docker容器内执行docker命令提示Got permission denied while trying to connect to the Docker

docker容器内执行docker命令报以下错误

docker: command not found
这是没有docker命令

需要挂载
 privileged: true
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - /bin/docker:/bin/docker

这是没有权限执行

Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get http://%2Fvar%2Frun%2Fdocker.sock/v1.39/containers/json: dial unix /var/run/docker.sock: connect: permission denied

#则需要把将当前用户加入docker组
sudo gpasswd -a ${USER} docker

#或者将当前用户直接加到文件中
sudo echo "docker:x:994:${USER}" >> /etc/group

#查看docker用户组成员
cat /etc/group |grep docker

#重新启动docker服务
sudo systemctl restart docker
# 赋予权限
sudo chmod a+rw /var/run/docker.sock