Add support for extraManifests

[CiucurDaniel]

Would it be possible to add a new value called extraManifests. As the name implies, it will provide means to deploy extra manifests as an array.

This is something which already exists in other charts such as the popular kube-prometheus-stack.

The use case for this is, for example, suppose you are using Istio on your cluster and you would like to be able to specify a Virtual Service definition to be deployed with the chart used for accessing your zipkin ui.

eg:

 # Extra manifests to deploy as an array
  extraManifests: 
    - apiVersion: networking.istio.io/v1beta1
      kind: VirtualService
      metadata:
        name: zipkin-vs
        namespace: zipkin
      spec:
        hosts:
        - "some-host.com"
        gateways:
        - some/gateway
        http:
        - match:
          - uri:
              prefix: "/zipkin"
          route:
          - destination:
              host: zipkin
              port:
                number: 9411

Implementation should be simple:

# templates/extra-objects.yaml

{{ range .Values.extraManifests }}
---
{{ tpl (toYaml .) $ }}
{{ end }}

[codefromthecrypt]

would you be ok making this and a test in https://github.com/openzipkin/zipkin-helm/tree/master/charts/zipkin/ci?

[CiucurDaniel]

Yes, I will try to submit a PR for this. (Excuse my late reply)

[CiucurDaniel]

@codefromthecrypt done, submitted a PR.