Had similar problem with Redhat
If you are working behind proxy, you must set the NO_PROXY=$NO_PROXY,/var/run/docker.sock
In my env I put it at /etc/sysconfig/docker file
After doing some research into solving this problem on my Linux
system I thought I would write this answer. Here is what I did to fix
the problem.
On Fedora 22
Installing Docker:
$> curl -fsSL https://get.docker.com/ | sh
After installing Docker:
A user needs to be added to the docker group.
$> sudo usermod -aG docker
The docker daemon needs to be started
$> sudo service docker start
You can set the daemon to start at boot
$> sudo chkconfig docker on
You can verify the docker service is running
$> service docker status
And one last final check
$> docker run hello-world