Compute resources and HPA configuration

code/kubernetes/grpc-gateway/deployment.yaml

@@ -18,6 +18,13 @@ spec:
         imagePullPolicy: Always
         ports:
         - containerPort: 8080
+        resources:
+          requests:
+            cpu: 40m
+            memory: 80Mi
+          limits:
+            cpu: 120m
+            memory: 240Mi
         env:
         - name: GRPC_GATEWAY_PORT
           valueFrom:
@@ -76,5 +83,24 @@ spec:
           httpGet:
             path: /health
             port: 8080
-          initialDelaySeconds: 10
+          initialDelaySeconds: 30
           timeoutSeconds: 5
+---
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: grpc-gateway-hpa
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: grpc-gateway
+  minReplicas: 1
+  maxReplicas: 3
+  metrics:
+    - type: Resource
+      resource:
+        name: cpu
+        target:
+          type: Utilization
+          averageUtilization: 80

code/kubernetes/mongo/deployment.yaml

@@ -17,6 +17,13 @@ spec:
           image: mongo:latest
           ports:
             - containerPort: 27017
+          resources:
+            requests:
+              cpu: 200m
+              memory: 700Mi
+            limits:
+              cpu: 500m
+              memory: 1Gi
           env:
             - name: MONGO_INITDB_DATABASE
               valueFrom:
@@ -42,15 +49,15 @@ spec:
                 - mongosh
                 - --eval
                 - "db.adminCommand('ping')"
-            initialDelaySeconds: 15
+            initialDelaySeconds: 60
             timeoutSeconds: 5
           readinessProbe:
             exec:
               command:
                 - mongosh
                 - --eval
                 - "db.adminCommand('ping')"
-            initialDelaySeconds: 15
+            initialDelaySeconds: 20
             timeoutSeconds: 5
       volumes:
         - name: mongodb-data

code/kubernetes/scripts/README.md

@@ -45,6 +45,7 @@ $ ./cluster-info.sh
 - `--deployments` Shows deployment configurations and statuses for the namespace.
 - `--resources-pods` Displays real-time CPU and memory usage metrics for each pod.
 - `--resources-nodes` Displays real-time CPU and memory usage metrics for each node in the cluster.
+- `--hpa` Shows all Horizontal Pod Autoscalers in the namespace, including current and target scaling metrics.
 - `--all` Runs all of the above commands to display full cluster info.
 
 ### 4. Delete Cluster

code/kubernetes/scripts/cluster-info.sh

@@ -11,6 +11,7 @@ SHOW_SERVICES=false
 SHOW_DEPLOYMENTS=false
 SHOW_RESOURCES_PODS=false
 SHOW_RESOURCES_NODES=false
+SHOW_HPA=false
 
 if [[ $# -eq 0 ]]; then
   SHOW_NAMESPACES=true
@@ -19,6 +20,7 @@ if [[ $# -eq 0 ]]; then
   SHOW_DEPLOYMENTS=true
   SHOW_RESOURCES_PODS=true
   SHOW_RESOURCES_NODES=true
+  SHOW_HPA=true
 fi
 
 # Parse flags
@@ -30,13 +32,15 @@ while [[ "$#" -gt 0 ]]; do
     --deployments) SHOW_DEPLOYMENTS=true ;;
     --resources-pods) SHOW_RESOURCES_PODS=true ;;
     --resources-nodes) SHOW_RESOURCES_NODES=true ;;
+    --hpa) SHOW_HPA=true ;;
     --all)
       SHOW_NAMESPACES=true
       SHOW_PODS=true
       SHOW_SERVICES=true
       SHOW_DEPLOYMENTS=true
       SHOW_RESOURCES_PODS=true
       SHOW_RESOURCES_NODES=true
+      SHOW_HPA=true
       ;;
     *) echo "❌ Unknown flag: $1"; exit 1 ;;
   esac
@@ -53,3 +57,4 @@ $SHOW_SERVICES && echo -e "\n🔁 Services:" && kubectl get svc -n $CLUSTER_NAME
 $SHOW_DEPLOYMENTS && echo -e "\n📂 Deployments:" && kubectl get deployments -n $CLUSTER_NAME
 $SHOW_RESOURCES_PODS && echo -e "\n📊 Resource Usage (Pods):" && kubectl top pods -n $CLUSTER_NAME
 $SHOW_RESOURCES_NODES && echo -e "\n🖥️ Resource Usage (Nodes):" && kubectl top nodes
+$SHOW_HPA && echo -e "\n📌 Horizontal Pod Autoscalers:" && kubectl get hpa -n $CLUSTER_NAME

code/kubernetes/scripts/create-cluster.sh

@@ -3,20 +3,20 @@ set -e
 
 PROJECT_ID="threadit-api"
 CLUSTER_NAME="threadit-cluster"
-MACHINE_TYPE="e2-standard-4"
+MACHINE_TYPE="e2-standard-2"
 ZONE="europe-west1-b"
 
 gcloud config set project $PROJECT_ID
 
 gcloud container clusters create $CLUSTER_NAME \
   --num-nodes=3 \
   --enable-autoscaling \
-  --min-nodes=0 \
-  --max-nodes=4 \
+  --min-nodes=1 \
+  --max-nodes=5 \
   --machine-type=$MACHINE_TYPE \
   --zone=$ZONE \
   --disk-type=pd-standard \
-  --disk-size=20
+  --disk-size=25
 
