Support /status and /scale subresources

[coryodaniel]

Support status and scale subresources

Requires: k8s 1.13 beta

Expected behavior

CRD should generate w/ subresources:

apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
  name: crontabs.stable.example.com
spec:
  group: stable.example.com
  versions:
    - name: v1
      served: true
      storage: true
  scope: Namespaced
  names:
    plural: crontabs
    singular: crontab
    kind: CronTab
    shortNames:
    - ct
  # subresources describes the subresources for custom resources.
  subresources:
    # status enables the status subresource.
    status: {}
    # scale enables the scale subresource.
    scale:
      # specReplicasPath defines the JSONPath inside of a custom resource that corresponds to Scale.Spec.Replicas.
      specReplicasPath: .spec.replicas
      # statusReplicasPath defines the JSONPath inside of a custom resource that corresponds to Scale.Status.Replicas.
      statusReplicasPath: .status.replicas
      # labelSelectorPath defines the JSONPath inside of a custom resource that corresponds to Scale.Status.Selector.
      labelSelectorPath: .status.labelSelector

Will need to support add'l functions on the controller update_status/1 update_scale/1

[coryodaniel]

script for patching status on the HelloOperator example greeting:

url = "https://localhost:6443/apis/hello-operator.example.com/v1/namespaces/default/greetings/hola-server"

conf = K8s.Conf.from_file("~/.kube/config")
request_options = K8s.Conf.RequestOptions.generate(conf)

http_headers = [{"Accept", "application/json"}, {"Content-Type", "application/json"}]

{:ok, %{body: resp}} = HTTPoison.get(url, http_headers, [ssl: request_options.ssl_options])

greeting = Jason.decode!(resp)

patch = %{
  "metadata" => greeting["metadata"],
  "status" => %{
    "conditions" => [
      %{
        "lastTransitionTime" => "2019-01-14T20:13:49Z",
        "lastUpdateTime" => "2019-01-14T20:13:49Z",
        "message" => "Kewl",
        "reason" => "Kewl",
        "status" => "True",
        "type" => "Available"
      }      
    ]
  }
}

body = Jason.encode!(patch)

result = HTTPoison.put("#{url}/status", body, http_headers, [ssl: request_options.ssl_options])

[mruoss]

status and scale resources are supported with Bonny.ControllerV2 (using the customize_crd/1 callback to define subresources and schemas)