feat(argo-rollouts): Add missing configmap for 3rd party metrics providers

Signed-off-by: yu-croco <yu.croco@gmail.com>

charts/argo-rollouts/README.md

@@ -85,6 +85,7 @@ For full list of changes please check ArtifactHub [changelog].
 | controller.image.tag | string | `""` | Overrides the image tag (default is the chart appVersion) |
 | controller.initContainers | list | `[]` | Init containers to add to the rollouts controller pod |
 | controller.livenessProbe | object | See [values.yaml] | Configure liveness [probe] for the controller |
+| controller.metricProviderPlugins | object | `{}` | Configures 3rd party metric providers for controller |
 | controller.metrics.enabled | bool | `false` | Deploy metrics service |
 | controller.metrics.serviceMonitor.additionalAnnotations | object | `{}` | Annotations to be added to the ServiceMonitor |
 | controller.metrics.serviceMonitor.additionalLabels | object | `{}` | Labels to be added to the ServiceMonitor |

charts/argo-rollouts/templates/controller/configmap.yaml

@@ -0,0 +1,12 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: argo-rollouts-config
+  namespace: {{ .Release.Namespace | quote }}
+  labels:
+    app.kubernetes.io/component: {{ .Values.controller.component }}
+    {{- include "argo-rollouts.labels" . | nindent 4 }}
+data:
+  {{- with .Values.controller.metricProviderPlugins }}
+    {{- toYaml . | nindent 2 }}
+  {{- end }}

charts/argo-rollouts/values.yaml

@@ -169,6 +169,13 @@ controller:
     # - mountPath: /etc/ssl/certs
     #   name: my-certs
 
+  # -- Configures 3rd party metric providers for controller
+  ## Ref: https://argo-rollouts.readthedocs.io/en/stable/analysis/plugins/
+  metricProviderPlugins: {}
+    # metricProviderPlugins: |-
+    #   - name: "argoproj-labs/sample-prometheus" # name of the plugin, it must match the name required by the plugin so that it can find its configuration
+    #     location: "file://./my-custom-plugin" # supports http(s):// urls and file://
+
 serviceAccount:
   # -- Specifies whether a service account should be created
   create: true