Support setting `loadBalancerClass` for loadbalancer services

[viceice]

Please, answer some short questions which should help us to understand your problem / question better?

• Which image of the operator are you using? registry.opensource.zalan.do/acid/postgres-operator:v1.11.0 (via helm chart)
• Where do you run it - cloud or metal? Kubernetes or OpenShift? Bare Metal K3s
• Are you running Postgres Operator in production? yes
• Type of issue? feature request

We use different kinds of loadbalancers on our cluster, so we need to set spec.loadBalancerClass¹, so the right loadbalancer provider can set the appropriate values. Currently we can only use annotations via replicaServiceAnnotations which issn't enough.
Maybe a generic spec field makes sense, so all kind of service overrides can be used.

Footnotes

1. https://kubernetes.io/docs/concepts/services-networking/service/#load-balancer-class ↩

[FxKu]

sounds like a good PR to me :)
You can define another global config option to specify the class where the default is empty. Type should be *string then.