Add ability to set k8s fields not defined in the EnvoyProxy provider config

[arkodg]

Description:
Envoy Gateway allows users to customize the Envoy Proxy fleet resources such as - Deployment, Service and HPA. These customizations are a subset of the the entire resource spec

gateway/api/v1alpha1/shared_types.go

Line 54 in 5d691f2

type KubernetesDeploymentSpec struct {

Would be great if we can add a generic way to patch/set any field in the above resources so

• users can make edits without waiting for the field to be added and exposed in a future release
• EG doesnt need to add all fields, especially ones such as hostNetwork that are not common case scenarios

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Any extra documentation required to understand the issue.

[Xunzhuo]

@zirain Thoughts on this ?

[zirain]

#2337 (comment)

[arkodg]

we could allow users to specify a merge patch (strategic or json merge patch) https://kubernetes.io/docs/tasks/manage-kubernetes-objects/update-api-object-kubectl-patch/#use-a-strategic-merge-patch-to-update-a-deployment

[arkodg]

thoughts on ?

merge:
  type: StrategicMerge
  spec:
    .......

[zirain]

thoughts on ?

merge:
  type: StrategicMerge
  spec:
    .......

looks good to me

[github-actions]

This issue has been automatically marked as stale because it has not had activity in the last 30 days.