PEER-244,245: Add Question Service Deployment

Signed-off-by: SeeuSim <[email protected]>

Author: SeeuSim

backend/question/src/config.ts

@@ -11,3 +11,5 @@ export const dbConfig = {
   user: process.env.POSTGRES_USER,
   password: process.env.POSTGRES_PASSWORD,
 };
+
+export const LOAD_TEST_POD = process.env.LOAD_TEST_POD || 'http://user-service-load-test';

backend/question/src/server.ts

@@ -7,7 +7,7 @@ import helmet from 'helmet';
 import { StatusCodes } from 'http-status-codes';
 import pino from 'pino-http';
 
-import { UI_HOST } from '@/config';
+import { LOAD_TEST_POD, UI_HOST } from '@/config';
 import { config, db } from '@/lib/db';
 import { logger } from '@/lib/utils';
 import questionsRouter from '@/routes/question';
@@ -32,7 +32,7 @@ app.use(json());
 app.use(helmet());
 app.use(
   cors({
-    origin: [UI_HOST],
+    origin: [UI_HOST, LOAD_TEST_POD],
     credentials: true,
   })
 );

k8s/04-question-svc-deployment.yaml

@@ -0,0 +1,95 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: question-service
+  namespace: peerprep
+  labels:
+    project: peerprep
+    peerprep.service: question-service
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      project: peerprep
+      peerprep.service: question-service
+  strategy:
+    type: Recreate
+  template:
+    metadata:
+      labels:
+        project: peerprep
+        peerprep.service: question-service
+        peerprep.network.question-api: "true"
+        peerprep.network.question-db: "true"
+    spec:
+      initContainers:
+        - name: wait-for-postgres
+          image: postgres:16.4
+          env:
+            - name: PGHOST
+              valueFrom:
+                secretKeyRef:
+                  name: question-secret
+                  key: EXPRESS_DB_HOST
+            - name: PGPORT
+              valueFrom:
+                secretKeyRef:
+                  name: question-secret
+                  key: EXPRESS_DB_PORT
+            - name: PGPASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: question-secret
+                  key: POSTGRES_PASSWORD
+            - name: PGUSER
+              valueFrom:
+                secretKeyRef:
+                  name: question-secret
+                  key: POSTGRES_USER
+            - name: PGDATABASE
+              valueFrom:
+                secretKeyRef:
+                  name: question-secret
+                  key: POSTGRES_DB
+          command:
+            - /bin/sh
+            - -c
+            - |
+              while ! psql -c 'SELECT 1' > /dev/null 2>&1; do
+                echo "Waiting for $PGDATABASE"
+                sleep 1
+              done
+              echo "$PGDATABASE is ready!"
+      
+      containers:
+        - name: question-express
+          image: ay2425s1cs3219g16/question-express:main
+          # image: ay2425s1cs3219g16/question-express:sha-ff94455
+          imagePullPolicy: IfNotPresent
+          envFrom:
+          - secretRef: 
+              name: question-secret
+          env:
+            - name: LOAD_TEST_POD
+              value: http://question-service-load-test
+          livenessProbe:
+            exec:
+              command:
+                - /bin/sh
+                - -c
+                - wget --no-verbose --tries=1 --spider http://localhost:9002/health || exit 1
+            periodSeconds: 30
+            initialDelaySeconds: 5
+            timeoutSeconds: 10
+            failureThreshold: 5
+          ports:
+            - name: question-svc-ctr
+              containerPort: 9002
+          resources:
+            requests:
+              cpu: 250m
+              memory: 256Mi
+            limits:
+              cpu: 500m
+              memory: 512Mi
+                

k8s/04-question-svc-hpa.yaml

@@ -0,0 +1,19 @@
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: question-service-hpa
+  namespace: peerprep
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: question-service
+  minReplicas: 1
+  maxReplicas: 5
+  metrics:
+  - type: Resource
+    resource:
+      name: cpu
+      target:
+        type: Utilization
+        averageUtilization: 30

k8s/04-question-svc-service.yaml

@@ -0,0 +1,17 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: question-service
+  namespace: peerprep
+  labels:
+    project: peerprep
+    peerprep.service: question-service
+spec:
+  type: ClusterIP
+  selector:
+    project: peerprep
+    peerprep.service: question-service
+  ports:
+    - name: question-svc-prt
+      port: 9002
+      targetPort: question-svc-ctr

k8s/README.md

@@ -2,7 +2,8 @@
 
 ## Prerequisites
 
-- Minikube
+- [**Minikube**](https://minikube.sigs.k8s.io/docs/)
+
   To run a local Kubernetes cluster, we
   recommend using Minikube on your local machine.