allow specyfing pod labels and annotations (#12)

Signed-off-by: Jonasz Łasut-Balcerzak <jonasz.lasut@gmail.com>

Author: jonasz-lasut

apis/resourcestatemetrics/definition.yaml

@@ -39,6 +39,20 @@ spec:
                               or a specific version tag.
                             type: string
                         type: object
+                      podMetadata:
+                        description: "Pod's metadata. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata"
+                        properties:
+                          labels:
+                            description: "Map of string keys and values that can be used to organize and categorize (scope and select) objects. May match selectors of replication controllers and services. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels"
+                            additionalProperties:
+                              x-kubernetes-preserve-unknown-fields: true
+                            type: object
+                          annotations:
+                            description: "Annotations is an unstructured key value map stored with a resource that may be set by external tools to store and retrieve arbitrary metadata. They are not queryable and should be preserved when modifying objects. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/annotations"
+                            additionalProperties:
+                              x-kubernetes-preserve-unknown-fields: true
+                            type: object
+                        type: object
                       replicas:
                         description: Number of controller replicas to run. Defaults to 1 for
                           high availability consider 2 or more.

examples/xr-rsm.yaml

@@ -17,6 +17,11 @@ spec:
       image:
         repository: xpkg.crossplane.io/crossplane-contrib/resource-state-metrics-server
         tag: v0.3.0
+      podMetadata:
+        labels:
+          example-label: example-label-value
+        annotations:
+          example-annotation: example-annotation-value
       resources:
         limits:
           cpu: 200m

functions/rsm/05-deployment.yaml.gotmpl

@@ -20,10 +20,19 @@ spec:
       app.kubernetes.io/name: resource-state-metrics
   template:
     metadata:
+      {{- with $xr.spec.parameters.deployment.podMetadata.annotations }}
+      annotations:
+        {{- range $k, $v := . }}
+        {{ $k }}: {{ $v }}
+        {{- end }}
+      {{- end }}
       labels:
         app.kubernetes.io/component: exporter
         app.kubernetes.io/name: resource-state-metrics
         app.kubernetes.io/version: 0.0.1
+        {{- range $k, $v := $xr.spec.parameters.deployment.podMetadata.labels }}
+        {{ $k }}: {{ $v }}
+        {{- end }}
     spec:
       automountServiceAccountToken: true
       serviceAccountName: resource-state-metrics

tests/test-rsm/test.yaml.gotmpl

@@ -548,10 +548,13 @@ items:
               app.kubernetes.io/name: resource-state-metrics
           template:
             metadata:
+              annotations:
+                example-annotation: example-annotation-value
               labels:
                 app.kubernetes.io/component: exporter
                 app.kubernetes.io/name: resource-state-metrics
                 app.kubernetes.io/version: "0.0.1"
+                example-label: example-label-value
             spec:
               automountServiceAccountToken: true
               containers: