all the systemctl commands started working again.