如果你使用gitlab-ci / gitlab-runners，如果你没有访问/var/run/docker.sock的权限，你就会得到这个错误。

Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock

解决问题:

sudo usermod -aG docker gitlab-runner

验证:

sudo -u gitlab-runner -H docker info

希望这能有所帮助。

我在安装后重新启动Docker:

$ sudo service docker stop
$ sudo service docker start

这很有效。

I also had the same issue. The problem was in sockets allocated to docker-daemon and docker-client. First, permission was not set for the docker-client on docker.sock You can set it using "sudo usermod -aG docker $USER" Then check your bash file where the docker-client is running, For me it was on 0.0.0.0:2375, while docker-daemon was running on unix socket.(It was set in the configuration file of dockerd). Just comment the bash-line and it'll work fine. But if you want to make it work on TCP port instead of unix socket, change the configuration file of dockerd and set it on 0.0.0.0.2375 and keep the line in bash as it is if present or set it to 0.0.0.0:2375.

我在亚马逊AWS上运行时也遇到了同样的问题。

以下是我的尝试:

使用已经存在的AWS实例在本地设置docker-machine 使用的通用设置 它算是连接上了，但因为远程端口关闭了，所以失败了 在那之后，Docker守护进程拒绝启动，但是运行dockerd可以工作…

在远程机器上进行了如下测试:

service docker start # Also restart, no success
systemctl start docker # Also restart, no success
dockerd # Success

我删除了/var/lib/docker并卸载了所有内容，但重新安装后没有成功。不幸的是，我没有日志存储从失败，但docker。服务拒绝启动。

然而，最终解决我问题的基本上是:

sudo usermod -aG docker $(whoami)

尝试将当前用户添加到docker组:

sudo usermod -aG docker $USER

然后注销并重新登录。

您可以使用该命令

sudo service docker stop && sudo service docker start

OR

sudo service docker restart

简单地重新启动它。