[Feature Request]: Support for Service@swarm provider for Traefik v3+ & overrides for default overrides

[Fredzer]

Hey, I setup MM within a Docker Swarm environment and made smooth progress to a stable setup but I noticed that all my services were being duplicated and that wasn't clearing up after initial setup. During MM setup I also updated Traefik to 3.2.1 to try and resolve resource-override.yml issues where it autogenerated middleware features that my v2.11 did not support preventing Traefik from loading any more dynamic files...

Traefik v3 @docker provider no longer directly supports swarm settings and @swarm has been introduced for that specifically.

The resource-overrides.yml takes a copy of every service and stores it as @docker which Traefik now detects as a new dynamic @file service and loads it only to report service down error.
Also every service seems to default to a "letsencrypt" certificateResolver is not configured anywhere. The only one I have configured is called "main" and used by almost every service so I guess this is just a default? Possibly due to incomplete detection via @ provider disassociation? I've battled with MM over the resource-overrides.yml with correct info but it really puts up a fight and just blats in the overrides (fair enough I guess) a human override would be handy.

If any if this is human error then my bad but I've looked around and as usual there is zero mention of swarm and the src only takes @docker into account.

I located the logic under the default-generator
services/config_generator.go

398 - 399

 // For Docker environments when using Traefik API, prefer docker provider providerSuffix := "docker

555 - 558

 // If using Traefik API, consider using docker for appropriate sources if activeDSConfig.Type == models.TraefikAPI { if models.DataSourceType(sourceType) == models.TraefikAPI { providerSuffix = "docker" } }

util/id_normalizer.go
75 - 78

// For Traefik API, prefer docker provider for matching source types if activeDataSourceType == "traefik" && sourceType == "traefik" { return "@docker" }

This probably wont be a priority with swarm being somewhat of a dying breed, but I'd be glad to provide any info or output needed to get a fix out. Currently the app is shutdown paused as it was causing chaos 😅

Setup details
Traefik (now) v3.2.1
MM Version - image: hhftechnology/middleware-manager:traefik-int (latest)
MM Traefik Standalone compose bolted onto my existing Traefik compose (plus Swarm compatible modifications)
Docker v28.1.1 Swarm - 4 node 4 manager (1 not prod)
Traefik has docker.sock access deployed x3
MM is within the same compose.yml swarm deployed but limited to x1
Around 80 services with 100+ tasks running
Shared Cephfs where all the required bind mounts are accessed by Traefik + MM
MM has been able to retrieve all information and populate its DB via API which is https behind Traefik.
Web UI has all services listed but existing middlewares are not displaying possibly linked to provider link issues.

I have yet to generate any debug output as I found a cause but happy to run any tests :)
Thanks