Hi @Emmanuel , looks like the traefik ingress differs slightly from the nginx example, but basically what you want is a sticky session to the service. I suggest setting both of the annotations:
traefik.ingress.kubernetes.io/service.sticky.cookie: "true"
traefik.ingress.kubernetes.io/service.sticky.cookie.samesite: "strict"
An referring to Traefik’s docs regarding sticky sessions.
As you’ve noted from the docs “Ingresses are not managed by the Operator because the required configuration is not generic”, and so you will not be able to be able to set this through annotation through the CRD.