TrafficRoutingError with Traefik v3 (traefik.io/v1alpha1) on argo-rollouts v1.8.3

[ayanhamza]

Hi 👋

We are facing a TrafficRoutingError when using Argo Rollouts v1.8.3 with Traefik v3 CRDs (traefik.io/v1alpha1).

Although all required Traefik CRDs and resources exist and are valid, the rollout controller fails with:

TrafficRoutingError: the server could not find the requested resource

This looks like an incompatibility between argo-rollouts v1.8.3 and Traefik v3 API group (traefik.io).

Environment

Argo Rollouts version: v1.8.3 (stable)

Traefik CRDs: traefik.io/v1alpha1 (Traefik v3)

argoproj/argo-rollouts:v1.8.3

Rollout spec (Traefik traffic routing)

strategy:
  canary:
    stableService: interactions-cases-management-stable
    canaryService: interactions-cases-management-canary
    trafficRouting:
      traefik:
        weightedTraefikServiceName: interactions-cases-management

Existing TraefikService (verified)

apiVersion: traefik.io/v1alpha1
kind: TraefikService
metadata:
  name: interactions-cases-management
  namespace: digital-ns
spec:
  weighted:
    services:
      - name: interactions-cases-management-stable
        port: 8080
      - name: interactions-cases-management-canary
        port: 8080

CRDs are present:

traefikservices.traefik.io
ingressroutes.traefik.io

kubectl api-resources confirms availability.

Logs from argo-rollouts controller

time="2025-12-22T13:19:37Z" level=warning msg="the server could not find the requested resource" event_reason=TrafficRoutingError namespace=digital-ns rollout=interactions-cases-management
time="2025-12-22T13:19:37Z" level=error msg="rollout syncHandler error: the server could not find the requested resource"

Expected behavior

Argo Rollouts should be able to:

recognize TraefikService in traefik.io/v1alpha1

update weights in spec.weighted.services[]

proceed with canary steps without TrafficRoutingError

Actual behavior

Rollout reconciliation fails

Controller reports requested resource not found

Canary traffic routing never progresses

Question

Is Traefik v3 (traefik.io/v1alpha1) officially supported in argo-rollouts v1.8.3?
If not:

which version introduces proper support?

is there a compatibility matrix for Traefik major versions vs argo-rollouts?

[idurgakalyan]

#4572, should resolve it.