docker compose, dockerfile_inline, custom build and... DIUN!

[lp35]

Hello,

I have a custom container (see below) for my Caddy instance. I would like to get a notification when a new image is available, but I don't know how to configure Diun for this specific use case.

Any clues?

Cheers!

services:
  caddy:
    build:
      context: .
      args:
        - CADDY_VERSION=2.10.0
      dockerfile_inline: |
        ARG CADDY_VERSION=2.10
        FROM caddy:$${CADDY_VERSION}-builder AS builder
        RUN xcaddy build \
            --with github.com/lucaslorentz/caddy-docker-proxy/v2 \
            --with github.com/caddy-dns/desec
        FROM caddy:$${CADDY_VERSION}-alpine
        COPY --from=builder /usr/bin/caddy /usr/bin/caddy
        CMD ["caddy", "docker-proxy"]

[crazy-max]

I guess you mean when caddy:$${CADDY_VERSION}-builder has a new update?

If that's the case we don't handle built images but you could use the dockerfile provider: https://crazymax.dev/diun/providers/dockerfile/

[ideabucket]

Assuming OP's use case for caddy is the same is mine, what's needed is to be able to tell Diun "Even though this is a built image, track a specified image in the registry as though it was this image". In this case, the idea is not to be updated on new versions of the locally built image, but to get notified when docker.io/library/caddy:builder is updated, even though that is not the actual image running locally (so the local image can be rebuilt from the update version).

Is this what the diun.hub_link label is for? It's not entirely clear from the documentation.