Problem with Docker

Bug
1

Hello All,

I’ve updated my nethserver to the latest version (7.9) and it’s working great.
But I also had/have Docker installed and herein lies the problem.

When I look in Cockpit/services, the docker service is not running. Even when I try to start it, it gives me an error message (cannot start.)

When I followup this error message, it gives me the following info:
{
“id”: “1607790627”,
“type”: “EventFailed”,
“message”: “Action failed”
}

I’ve already reinstalled all the files, like docker-ce, nethserver-docker and all related.

Bu the strange thing is, when I start the docker daemon manually in a terminal with the command ‘dockerd’ it runs perfectly.

And it worked perfectly in version 7.8

I hope somebody can give me a clue or hint, where to look for the problem.

Greetings,
Henk

2

what is the output in the terminal ?

systemctl status docker

systemctl restart docker

docker ps

everything wrong or good are logged to /var/log/docker/docker.log

3

Hello Stephane,

Here is the requested info:

[root@pink ~]# systemctl restart docker
Job for docker.service failed because the control process exited with error code. See “systemctl status docker.service” and “journalctl -xe” for details.
[root@pink ~]# systemctl status docker
● docker.service - Docker Application Container Engine
Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)
Drop-In: /etc/systemd/system/docker.service.d
└─nethserver.conf
Active: activating (auto-restart) (Result: exit-code) since Sun 2020-12-13 07:39:20 CET; 129ms ago
Docs: https://docs.docker.com
Process: 42516 ExecStart=/usr/bin/dockerd --config-file=/etc/docker/docker.conf (code=exited, status=1/FAILURE)
Main PID: 42516 (code=exited, status=1/FAILURE)

Dec 13 07:39:20 pink.elzing.eu systemd[1]: docker.service: main process exited, code=exited, status=1/FAILURE
Dec 13 07:39:20 pink.elzing.eu systemd[1]: Failed to start Docker Application Container Engine.
Dec 13 07:39:20 pink.elzing.eu systemd[1]: Unit docker.service entered failed state.
Dec 13 07:39:20 pink.elzing.eu systemd[1]: docker.service failed.
[root@pink ~]# docker ps
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

And this is the last part of the docker.log:

Dec 13 07:39:19 pink dockerd: time=“2020-12-13T07:39:19.893435692+01:00” level=info msg=“Starting up”
Dec 13 07:39:19 pink dockerd: time=“2020-12-13T07:39:19.894909326+01:00” level=info msg=“parsed scheme: “unix”” module=grpc
Dec 13 07:39:19 pink dockerd: time=“2020-12-13T07:39:19.895339090+01:00” level=info msg=“scheme “unix” not registered, fallback to default scheme” module=grpc
Dec 13 07:39:19 pink dockerd: time=“2020-12-13T07:39:19.895714826+01:00” level=info msg=“ccResolverWrapper: sending update to cc: {[{unix:///run/containerd/containerd.sock 0 }] }” module=grpc
Dec 13 07:39:19 pink dockerd: time=“2020-12-13T07:39:19.896068181+01:00” level=info msg=“ClientConn switching balancer to “pick_fir
st”” module=grpc
Dec 13 07:39:19 pink dockerd: time=“2020-12-13T07:39:19.900194390+01:00” level=info msg=“parsed scheme: “unix”” module=grpc
Dec 13 07:39:19 pink dockerd: time=“2020-12-13T07:39:19.900233049+01:00” level=info msg=“scheme “unix” not registered, fallback to
default scheme” module=grpc
Dec 13 07:39:19 pink dockerd: time=“2020-12-13T07:39:19.900274749+01:00” level=info msg=“ccResolverWrapper: sending update to cc: {[
{unix:///run/containerd/containerd.sock 0 }] }” module=grpc
Dec 13 07:39:19 pink dockerd: time=“2020-12-13T07:39:19.900293053+01:00” level=info msg=“ClientConn switching balancer to “pick_fir
st”” module=grpc
Dec 13 07:39:20 pink dockerd: time=“2020-12-13T07:39:20.002893960+01:00” level=info msg="[graphdriver] using prior storage driver: o
verlay2"
Dec 13 07:39:20 pink dockerd: time=“2020-12-13T07:39:20.041900630+01:00” level=info msg=“Loading containers: start.”
Dec 13 07:39:20 pink dockerd: time=“2020-12-13T07:39:20.334885974+01:00” level=info msg=“Default bridge (docker0) is assigned with a
n IP address 172.17.0.0/16. Daemon option --bip can be used to set a preferred IP address”
Dec 13 07:39:20 pink dockerd: time=“2020-12-13T07:39:20.335857376+01:00” level=info msg=“stopping event stream following graceful sh
utdown” error="" module=libcontainerd namespace=moby
Dec 13 07:39:20 pink dockerd: time=“2020-12-13T07:39:20.336168787+01:00” level=info msg=“stopping event stream following graceful sh
utdown” error=“context canceled” module=libcontainerd namespace=plugins.moby
Dec 13 07:39:20 pink dockerd: failed to start daemon: Error initializing network controller: Error creating default “bridge” network
: Pool overlaps with other one on this address space

Thanks for looking into this.

Greetings,
Henk

4

You cannot create docker0 because it probably still exists a docker0 gost

Reading this

Either remove the network folder content or asign another network to docker0