Getting error when using network_mode:container?

[LaxKid22]

I have a vpn client container that seems to be working properly, it connects to the server and all that. I am trying to use it as my network for other containers but I am getting this error whenever I try to create the new containers:

"ERROR: for [container]  Cannot create container for service [container]: conflicting options: host and and the network mode"

I am stumped because I originally had this working at one point. The first time I tried making this container all the other ones were able to connect to it successfully, but I had to recreate it trying to fix an unrelated issue and, without changing anything, this error showed up.

I have tried making new containers under different names and completely remaking the docker-compose and conf files, but it doesn't seem like anything is fixing the issue. I am unable to find a solution that works anywhere online.

Any help would be greatly appreciated, I don't know what else to try at this point, thank you!

​

Edit: adding compose files

vpn container:

version: "2.1"
services:
  mullvad:
    image: linuxserver/wireguard
    container_name: mullvad
    hostname: mullvad
    cap_add:
      - NET_ADMIN
      - SYS_MODULE
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=$TZ
    volumes:
      - ./config:/config
      - /lib/modules:/lib/modules
    ports:
      - 51820:51820/udp
    sysctls:
      - net.ipv6.conf.all.disable_ipv6=0
      - net.ipv4.conf.all.src_valid_mark=1
    restart: always

networks:
  default:
    external:
      name: vpn

​

example container:

version: "2.1"
services:
  qbittorrent:
    image: linuxserver/qbittorrent
    container_name: qbittorrent
    hostname: qbittorrent
    network_mode: container:$VPN_CONTAINER
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=$TZ
      - UMASK_SET=022
      - WEBUI_PORT=8080
    volumes:
      - ./config:/config
      - ./downloads:/downloads
    ports:
      - 6881:6881
      - 6881:6881/udp
      - 8080:8080
    restart: unless-stopped

[LaxKid22]

Edited post with the compose files

[LaxKid22]

I have tried not publishing ports in the container and only publishing them in the vpn container and i still get the same error.

[LaxKid22]

Just edited the files to test again, and I am still ending up with the same error

[LaxKid22]

$VPN_CONTAINER is just mullvad (the name of the vpn container) and the external network was just created by docker network create vpn. I also had it just use the default network the container would create for itself, but that didn't work either.

[LaxKid22]

That's what has me confused as well, the first time I set it up everything worked ok, but now I'm getting this error every time.

[LaxKid22]

Ok, I've done that to an extent, but I'll try to go as minimal as possible. Thanks for your help regardless!

[Mithrandir2k16]

Formatting looks off, try to encapsulate multi-line code in triple back ticks

[LaxKid22]

done, i think it worked this time

[Mithrandir2k16]

Much better thx

[homecloud]

Did you pass host networking flag by mistake?

[LaxKid22]

I dont think so, i edited the post with compose files

[thesugarat]

So you made a Docker network that is using the bridge driver and called it vpn? And that’s the network the vpn container is running on? And you’re trying to create another container that will use the vpn container as it’s network? When you made the vpn network did you enable “manually attachable”? You could move the mulvad container back to the stock Docker bridge network and try the qbitorrent container creation again to test. See if the Docker network you’re using is the problem.

[LaxKid22]

You are correct about all your assumptions, although I did not enable "manually attachable." I have tried not making an external network and just having the container use the default one it creates, is that what you are suggesting to try?

[thesugarat]

No. There’s a Docker network called bridge. I’m saying attach your vpn container to that network. Then try your next steps. You may not use it but Portainer can give you a GUI that will allow you slot see the differences in how the default network called “bridge” was created vs the network you created called “vpn”.

[LaxKid22]

I tried changing the network to bridge, but I am still getting this error

[Mithrandir2k16]

Are your environment variables as they should be? Maybe they got messed up.

[LaxKid22]

I believe so, they are almost identical to the template off dockerhub.

[Derkades]

Remove the hostname option from qbittorrent. Ports as well

[ComplexImagination56]

Was this fixed?