[bitnami/nginx] Horizontal Pod Autoscaler (#2593)

* Added hpa

* typo corrected

* [bitnami/nginx] Update components versions

Signed-off-by: Bitnami Containers <containers@bitnami.com>

Co-authored-by: Shankar Mohan <Shankar.Mohan@mrisoftware.com>
Co-authored-by: Bitnami Containers <containers@bitnami.com>

bitnami/nginx/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: nginx
-version: 5.3.1
+version: 5.4.0
 appVersion: 1.17.10
 description: Chart for the nginx server
 keywords:

bitnami/nginx/README.md

@@ -125,6 +125,11 @@ The following tables lists the configurable parameters of the NGINX Open Source
 | `metrics.serviceMonitor.interval`          | Interval at which metrics should be scraped.                                                | `nil` (Prometheus Operator default value)                    |
 | `metrics.serviceMonitor.scrapeTimeout`     | Timeout after which the scrape is ended                                                     | `nil` (Prometheus Operator default value)                    |
 | `metrics.serviceMonitor.selector`          | Prometheus instance selector labels                                                         | `nil`                                                        |
+| `autoscaling.enabled`                      | Enable autoscaling for NGINX deployment                                                     | `false`                                                      |
+| `autoscaling.minReplicas`                  | Minimum number of replicas to scale back                                                    | `nil`                                                        |
+| `autoscaling.maxReplicas`                  | Maximum number of replicas to scale out                                                     | `nil`                                                        |
+| `autoscaling.targetCPU`                    | Target CPU utilization percentage                                                           | `nil`                                                        |
+| `autoscaling.targetMemory`                 | Target Memory utilization percentage                                                        | `nil`                                                        |
 
 Specify each parameter using the `--set key=value[,key=value]` argument to `helm install`. For example,
 

bitnami/nginx/templates/hpa.yaml

@@ -0,0 +1,27 @@
+{{- if .Values.autoscaling.enabled }}
+apiVersion: autoscaling/v2beta1
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ template "nginx.fullname" . }}
+  labels: {{- include "nginx.labels" . | nindent 4 }}
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: {{ template "nginx.fullname" . }}
+  minReplicas: {{ .Values.autoscaling.minReplicas }}
+  maxReplicas: {{ .Values.autoscaling.maxReplicas }}
+  metrics:
+    {{- if .Values.autoscaling.targetCPU }}
+    - type: Resource
+      resource:
+        name: cpu
+        targetAverageUtilization: {{ .Values.autoscaling.targetCPU }}
+    {{- end }}
+    {{- if .Values.autoscaling.targetMemory }}
+    - type: Resource
+      resource:
+        name: memory
+        targetAverageUtilization: {{ .Values.autoscaling.targetMemory  }}
+    {{- end }}
+{{- end }}

bitnami/nginx/values.yaml

@@ -13,7 +13,7 @@
 image:
   registry: docker.io
   repository: bitnami/nginx
-  tag: 1.17.10-debian-10-r33
+  tag: 1.17.10-debian-10-r40
   ## Specify a imagePullPolicy
   ## Defaults to 'Always' if image tag is 'latest', else set to 'IfNotPresent'
   ## ref: http://kubernetes.io/docs/user-guide/images/#pre-pulling-images
@@ -54,7 +54,7 @@ cloneStaticSiteFromGit:
   image:
     registry: docker.io
     repository: bitnami/git
-    tag: 2.26.2-debian-10-r1
+    tag: 2.26.2-debian-10-r26
     ## Specify a imagePullPolicy
     ## Defaults to 'Always' if image tag is 'latest', else set to 'IfNotPresent'
     ## ref: http://kubernetes.io/docs/user-guide/images/#pre-pulling-images
@@ -298,7 +298,7 @@ metrics:
   image:
     registry: docker.io
     repository: bitnami/nginx-exporter
-    tag: 0.7.0-debian-10-r21
+    tag: 0.7.0-debian-10-r28
     pullPolicy: IfNotPresent
     ## Optionally specify an array of imagePullSecrets.
     ## Secrets must be manually created in the namespace.
@@ -364,3 +364,12 @@ metrics:
     ##
     # selector:
     #   prometheus: my-prometheus
+
+## Autoscaling parameters
+##
+autoscaling:
+  enabled: false
+  # minReplicas: 1
+  # maxReplicas: 10
+  # targetCPU: 50
+  # targetMemory: 50