[stable/prometheus] Adding Vertical Pod Autoscaler support (#17742)

* Adding vertical Pod Autoscaler support to the chart

Signed-off-by: Ali Sattari <ali.sattari@gmail.com>

* EOF fixed in new file

Signed-off-by: Ali Sattari <ali.sattari@gmail.com>

* bumping the right version field!

Signed-off-by: Ali Sattari <ali.sattari@gmail.com>

* fixing a mistake in version bumping

Signed-off-by: Ali Sattari <ali.sattari@gmail.com>

* fixing wrong version bump

Signed-off-by: Ali Sattari <ali.sattari@gmail.com>

* Fixes loop issue

Signed-off-by: Ali Sattari <ali.sattari@gmail.com>

* Bumped chart version, synced app version with master.

Signed-off-by: Ali Sattari <ali.sattari@gmail.com>

* Bumping chart version

Signed-off-by: Ali Sattari <ali.sattari@gmail.com>

* Merge conflict cleanup

Signed-off-by: Ali Sattari <ali.sattari@gmail.com>

stable/prometheus/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: prometheus
-version: 9.7.1
+version: 9.7.2
 appVersion: 2.13.1
 description: Prometheus is a monitoring system and time series database.
 home: https://prometheus.io/

stable/prometheus/README.md

@@ -316,6 +316,7 @@ Parameter | Description | Default
 `server.statefulSet.headless.labels` | labels for Prometheus server headless service | `{}`
 `server.statefulSet.headless.servicePort` | Prometheus server headless service port | `80`
 `server.resources` | Prometheus server resource requests and limits | `{}`
+`server.verticalAutoscaler.enabled` | If true a VPA object will be created for the controller (either StatefulSet or Deployemnt, based on above configs) | `false`
 `server.securityContext` | Custom [security context](https://kubernetes.io/docs/tasks/configure-pod-container/security-context/) for server containers | `{}`
 `server.service.annotations` | annotations for Prometheus server service | `{}`
 `server.service.clusterIP` | internal Prometheus server cluster service IP | `""`

stable/prometheus/templates/server-vpa.yaml

@@ -0,0 +1,24 @@
+{{- if .Values.server.enabled -}}
+{{- if .Values.server.verticalAutoscaler.enabled -}}
+apiVersion: autoscaling.k8s.io/v1beta2
+kind: VerticalPodAutoscaler
+metadata:
+  labels:
+    {{- include "prometheus.server.labels" . | nindent 4 }}
+  name: {{ template "prometheus.server.fullname" . }}-vpa
+spec:
+  targetRef:
+{{- if .Values.server.statefulSet.enabled }}
+    apiVersion: "apps/v1"
+    kind: StatefulSet
+{{- else }}
+    apiVersion: "extensions/v1beta1"
+    kind: Deployment
+{{- end }}
+    name: {{ template "prometheus.server.fullname" . }}
+  updatePolicy:
+    updateMode: {{ .Values.server.verticalAutoscaler.updateMode | default "Off" | quote }}
+  resourcePolicy:
+    containerPolicies: {{ .Values.server.verticalAutoscaler.containerPolicies | default list | toYaml | trim | nindent 4 }}
+{{- end -}} {{/* if .Values.server.verticalAutoscaler.enabled */}}
+{{- end -}} {{/* .Values.server.enabled */}}

stable/prometheus/values.yaml

@@ -881,6 +881,15 @@ server:
     #   cpu: 500m
     #   memory: 512Mi
 
+  ## Vertical Pod Autoscaler config
+  ## Ref: https://github.com/kubernetes/autoscaler/tree/master/vertical-pod-autoscaler
+  verticalAutoscaler:
+    ## If true a VPA object will be created for the controller (either StatefulSet or Deployemnt, based on above configs)
+    enabled: false
+    # updateMode: "Auto"
+    # containerPolicies:
+    # - containerName: 'prometheus-server'
+
   ## Security context to be added to server pods
   ##
   securityContext: