Cannot connect to the Docker daemon after clean in

Question

I tried to install docker on my ubuntu 14.04. After Installation I had some issues you can read them here: docker installation issue file not found after installation

Installation is done now but when I run docker ps -a I got this error:

Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

I thought okay no problem I start it. So I ran /etc/init.d/docker start

Nothing changed. What is the issue in this case?

Thanks in advance

UPDATE

Docker lock sais

time="2019-01-15T16:04:48.442161704Z" level=error msg="'overlay' not found as a supported filesystem on this host. Please ensure kernel is new enough and has overlay support loaded." storage-driver=overlay2
time="2019-01-15T16:04:48.443237115Z" level=error msg="AUFS was not found in /proc/filesystems" storage-driver=aufs
time="2019-01-15T16:04:48.444209277Z" level=error msg="'overlay' not found as a supported filesystem on this host. Please ensure kernel is new enough and has overlay support loaded." storage-driver=overlay
time="2019-01-15T16:04:48.448467742Z" level=info msg="Graph migration to content-addressability took 0.00 seconds"
time="2019-01-15T16:04:48.451222266Z" level=warning msg="Your kernel does not support oom control"
time="2019-01-15T16:04:48.451238804Z" level=warning msg="Your kernel does not support memory swappiness"
time="2019-01-15T16:04:48.451249423Z" level=warning msg="Your kernel does not support kernel memory limit"
time="2019-01-15T16:04:48.451255189Z" level=warning msg="Unable to find cpu cgroup in mounts"
time="2019-01-15T16:04:48.451287772Z" level=warning msg="Unable to find cpuset cgroup in mounts"
time="2019-01-15T16:04:48.451337670Z" level=warning msg="mountpoint for pids not found"
Error starting daemon: Devices cgroup isn't mounted

Answer 1

3.13 is a quite old kernel. Install latest stable stock kernel (kernel from 3.19 has support for overlay FS). The main blocker is cgroup issue. Cgroups must be available.

Other useful tips: error starting docker daemon on ubuntu 14.04 (Devices cgroup isn't mounted)

Answer 2

I think your docker user is not sudoer; 1. Create the docker group.

sudo groupadd docker

2. Add your user to the docker group.

sudo usermod -aG docker $USER

3. Log out and log back in so that your group membership is re-evaluated. 4. Verify that you can run docker commands without sudo

docker run hello-world

Source