可能会有特权问题，等命令解决了再说吧。

sudo chown $USER /var/run/docker.sock

感谢Max的解决方案:https://stackoverflow.com/posts/60282354/revisions

有人查过日志吗?

在我的例子中，/var/log/upstart/docker.log中的错误信息是:

Listening for HTTP on unix (/var/run/docker.sock) 
[graphdriver] using prior storage driver "aufs" 
Running modprobe bridge nf_nat failed with message: , error: exit status 1 
Error starting daemon: Error initializing network controller: Error creating default "bridge" network: can't find an address range for interface "docker0" 

值得一提的是，我打开了vpn，所以: $ sudo service openvpn stop $ sudo service docker restart $ docker-compose |start $ sudo service openvpn start 这就是解决办法。

我已经通过以下步骤解决了这个问题

$ sudo service docker status
$ sudo service docker start
$ sudo docker-compose up

现在docker-compose up正在工作

作为根用户运行。Sudo docker-compose up -build

以下是对我有用的，我不确定是哪一部分起作用了:

julian:project$ sudo service docker status
julian:varys$ sudo service docker status                                                                                                                                                                                
● docker.service - Docker Application Container Engine
   Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
   Active: active (running) since Wed 2020-07-15 01:21:16 UTC; 24min ago
     Docs: https://docs.docker.com
 Main PID: 6762 (dockerd)
    Tasks: 25
   CGroup: /system.slice/docker.service
           └─6762 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock

julian:project$ export DOCKER_HOST=unix:///run/containerd/containerd.sock

julian:project$ sudo groupadd docker
groupadd: group 'docker' already exists
julian:project$ sudo gpasswd -a $USER docker
Adding user ubuntu to group docker
julian:project$ newgrp docker

julian:project$ ls -ln /var/run/ | grep docker
drwx------  5   0   0  120 Jul 15 01:10 docker
-rw-r--r--  1   0   0    4 Jul 15 01:10 docker.pid
srw-rw----  1   0 999    0 Jul 15 01:10 docker.sock

julian:project$ sudo rm /var/run/docker.sock                                                                                                                                                                                            
julian:project$ sudo rm /var/run/docker.pid

julian:project$ sudo service docker restart  

1 . sudo service docker stop 
2 . sudo service docker status
3 . sudo service docker start
4 . docker-compose build <app_name\service_name>