Docker unix socket permission issue on ubuntu-core update

[Christopher De Vries]

I have been running the docker framework (2015-06-15 1.6.1.002) on a Snappy Ubuntu Core (ubuntu-core/15.04/stable) instance on aws EC2. On June 11th the instance automatically upgraded from ubuntu-core version 2 to ubuntu-core version 3 and rebooted. The running Docker containers restarted without any issues, however when I next logged in to run a docker command I got the following error:

FATA[0000] Get http:///var/run/docker.sock/v1.18/containers/json: dial unix /var/run/docker.sock: permission denied. Are you trying to connect to a TLS-enabled daemon without TLS?

I rebooted to see if it would help, but the error was still there. I checked the dmesg log and found the following entry was added when I tried to run a docker command:

[ 72.230872] audit: type=1400 audit(1434397079.776:12): apparmor="DENIED" operation="connect" info="Failed name lookup - disconnected path" error=-13 profile="docker_docker_1.6.1.002" name="run/docker.sock" pid=1025 comm="docker.x86_64" requested_mask="wr" denied_mask="wr" fsuid=1000 ouid=0

I tried using the docker command both as a nonprivileged user and using "sudo". In both cases I was unable to run the docker command.

I was able to resolve the issue by uninstalling and reinstalling the docker framework using the commands:

sudo snappy remove docker
sudo snappy install docker

[Christopher De Vries (chris-h-devries)]

I tried running the command:

sudo aa-clickhook -f

and that also resolved the issue without having to reinstall the docker framework.

[Christopher De Vries (chris-h-devries)]

Any updates?

[Michael Vogt (mvo)]

Adding Kick-In to get a docker experts opinion.

[Michael Vogt (mvo)]

Docker works on ubuntu core 16 now.