Can I run multiple instances on one server?

[devsi]

I have some friends itching to play, and right now I have a dedicated server hosting 4 of us. I was hoping to set up a second docker instance (or maybe a second config?) and run it on the same hardware but with a different static IP.

a) What's the ideal way to go about doing this?
b) Would my existing AWS Lightsail instance : 4 GB RAM, 2 vCPUs, 80 GB SSD be good enough for this? Right now the CPU utilization is really low, and RAM is keeping under 2GB so I feel like it would run, but might get close to its limits. Anyone experienced this set up before?

Thanks friends!

[mbround18]

Should be able to run two instances, though you will have to do some docker magic with the second IP address

https://docs.docker.com/config/containers/container-networking/

[mbround18]

@meg5 I can throw one together for you in a day or so, did you want to reduce space requirements? or just run two instances?

(Reducing space requirements would result in not being able to install mods on the servers without installing it on both servers)

[coreyaboy]

I'm also interested in an example docker-compose file for running more than one instance. I can't speak for meg5, but in my use case, the amount of extra space that duplicating the game data a few times really isn't an issue. The flexibility to install different mods on each instance might also give me room to be 'clever' with a thing or two.

In fact, I would so appreciate it that I'm guna go find your tip jar.

[mbround18]

Thank you @coreyaboy <3

Running Multiple Instances on one Server

version: "3"
services:
  valheim-01:
    image: mbround18/valheim:1.3.4
    environment:
      PORT: 2456
      NAME: "Server 01"
      PASSWORD: "Password 01"
      TZ: "America/Los_Angeles"
      AUTO_UPDATE: 1
      AUTO_UPDATE_SCHEDULE: "0 1 * * *"
      TYPE: Vanilla
    ports:
      - "2456:2456/udp"
      - "2457:2457/udp"
      - "2458:2458/udp"
    volumes:
      - ./server-01/saves:/home/steam/.config/unity3d/IronGate/Valheim
      - ./server-01/server:/home/steam/valheim
      - ./server-01/backups:/home/steam/backups
  valheim-02:
    image: mbround18/valheim:1.3.4
    environment:
      PORT: 2456
      NAME: "Server 02"
      PASSWORD: "Password 02"
      TZ: "America/Los_Angeles"
      AUTO_UPDATE: 1
      AUTO_UPDATE_SCHEDULE: "0 1 * * *"
      TYPE: ValheimPlus
    ports:
      - "2459:2456/udp"
      - "2460:2457/udp"
      - "2461:2458/udp"
    volumes:
      - ./server-02/saves:/home/steam/.config/unity3d/IronGate/Valheim
      - ./server-02/server:/home/steam/valheim
      - ./server-02/backups:/home/steam/backups
  valheim-03:
    image: mbround18/valheim:1.3.4
    environment:
      PORT: 2456
      NAME: "Server 03"
      PASSWORD: "Password 03"
      TZ: "America/Los_Angeles"
      AUTO_UPDATE: 1
      AUTO_UPDATE_SCHEDULE: "0 1 * * *"
      TYPE: BepInExFull
    ports:
      - "2462:2456/udp"
      - "2463:2457/udp"
      - "2464:2458/udp"
    volumes:
      - ./server-03/saves:/home/steam/.config/unity3d/IronGate/Valheim
      - ./server-03/server:/home/steam/valheim
      - ./server-03/backups:/home/steam/backups

[meg5]

@mbround18 - thanks for that! I wanted to run multiple instances on one server. Looks like I have a similar setup except the "PORT" values are different and I dont have a Type value. I think what is happening for me is that each instance is taking about 80% of 4gb of memory and only one has enough resources to start/run one at a time. Do you have 4GB for each instance?

[mbround18]

@mbround18 - thanks for that! I wanted to run multiple instances on one server. Looks like I have a similar setup except the "PORT" values are different and I dont have a Type value. I think what is happening for me is that each instance is taking about 80% of 4gb of memory and only one has enough resources to start/run one at a time. Do you have 4GB for each instance?

My Valheims a bit different ;) it runs in kubernetes with an average usage of 600mb to 3.5gb. Typically, yes, you will need about 4gb of ram to run each instance on a normal docker setup.