deploy: replace ClickHouse with PostgreSQL/TimescaleDB + OpenSearch in K8s manifests

- Dockerfile: update default SPRING_DATASOURCE_URL to jdbc:postgresql, add OPENSEARCH_URL default env
- deploy/postgres.yaml: new TimescaleDB StatefulSet + headless Service (10Gi PVC, pg_isready probes)
- deploy/opensearch.yaml: new OpenSearch 2.19.0 StatefulSet + headless Service (10Gi PVC, single-node, security disabled)
- deploy/server.yaml: switch datasource env from clickhouse-credentials to postgres-credentials, add OPENSEARCH_URL

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Dockerfile

@@ -18,9 +18,10 @@ FROM eclipse-temurin:17-jre
 WORKDIR /app
 COPY --from=build /build/cameleer3-server-app/target/cameleer3-server-app-*.jar /app/server.jar
 
-ENV SPRING_DATASOURCE_URL=jdbc:ch://clickhouse:8123/cameleer3
+ENV SPRING_DATASOURCE_URL=jdbc:postgresql://postgres:5432/cameleer3
 ENV SPRING_DATASOURCE_USERNAME=cameleer
 ENV SPRING_DATASOURCE_PASSWORD=cameleer_dev
+ENV OPENSEARCH_URL=http://opensearch:9200
 
 EXPOSE 8081
 ENTRYPOINT exec java -jar /app/server.jar

deploy/opensearch.yaml

@@ -0,0 +1,84 @@
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: opensearch
+  namespace: cameleer
+spec:
+  serviceName: opensearch
+  replicas: 1
+  selector:
+    matchLabels:
+      app: opensearch
+  template:
+    metadata:
+      labels:
+        app: opensearch
+    spec:
+      containers:
+        - name: opensearch
+          image: opensearchproject/opensearch:2.19.0
+          ports:
+            - containerPort: 9200
+              name: http
+            - containerPort: 9300
+              name: transport
+          env:
+            - name: discovery.type
+              value: single-node
+            - name: DISABLE_SECURITY_PLUGIN
+              value: "true"
+          volumeMounts:
+            - name: data
+              mountPath: /usr/share/opensearch/data
+          resources:
+            requests:
+              memory: "1Gi"
+              cpu: "200m"
+            limits:
+              memory: "4Gi"
+              cpu: "1000m"
+          livenessProbe:
+            exec:
+              command:
+                - sh
+                - -c
+                - curl -s http://localhost:9200/_cluster/health
+            initialDelaySeconds: 30
+            periodSeconds: 10
+            timeoutSeconds: 5
+            failureThreshold: 3
+          readinessProbe:
+            exec:
+              command:
+                - sh
+                - -c
+                - curl -s http://localhost:9200/_cluster/health
+            initialDelaySeconds: 15
+            periodSeconds: 10
+            timeoutSeconds: 5
+            failureThreshold: 3
+  volumeClaimTemplates:
+    - metadata:
+        name: data
+      spec:
+        accessModes: ["ReadWriteOnce"]
+        resources:
+          requests:
+            storage: 10Gi
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: opensearch
+  namespace: cameleer
+spec:
+  clusterIP: None
+  selector:
+    app: opensearch
+  ports:
+    - port: 9200
+      targetPort: 9200
+      name: http
+    - port: 9300
+      targetPort: 9300
+      name: transport

deploy/postgres.yaml

@@ -0,0 +1,91 @@
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: postgres
+  namespace: cameleer
+spec:
+  serviceName: postgres
+  replicas: 1
+  selector:
+    matchLabels:
+      app: postgres
+  template:
+    metadata:
+      labels:
+        app: postgres
+    spec:
+      containers:
+        - name: postgres
+          image: timescale/timescaledb:latest-pg16
+          ports:
+            - containerPort: 5432
+              name: postgres
+          env:
+            - name: POSTGRES_DB
+              value: cameleer3
+            - name: POSTGRES_USER
+              valueFrom:
+                secretKeyRef:
+                  name: postgres-credentials
+                  key: POSTGRES_USER
+            - name: POSTGRES_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: postgres-credentials
+                  key: POSTGRES_PASSWORD
+          volumeMounts:
+            - name: data
+              mountPath: /var/lib/postgresql/data
+          resources:
+            requests:
+              memory: "1Gi"
+              cpu: "200m"
+            limits:
+              memory: "4Gi"
+              cpu: "1000m"
+          livenessProbe:
+            exec:
+              command:
+                - pg_isready
+                - -U
+                - cameleer
+                - -d
+                - cameleer3
+            initialDelaySeconds: 15
+            periodSeconds: 10
+            timeoutSeconds: 3
+            failureThreshold: 3
+          readinessProbe:
+            exec:
+              command:
+                - pg_isready
+                - -U
+                - cameleer
+                - -d
+                - cameleer3
+            initialDelaySeconds: 5
+            periodSeconds: 5
+            timeoutSeconds: 3
+            failureThreshold: 3
+  volumeClaimTemplates:
+    - metadata:
+        name: data
+      spec:
+        accessModes: ["ReadWriteOnce"]
+        resources:
+          requests:
+            storage: 10Gi
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: postgres
+  namespace: cameleer
+spec:
+  clusterIP: None
+  selector:
+    app: postgres
+  ports:
+    - port: 5432
+      targetPort: 5432
+      name: postgres

deploy/server.yaml

@@ -22,17 +22,19 @@ spec:
             - containerPort: 8081
           env:
             - name: SPRING_DATASOURCE_URL
-              value: "jdbc:ch://clickhouse:8123/cameleer3"
+              value: "jdbc:postgresql://postgres:5432/cameleer3"
             - name: SPRING_DATASOURCE_USERNAME
               valueFrom:
                 secretKeyRef:
-                  name: clickhouse-credentials
+                  name: postgres-credentials
-                  key: CLICKHOUSE_USER
+                  key: POSTGRES_USER
             - name: SPRING_DATASOURCE_PASSWORD
               valueFrom:
                 secretKeyRef:
-                  name: clickhouse-credentials
+                  name: postgres-credentials
-                  key: CLICKHOUSE_PASSWORD
+                  key: POSTGRES_PASSWORD
+            - name: OPENSEARCH_URL
+              value: "http://opensearch:9200"
             - name: CAMELEER_AUTH_TOKEN
               valueFrom:
                 secretKeyRef: