Interfaces of Docker networks keep switching randomly

[zapp2me]

Hi,

I'm using WatchYouLAN to monitor my local network (192.168.1.0/24) but sometimes I get all my other containers from my traefik docker network (172.18.x.x). I know I can set the interface I want to scan, but apperently eth0 and eth1 switch around every now and then.

I already tried to give them names in my Docker Compose file, since they are supposed to be sorted alphabetically. I also tried to define the traefik network as internal: true since these are supposed to be set up last when the container is built. But nothing has helped so far.

Lastly I tried to use an ARP string (-gNx 192.168.1.0/24 -I eth0, -gNx 192.168.1.0/24 -I eth1) but I still get results from the 172.18.x.x network.

Any ideas on how I can make sure to only scan for devices in my actual LAN?

[jaadth]

Took awhile but found this. Use "priority" in docker compose. Don't forget to have "privileged: true".

https://stackoverflow.com/questions/42926294/docker-compose-specify-which-interface-will-connect-to-each-network-when-havin/54249765#54249765

[zapp2me]

Thank you very much. I somehow did not find this setting myself

[jaadth]

Crap, I've been testing over and over since writing the last response. That does NOT work. However, I found this instead.

https://gist.github.com/jfellus/cfee9efc1e8e1baf9d15314f16a46eca

So like this...

    networks:
      ifs0:
        interface_name: eth0
      ifs1:
        interface_name: eth1
      ifs2:
        interface_name: eth2