Added Kustomize resources: HorizontalPodAutoscaler for deployment wor…

…kloads.

README.md

@@ -4,12 +4,18 @@ MapProxy service application
 Basic MapProxy service used internally by the Department of Biodiversity,
 Conservation and Attractions.
 
+# Docker image
+
+To build a new Docker image from the `Dockerfile`:
+
+    docker image build -t ghcr.io/dbca-wa/mapproxy .
+
 # Running Docker container
 
-When running this image as a container or workload, remember to provide a
-configuration file at `/app/config/mapproxy.yaml` (this can be a bind-mounted
-local file or a configmap in Kubernetes).
+When running this image as a container, provide a configuration file
+mounted at `/app/config/mapproxy.yaml` (this can be a bind-mounted
+local file or a ConfigMap in Kubernetes).
 
-Example:
+Example using a local bind-mount file:
 
     docker container run -p 8080:8080 -v $PWD/mapproxy.yaml:/app/config/mapproxy.yaml ghcr.io/dbca-wa/mapproxy

kustomize/base/deployment.yaml

@@ -3,7 +3,6 @@ kind: Deployment
 metadata:
   name: mapproxy-deployment
 spec:
-  replicas: 2
   strategy:
     type: RollingUpdate
   template:

kustomize/base/deployment_hpa.yaml

@@ -0,0 +1,17 @@
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: mapproxy-deployment-hpa
+spec:
+  minReplicas: 1
+  maxReplicas: 3
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+  metrics:
+    - resource:
+        name: cpu
+        target:
+          type: Utilization
+          averageUtilization: 250
+      type: Resource

kustomize/base/kustomization.yaml

@@ -2,5 +2,6 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 resources:
   - deployment.yaml
+  - deployment_hpa.yaml
   - pvc.yaml
   - service.yaml

kustomize/overlays/prod/deployment_hpa_patch.yaml

@@ -0,0 +1,7 @@
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: mapproxy-deployment-hpa
+spec:
+  scaleTargetRef:
+    name: mapproxy-deployment-prod

kustomize/overlays/prod/kustomization.yaml

@@ -15,6 +15,7 @@ labels:
       variant: prod
 patches:
   - path: deployment_patch.yaml
+  - path: deployment_hpa_patch.yaml
   - path: service_patch.yaml
 images:
   - name: ghcr.io/dbca-wa/mapproxy

kustomize/overlays/uat/deployment_hpa_patch.yaml

@@ -0,0 +1,7 @@
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: mapproxy-deployment-hpa
+spec:
+  scaleTargetRef:
+    name: mapproxy-deployment-uat

kustomize/overlays/uat/kustomization.yaml

@@ -11,6 +11,7 @@ labels:
       variant: uat
 patches:
   - path: deployment_patch.yaml
+  - path: deployment_hpa_patch.yaml
   - path: service_patch.yaml
 configMapGenerator:
   - name: mapproxy-configmap