Krdytkyu

Ubuntu 18.04

Kernel 4.15.0-39-generic x86_64 GNU/Linux

What i'm trying to archive, is to get docker to open a TCP socket on IP 192.168.2.11.

So i edit the docker configs:

systemctl edit docker

This is how my /etc/systemd/system/docker.service.d/.#override.conf looks like.

[Service]

ExecStart=

ExecStart=/usr/bin/dockerd -H unix:///var/run/docker.sock -H tcp://192.168.2.11:2375

Then I run:

systemctl restart docker

I get the following error:

-- Unit docker.service has finished shutting down.

Nov 15 09:45:35 docker systemd[1]: Starting Docker Application Container Engine...

-- Subject: Unit docker.service has begun start-up

-- Defined-By: systemd

-- Support: http://www.ubuntu.com/support

--

-- Unit docker.service has begun starting up.

Nov 15 09:45:35 docker dockerd[27753]: Failed to load listeners: can't create unix socket /var/run/docker.sock: is a directory

Nov 15 09:45:35 docker systemd[1]: docker.service: Main process exited, code=exited, status=1/FAILURE

Nov 15 09:45:35 docker systemd[1]: docker.service: Failed with result 'exit-code'.

Nov 15 09:45:35 docker systemd[1]: Failed to start Docker Application Container Engine.

-- Subject: Unit docker.service has failed

-- Defined-By: systemd

-- Support: http://www.ubuntu.com/support

--

-- Unit docker.service has failed.

--

-- The result is RESULT.

I spend about one hour trying to figure out why, and this is totally my own mistake for not reading the error message. the error message clearly states

can't create unix socket /var/run/docker.sock: is a directory

the first thing i do, is to enter root. (this is how i prefer to not do this, if you dont like to work this way. just add sudo infront of all the commmands )

sudo su

I check the path, using the following command.

ls -la /var/run/docker.sock

It shows that, the path is in fact a directory. So i delete the directory

rm -fr /var/run/docker.sock

then i restart the docker.service

systemctl edit docker

Docker starts, and the output of systemctl status docker is all good.

Conclution: if you get this error message, and run ls on docker.sock and it does not look like this. then remove the directory and restart docker.

ls -la /var/run/docker.sock

srw-rw---- 1 root docker 0 Nov 15 09:47 /var/run/docker.sock