泊坞窗：无法连接到码头工人守护

Question

我运行Ubuntu安装以下软件泊坞窗：

$ docker version 
Client: 
Version:  1.9.1 
API version: 1.21 
Go version: go1.4.3 
Git commit: a34a1d5 
Built:  Fri Nov 20 17:56:04 UTC 2015 
OS/Arch:  linux/amd64 
Cannot connect to the Docker daemon. Is the docker daemon running on this host? 

$ docker-compose -v 
docker-compose version 1.7.0, build 0d7bf73 

当试图运行搬运工，撰写我收到以下错误：

$ sudo docker-compose up 
ERROR: Couldn't connect to Docker daemon at http+docker://localunixsocket - is it running? 

If it's at a non-standard location, specify the URL with the DOCKER_HOST environment variable. 

我试过以下内容：

systemctl unmask docker.service 
systemctl unmask docker.socket 
systemctl start docker.service 

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 Fri 2016-04-29 13:36:57 CEST; 4min 3s ago 
    Docs: https://docs.docker.com 
Main PID: 6394 (docker) 
    Memory: 13.3M 
     CPU: 119ms 
    CGroup: /system.slice/docker.service 
      └─6394 /usr/bin/docker daemon -H fd:// 

Apr 29 13:36:57 Charles docker[6394]: time="2016-04-29T13:36:57.722083467+02:00" level=info msg="Default bridge (docker0) is assigned with an IP address 172.17.0.0/16. Daemon opt...d IP address" 
Apr 29 13:36:57 Charles docker[6394]: time="2016-04-29T13:36:57.805189862+02:00" level=warning msg="Your kernel does not support swap memory limit." 
Apr 29 13:36:57 Charles docker[6394]: time="2016-04-29T13:36:57.827955299+02:00" level=info msg="Loading containers: start." 
Apr 29 13:36:57 Charles docker[6394]: time="2016-04-29T13:36:57.828083895+02:00" level=info msg="Loading containers: done." 
Apr 29 13:36:57 Charles docker[6394]: time="2016-04-29T13:36:57.828095512+02:00" level=info msg="Daemon has completed initialization" 
Apr 29 13:36:57 Charles docker[6394]: time="2016-04-29T13:36:57.828125198+02:00" level=info msg="Docker daemon" commit=a34a1d5 execdriver=native-0.2 graphdriver=aufs version=1.9.1 
Apr 29 13:36:57 Charles systemd[1]: Started Docker Application Container Engine. 
Apr 29 13:37:10 Charles systemd[1]: Started Docker Application Container Engine. 
Apr 29 13:37:34 Charles systemd[1]: Started Docker Application Container Engine. 
Apr 29 13:38:01 Charles systemd[1]: Started Docker Application Container Engine. 
Hint: Some lines were ellipsized, use -l to show in full. 
anton@Charles:~/Documents/software/deliverable$ docker ps 
Cannot connect to the Docker daemon. Is the docker daemon running on this host? 

Sudo？

当我运行使用sudo泊坞窗似乎运行：

$ sudo docker ps 
CONTAINER ID  IMAGE    COMMAND    CREATED    STATUS    PORTS    NAMES 
$ docker ps 
Cannot connect to the Docker daemon. Is the docker daemon running on this host? 

我该如何解决这个问题？

Answer 1

看一看这个thread。它似乎处理同样的问题。

答：

The Docker machine is running. But you need to export some environment to connect to the Docker machine. By default, the docker CLI client is trying to communicate to the daemon using http+unix://var/run/docker.sock (as shown in the error message).

Export the correct environment variables using eval $(docker-machine env dev) and then try again. You can also just run docker-machine env dev to see the environment variables it will export. Notice that one of them is DOCKER_HOST, just as the error message suggests you may need to set.

Answer 2

添加sudo

这个答案来自Docker-Compose can't connect to Docker Daemon