Docker installation problems

[Gary L. Roach]

Operating System: Debian GNU/Linux 10
KDE Plasma Version: 5.14.5
Qt Version: 5.11.3
KDE Frameworks Version: 5.54.0
Kernel Version: 4.19.0-17-amd64
OS Type: 64-bit
Processors: 4 × AMD FX(tm)-4350 Quad-Core Processor
Memory: 15.6 GiB of RAM

Hi All,

I'm still having installation problems with Docker. I followed the
Digital Ocean instructions for Debian 10 to the letter. Everything went
fine until I tried to run the test case. I got the following:

> root@debian:/home/gary# docker run hello-world
> docker: Cannot connect to the Docker daemon at
> unix:///var/run/docker.sock. Is the docker daemon running?.
> See 'docker run --help'.
> root@debian:/var/lib/docker# systemctl status docker
> ● docker.service - Docker Application Container Engine
>    Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor
> preset: enabled)
>    Active: failed (Result: exit-code) since Mon 2021-07-05 12:43:13
> PDT; 2 days ago
>      Docs: https://docs.docker.com
>  Main PID: 1026 (code=exited, status=1/FAILURE)
>
> Jul 05 12:43:13 debian systemd[1]: docker.service: Service
> RestartSec=2s expired, scheduling restart.
> Jul 05 12:43:13 debian systemd[1]: docker.service: Scheduled restart
> job, restart counter is at 3.
> Jul 05 12:43:13 debian systemd[1]: Stopped Docker Application
> Container Engine.
> Jul 05 12:43:13 debian systemd[1]: docker.service: Start request
> repeated too quickly.
> Jul 05 12:43:13 debian systemd[1]: docker.service: Failed with result
> 'exit-code'.
> Jul 05 12:43:13 debian systemd[1]: Failed to start Docker Application
> Container Engine.

I suspect that something might be wrong with the /etc/apt/daemon.json
file but am not sure what.

> root@debian:/etc/docker# less daemon.json
{
>   "debug": true,
>   "tls": true,
>   "tlscert": "/var/docker/server.pem",
>   "tlskey": "/var/docker/serverkey.pem",
>   "hosts": ["tcp://192.168.254.12:2376"]
> }
My installation doesn't seem to be very stable. I'm using the free
community edition if that helps. Any help will be sincerely appreciated.

Gary R.

[IL Ka]

I suspect that something might be wrong with the /etc/apt/daemon.json
file but am not sure what.

try 

# dockerd

https://docs.docker.com/config/daemon/#start-the-daemon-manually

Do you see any errors?

 

[Gary L. Roach]

Running dockerd produced the following:

root@debian:/etc/docker# dockerd
INFO[2021-07-08T09:44:02.344680610-07:00] Starting up                                  
failed to create API server: Could not load X509 key pair (cert: "/var/docker/server.pem", key: "/var/docker/serverkey.pem"): open /var/docker/server.pem: no such file or directory

On my system the /var/docker directory doesn't exist. Further, server.pem doesn't exist anywhere on my system. Now what?

Gary R.

[john doe]

Looks like you need to generate that file (1).


1)
https://stackoverflow.com/questions/57830003/var-docker-server-pem-no-such-file-or-directory

--
John Doe

[Alex Mestiashvili]

From my little experience, the default docker-ce installation comes
without daemon.json file. Try to remove it and see if docker comes up.

It also doesn't look like Debian related issue tbh, since it is a third
party package.

Alex

[IL Ka]

failed to create API server: Could not load X509 key pair (cert: "/var/docker/server.pem", key: "/var/docker/serverkey.pem"): open /var/docker/server.pem: no such file or directory

On my system the /var/docker directory doesn't exist. Further, server.pem doesn't exist anywhere on my system. Now what?

But in your ``daemon.json`` you explicitly asked for TLS and even provided a path to these files.

(to enable TLS one needs a certificate (with public key) and private key for it)

Let's see if docker works without this file.

# mv /etc/docker/daemon.json /etc/docker/daemon.json.back

# dockerd

if it works, start it with ``systemd`` and see if it works

[Gary L. Roach]

I reinstalled using the docker.com instructions and it works. I also
installed Portainer. It also works. I appreciate all of the help. Now
all I have to do is learn to use it.

Thanks again.

Gary R