 gcloud container clusters get-credentials $CLUSTER_NAME --zone=$ZONE
 

code/kubernetes/services/comment-service/deployment.yaml

@@ -18,6 +18,13 @@ spec:
           imagePullPolicy: Always
           ports:
             - containerPort: 50054
+          resources:
+            requests:
+              cpu: 20m
+              memory: 40Mi
+            limits:
+              cpu: 60m
+              memory: 120Mi
           env:
             - name: SERVICE_PORT
               valueFrom:
@@ -41,10 +48,29 @@ spec:
           readinessProbe:
             tcpSocket:
               port: 50054
-            initialDelaySeconds: 6
-            timeoutSeconds: 4
+            initialDelaySeconds: 5
+            timeoutSeconds: 3
           livenessProbe:
             tcpSocket:
               port: 50054
-            initialDelaySeconds: 6
-            timeoutSeconds: 4
+            initialDelaySeconds: 15
+            timeoutSeconds: 3
+---
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: comment-service-hpa
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: comment-service
+  minReplicas: 1
+  maxReplicas: 3
+  metrics:
+    - type: Resource
+      resource:
+        name: cpu
+        target:
+          type: Utilization
+          averageUtilization: 80

code/kubernetes/services/community-service/deployment.yaml

@@ -18,6 +18,13 @@ spec:
           imagePullPolicy: Always
           ports:
             - containerPort: 50052
+          resources:
+            requests:
+              cpu: 20m
+              memory: 40Mi
+            limits:
+              cpu: 60m
+              memory: 120Mi
           env:
             - name: SERVICE_PORT
               valueFrom:
@@ -41,10 +48,29 @@ spec:
           readinessProbe:
             tcpSocket:
               port: 50052
-            initialDelaySeconds: 6
-            timeoutSeconds: 4
+            initialDelaySeconds: 5
+            timeoutSeconds: 3
           livenessProbe:
             tcpSocket:
               port: 50052
-            initialDelaySeconds: 6
-            timeoutSeconds: 4
+            initialDelaySeconds: 15
+            timeoutSeconds: 3
+---
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: community-service-hpa
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: community-service
+  minReplicas: 1
+  maxReplicas: 3
+  metrics:
+    - type: Resource
+      resource:
+        name: cpu
+        target:
+          type: Utilization
+          averageUtilization: 80

code/kubernetes/services/db-service/deployment.yaml

@@ -18,6 +18,13 @@ spec:
           imagePullPolicy: Always
           ports:
             - containerPort: 50051
+          resources:
+            requests:
+              cpu: 100m
+              memory: 250Mi
+            limits:
+              cpu: 300m
+              memory: 2Gi
           env:
             - name: SERVICE_PORT
               valueFrom:
@@ -35,20 +42,44 @@ spec:
             - mountPath: /var/secret/gcp/
               name: bucket-credentials
               readOnly: true
+          livenessProbe:
+            tcpSocket:
+              port: 50051
+            initialDelaySeconds: 60
+            timeoutSeconds: 4
           readinessProbe:
             tcpSocket:
               port: 50051
-            initialDelaySeconds: 8
-            timeoutSeconds: 5
-          livenessProbe:
+            initialDelaySeconds: 30
+            timeoutSeconds: 4
+          startupProbe:
             tcpSocket:
               port: 50051
-            initialDelaySeconds: 8
-            timeoutSeconds: 5
+            periodSeconds: 2
+            failureThreshold: 90
       volumes:
         - name: bucket-credentials
           secret:
             secretName: bucket-secret
             items:
               - key: gcs-key.json
                 path: gcs-key.json
+---
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: db-service-hpa
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: db-service
+  minReplicas: 1
+  maxReplicas: 3
+  metrics:
+    - type: Resource
+      resource:
+        name: cpu
+        target:
+          type: Utilization
+          averageUtilization: 80

code/kubernetes/services/popular-service/deployment.yaml

@@ -18,6 +18,13 @@ spec:
           imagePullPolicy: Always
           ports:
             - containerPort: 50057
+          resources:
+            requests:
+              cpu: 20m
+              memory: 40Mi
+            limits:
+              cpu: 60m
+              memory: 120Mi
           env:
             - name: SERVICE_PORT
               valueFrom:
@@ -41,10 +48,29 @@ spec:
           readinessProbe:
             tcpSocket:
               port: 50057
-            initialDelaySeconds: 6
-            timeoutSeconds: 4
+            initialDelaySeconds: 5
+            timeoutSeconds: 3
           livenessProbe:
             tcpSocket:
               port: 50057
-            initialDelaySeconds: 6
-            timeoutSeconds: 4
+            initialDelaySeconds: 15
+            timeoutSeconds: 3
+---
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: popular-service-hpa
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: popular-service
+  minReplicas: 1
+  maxReplicas: 3
+  metrics:
+    - type: Resource
+      resource:
+        name: cpu
+        target:
+          type: Utilization
+          averageUtilization: 80