Cannot connect to the Docker daemon

Traefik Traefik v2
1

Hi.
I'm struggling to get traefik running properly.
It cannot connect to the docker daemon, and gives me these errors:

level=error msg="Failed to retrieve information of the docker client and server host: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?" providerName=docker
level=error msg="Provider connection error Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?, retrying in 10.921124173s" providerName=docker

I run the docker container as non-root, with a username dockeruser.
I have run the commands:

sudo groupadd docker
sudo usermod -aG docker $USER

And everything seems to run fine otherwise. I have other containers up and running

In the traefik docker compose file I have set this:

volumes:
      - /var/run/docker.sock:/var/run/docker.sock

Any tips?
thank you

2

Share your full Traefik static and dynamic config, and docker-compose.yml if used.

Which user is active inside Docker container?

3

Hi, thanks for answering.
Her is a link to traefik.yml
and a link to fileConfig.yml
Here is the docker-compose.yml

How do I know for sure what user is active inside the docker?
It is supposed to be "dockeruser"

The user should have access.
When running the command stat /var/run/docker.sock, it says:

stat /var/run/docker.sock
  File: /var/run/docker.sock
  Size: 0               Blocks: 0          IO Block: 4096   socket
Device: 17h/23d Inode: 697         Links: 1
Access: (0660/srw-rw----)  Uid: (    0/    root)   Gid: (  997/  docker)
Access: 2024-03-07 14:02:36.128012382 +0100
Modify: 2024-02-26 14:55:19.239746804 +0100
Change: 2024-02-26 14:55:19.243746804 +0100

and the user docker user is member of the docker group, as stated by groups dockeruser:

dockeruser : dockeruser sudo docker
4

Running inside or outside the container?

Note that you can't have multiple traefik static config, either traefik.yml, compose command or env vars,

5

Not sure what happened, but after a apt update && apt upgrade and a reboot, it seems that the errors are gone.
I see this in the log:
Provider connection established with docker 25.0.4 (API 1.44)" providerName=docker
I'm guessing that is a good thing.

But I still cannot see other containers in the traefik dashboard.

For example code_server:

version: "3.8"
services:
  code_server:
    container_name: code_server
    restart: unless-stopped
    image: lscr.io/linuxserver/code-server:latest
    networks:
      - elastic
    volumes:
      - ./data:/config
      - /home/dockeruser/docker:/1_Docker_Containers
    labels:
      traefik.enable: true
      traefik.http.routers.code_server.rule: Host("cs.domain.tld")
      traefik.http.routers.code_server.entryPoints: https
      traefik.http.routers.code_server.tls: true
    environment:
      - TZ=Europe/Oslo
      - PASSWORD=Password02
      - PUID=1001
      - PGID=1001
    ports:
      - 8444:8443
networks:
  elastic:
    external: true
6

I'm aware. And as far as I know, I don't have any multiple entries active. There are a bunch that are commented out, though

7

You labels are in JSON style, but need to be in ENV VAR style.

8

You mean like this:

labels:
      - traefik.enable = true
      - traefik.http.routers.code-server.rule = Host('cs.domain.tld')
      - traefik.http.routers.code-server.entryPoints = https
      - traefik.http.routers.code-server.tls = true

Didn't help

9

Like this:

labels:
      - traefik.enable=true
      - traefik.http.routers.mywhoami.rule=Host(`whoami.example.com`)
      - traefik.http.services.mywhoami.loadbalancer.server.port=80

Source: simple Traefik example

10

This did the trick!
Aaah, hours and hours banging head against the wall are finally over!

Thank you, thank you, THANK YOU

11

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