2 docker containers on same port?

Submitted ⁨⁨1⁩ ⁨year⁩ ago⁩ by ⁨Fjor@lemm.ee⁩ to ⁨selfhosted@lemmy.world⁩

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

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Comments

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webnet@lemmy.world ⁨1⁩ ⁨year⁩ ago
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. registry.hub.docker.com/r/…/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
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- Fjor@lemm.ee ⁨1⁩ ⁨year⁩ ago
  Ah thanks! That solves one of the services at least. Merciii <3
  
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thepianistfroggollum@lemmynsfw.com ⁨1⁩ ⁨year⁩ ago
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.

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- breadsmasher@lemmy.world ⁨1⁩ ⁨year⁩ ago
  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
  
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  - Fjor@lemm.ee ⁨1⁩ ⁨year⁩ 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: …
    
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  - thepianistfroggollum@lemmynsfw.com ⁨1⁩ ⁨year⁩ ago
    Fair enough, but OPs problem can be solved by changing a 0 to a 1 in a single file.
    
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- Fjor@lemm.ee ⁨1⁩ ⁨year⁩ ago
  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.
  
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  - thepianistfroggollum@lemmynsfw.com ⁨1⁩ ⁨year⁩ 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.
    
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  - breadsmasher@lemmy.world ⁨1⁩ ⁨year⁩ ago
    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
    
    for example
    
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Decronym@lemmy.decronym.xyz ⁨1⁩ ⁨year⁩ 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

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

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Appoxo@lemmy.dbzer0.com ⁨1⁩ ⁨year⁩ 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

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SheeEttin@lemmy.world ⁨1⁩ ⁨year⁩ ago
docs.docker.com/compose/…/compose-file-v3/#ports

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