this post was submitted on 12 Oct 2023

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How to specify port number in compose file that is behind vpn container (lemm.ee)

submitted 8 months ago* (last edited 8 months ago) by [email protected] to c/selfhosted

19 comments fedilink hide all child comments

Hi there!

I'm trying to set up two services (through docker) both of which use port 8080 by default. However I am wanting these to services to sit behind a VPN using Gluetun. I added both of the ports I want to use to the compose file, but this just leads to only one of the services working as the other one will say "port already in use". How can I strictly tell these services what port they shall use in the compose file?

This is how I did it so far;

docker-compose.yml

***
version: '3'
services:
  vpn:
   image: qmcgaw/gluetun:latest
   container_name: vpn
   restart: unless-stopped
   cap_add:
    - NET_ADMIN
   environment:
      - VPN_SERVICE_PROVIDER=custom
      - VPN_TYPE=wireguard
      - VPN_ENDPOINT_IP=####
      - VPN_ENDPOINT_PORT=####
      - WIREGUARD_PUBLIC_KEY=####
      - WIREGUARD_PRIVATE_KEY=####
      - WIREGUARD_PRESHARED_KEY=####
      - WIREGUARD_ADDRESSES=####
   devices:
    - /dev/net/tun:/dev/net/tun
   ports:
    - '8080:8080'
    #VPN
    - 8888:8888/tcp
    - 8388:8388/tcp
    - 8388:8388/udp
    - 8000:8000/tcp
    - 8584:8584
    - 8585:8585
   volumes:
    - /docker/appdata/gluetun:/gluetun
  sabnzbd:
    image: lscr.io/linuxserver/sabnzbd:latest
    container_name: sabnzbd
	network_mode: container:vpn
    volumes:
      - /docker/appdata/sabnzbd/data:/config
    restart: unless-stopped
  qbittorrent:  
    container_name: qbittorrent  
    image: linuxserver/qbittorrent:latest
    restart: unless-stopped
    network_mode: container:vpn  
    volumes:  
     - /docker/appdata/qbitorrent:/config

top 19 comments

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[–] webnet 6 points 8 months ago (1 children)

qBittorrent has an option to define the WEBUI_PORT. If you want to access it on say, port 8585, set this environment variable to WEBUI_PORT=8585. Then in gluetun, continue to reference it as you do above. Hope this helps. https://registry.hub.docker.com/r/linuxserver/qbittorrent

  qbittorrent:  
    container_name: qbittorrent  
    image: linuxserver/qbittorrent:latest
    environment:
      - WEBUI_PORT=8585
    restart: unless-stopped
    network_mode: container:vpn  
    volumes:  
     - /docker/appdata/qbitorrent:/config

[–] [email protected] 4 points 8 months ago

Ah thanks! That solves one of the services at least. Merciii <3

[–] [email protected] 1 points 8 months ago* (last edited 8 months ago)

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
HTTP	Hypertext Transfer Protocol, the Web
HTTPS	HTTP over SSL
IP	Internet Protocol
SSL	Secure Sockets Layer, for transparent encryption
VPN	Virtual Private Network

4 acronyms in this thread; the most compressed thread commented on today has 10 acronyms.

[Thread #213 for this sub, first seen 12th Oct 2023, 16:55] [FAQ] [Full list] [Contact] [Source code]

[–] [email protected] 1 points 8 months ago (2 children)

Just use a different port number. I'm not sure why it's necessary to use the same one since you can change qbittorrent's port in the config files.

[–] breadsmasher 5 points 8 months ago (2 children)

You can also map different ports to the container. For sake of argument lets say qtorrent had a fixed port you cannot change, that’s just what the application listens to. You can then map a different container port to that application port.

tldr, OP, you can’t have two containers in docker on the same container port

[–] [email protected] 1 points 8 months ago (1 children)

Fair enough, but OPs problem can be solved by changing a 0 to a 1 in a single file.

[–] [email protected] 1 points 8 months ago

how haha

[–] [email protected] 1 points 8 months ago

Right, my bad for the misleading/wrong title. This is my question - how do i map a port to a container that uses network_mode: ...

[–] [email protected] 1 points 8 months ago* (last edited 8 months ago) (2 children)

Sorry that was my question, dont want to use the port twice, I want to tell the compose file what to use for each container, but I dont know how.

Fixed the title, mb

[–] breadsmasher 1 points 8 months ago* (last edited 8 months ago) (1 children)

In the VPN service you just expose the port you want and map it to the listener port on the service

vpn: ports: - 5000:8080 - 6000:8080

where you have

servicea listening on 8080 and serviceB on 8080 but exposed on 5000 and 6000 in the VPN service

for example

[–] [email protected] 1 points 8 months ago (1 children)

sorry im still quite new to this.. do u have an example of another compose file that does this? Not sure where I put what.

[–] breadsmasher 1 points 8 months ago* (last edited 8 months ago) (2 children)

On my phone so I haven’t got the access to give you a good example.

You see in your compose file in your original post you have ‘8080:8080’ under ports?

You should be able to add another line, the left hand side of the colon exposing a different port like so

…
ports: 
    - ‘8080:8080’
    - ‘9090:9090’ 
…

then one service you can access on port 8080 and the other you access on 9090

then under each service you want to expose you add the other port mappings

qtorrent:
    ports: 
        - 8080:8080

sabnzb:
    ports: 
        - 9090:8080

edit - so you should end up with the vpn container exposing 8080 which points to the service exposing 8080 which maps to application listening on 8080

and the same for 9090 -> 9090 -> 8080

[–] [email protected] 1 points 8 months ago (1 children)

but I thought the containers had to have "network_mode: container:vpn", in order to strictly only be able to communicate through the VPN.

[–] breadsmasher 1 points 8 months ago (1 children)

When I am home Ill get an example from my setup 👍

[–] [email protected] 1 points 8 months ago

mercii :)

[–] [email protected] 1 points 8 months ago

when I do this I get the error message that the ports are already in use by the vpn container :|

[–] [email protected] 1 points 8 months ago

Ah, well the qbittorrent config file should live in the directory you mapped to /config. I think you can pull the default one and edit it for your container.

[–] [email protected] 1 points 8 months ago* (last edited 8 months ago)

You could join two different networks

And bind the port to that.

Example:

    ports: 
       - 8880:8880 #HTTP port #optional 
       - 8443:8443 #HTTPS port 
       - 3478:3478/udp 
       - 10001:10001/udp 
       - 8080:8080 
       - "10.0.0.253:1900:1900/udp" #optional 
       - 8843:8843 #optional 
       - 6789:6789 #optional 
       - 5514:5514/udp #optional 
     networks: 
       service: 
       net: 
         ipv4_address: 10.0.0.253

In that case I binded the container to the service network but needed a static IP reachable by outside devices.
So I created a macvlan adapter, binded the port 1900 to that adress and all was fine.
Should probably work for your use case.

[–] SheeEttin 0 points 8 months ago

https://docs.docker.com/compose/compose-file/compose-file-v3/#ports