[stable/traefik] HorizontalPodAutoscaler (#10288)

* stable/traefik: Add hpa object

Signed-off-by: Ricardo Hernandez <ricardo.hernandez@mongodb.com>

* stable/traefik: bump version

Signed-off-by: Ricardo Hernandez <ricardo.hernandez@mongodb.com>

* stable/traefik: document autoscaling value

Signed-off-by: Ricardo Hernandez <ricardo.hernandez@mongodb.com>

* stable/traefik: Remove trailing whitespace in values

Signed-off-by: Ricardo Hernandez <ricardo.hernandez@mongodb.com>

* Comment autoscaling value

Signed-off-by: Ricardo Hernandez <ricardo.hernandez@mongodb.com>

stable/traefik/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: traefik
-version: 1.59.2
+version: 1.60.0
 appVersion: 1.7.7
 description: A Traefik based Kubernetes ingress controller with Let's Encrypt support
 keywords:

stable/traefik/README.md

@@ -216,6 +216,7 @@ The following table lists the configurable parameters of the Traefik chart and t
 | `tracing.datadog.localAgentHostPort`   | Location of the Datadog agent where spans will be sent                                                                       | `127.0.0.1:8126`                                  |
 | `tracing.datadog.debug`                | Enables Datadog debugging                                                                                                    | `false`                                           |
 | `tracing.datadog.globalTag`            | Apply shared tag in a form of Key:Value to all the traces                                                                    | `""`                                           |
+| `autoscaling`                          | HorizontalPodAutoscaler for the traefik Deployment                                                                           | `{}`                                           |
 
 Specify each parameter using the `--set key=value[,key=value]` argument to `helm install`. For example:
 

stable/traefik/templates/hpa.yaml

@@ -0,0 +1,20 @@
+{{- if .Values.autoscaling }}
+apiVersion: autoscaling/v2beta1
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ template "traefik.fullname" . }}
+  labels:
+    app: {{ template "traefik.name" . }}
+    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+    release: {{ .Release.Name | quote }}
+    heritage: {{ .Release.Service | quote }}
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: {{ template "traefik.fullname" . }}
+  minReplicas: {{ .Values.autoscaling.minReplicas }}
+  maxReplicas: {{ .Values.autoscaling.maxReplicas }}
+  metrics:
+{{ toYaml .Values.autoscaling.metrics | indent 4 }}
+{{- end }}

stable/traefik/values.yaml

@@ -374,3 +374,18 @@ tracing:
   #   localAgentHostPort: "127.0.0.1:8126"
   #   debug: false
   #   globalTag: ""
+
+## Create HorizontalPodAutoscaler object.
+##
+# autoscaling:
+#   minReplicas: 1
+#   maxReplicas: 10
+#   metrics:
+#   - type: Resource
+#     resource:
+#       name: cpu
+#       targetAverageUtilization: 60
+#   - type: Resource
+#     resource:
+#       name: memory
+#       targetAverageUtilization: 60