Update README.md - add section about two or more replicas with traefik

[supermario18b]

Pull Request

Description of the change

It was explained how to create a traefik ingressRoute Resource that uses sticky sessions

Benefits

Users can login when more nextcloud replicas are used

Possible drawbacks

I don't see any

Applicable issues

when more replicas

[jessebot]

awesome, thanks for this! I've made the tiniest suggestion and then this can merged :)

[wrenix]

Maybe we should use annotations and write docu for multiple ingress-controller:

• here for traefik: https://doc.traefik.io/traefik/routing/providers/kubernetes-ingress/#on-service
• here for nginx: https://kubernetes.github.io/ingress-nginx/user-guide/nginx-configuration/annotations/#session-affinity

• here for haproxy: https://haproxy-ingress.github.io/docs/configuration/keys/#affinity

  Your docu is very traefik specifiy and would be maybe replaced with gateway-api and standard over multiple ingress-controller: https://gateway-api.sigs.k8s.io/implementations/ Current state for session policy: https://gateway-api.sigs.k8s.io/geps/gep-1619/

[jessebot]

@wrenix I feel like having a full ingress section of the docs would be nice, and we can certainly approach that later if you'd like, but I think getting this merged is still a good idea in the meantime. In particular, I've seen a lot of hyper around the new gateway api (I'm also hyped!), but haven't actually played with it yet. I'd be down for some docs on it as well.