How to monitor multiple docker instances?

[BigCrustyOne]

I run docker instances on several different NAS, mini PC's, and NUC's on our LAN. I have WUD working perfectly on the host device and notifications for the host device are working via Discord, but I'm getting no joy trying to connect to my other docker instances (DOCKER1 & DOCKER2). In my wud.yml file, I'm using something along the lines of :

environment:
    - WUD_WATCHER_DOCKER1_HOST=192.168.0.10
    - WUD_WATCHER_DOCKER1_CRON=0 1 * * *
    - WUD_WATCHER_DOCKER1_SOCKET=/volume1/var/run/docker.sock
    - WUD_WATCHER_DOCKER2_HOST=192.168.0.20
    - WUD_WATCHER_DOCKER2_CRON=0 1 * * *
    - WUD_WATCHER_DOCKER2_SOCKET=/volume1/var/run/docker.sock

WUD sees the watcher and lists it in the web page, but it does not find any containers for the remote docker instances.

What am I doing wrong here? ?

TIA

[txelu]

Check whether the port 2375 o 2376 (secure port using TLS) is open and listening in those remote instances. If not, you need to modify the /etc/docker/daemon.json to enable it. This could be an example of how they should look like:

{
  "log-driver": "journald",
  "hosts": [
    "unix:///var/run/docker.sock",
    "tcp://0.0.0.0:2375"
  ]
}

You need to restart the docker service after making those changes.

[kramttocs]

I would use https://github.com/Tecnativa/docker-socket-proxy
Allows granular control.
I just have WUD 'watching' versions now so am using:

name: dockerproxy
services:
    dockerproxy:
        privileged: true
        container_name: dockerproxy
        volumes:
            - /var/run/docker.sock:/var/run/docker.sock
        ports:
            - 0.0.0.0:2375:2375
        image: tecnativa/docker-socket-proxy
        environment:
            - CONTAINERS=1
            - IMAGES=1