distributed-document-management-system/infra/k8s/05-comments-service.yml at main · YXlh-64/distributed-document-management-system · GitHub

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# ============================================================
# 05-comments-service.yml  –  Comments Spring Boot service
# ============================================================
#
# CONCEPT: Service independence
# ──────────────────────────────
# This service (Comments) is completely independent of the Documents
# service:
#   • It uses its OWN Cassandra node: cassandra:9042
#   • It creates its own keyspace before the app starts.
#   • It does NOT know the Documents service exists.
#
# This is the "database-per-service" pattern in action.
# ============================================================

# ─── Deployment ──────────────────────────────────────────────────────
apiVersion: apps/v1
kind: Deployment
metadata:
  name: comments-service
  namespace: dms
  labels:
    app: comments-service
spec:
  replicas: 1
  selector:
    matchLabels:
      app: comments-service
  template:
    metadata:
      labels:
        app: comments-service
    spec:
      initContainers:
        - name: wait-for-cassandra
          image: busybox:1.36
          command:
            - sh
            - -c
            - |
              echo "Waiting for cassandra:9042..."
              until nc -z cassandra 9042; do
                sleep 2
              done
              echo "Cassandra is reachable!"
        - name: ensure-keyspace
          image: cassandra:4.1
          command:
            - sh
            - -c
            - |
              until cqlsh cassandra 9042 -e "CREATE KEYSPACE IF NOT EXISTS dms WITH replication = {'class':'SimpleStrategy','replication_factor':1};"; do
                echo "Waiting to create keyspace dms..."
                sleep 2
              done
              echo "Keyspace dms is ready."
      containers:
        - name: comments-service
          image: dms/comments-service:latest
          imagePullPolicy: Never
          ports:
            - containerPort: 8082
          env:
            - name: CASSANDRA_HOST
              value: "cassandra"
            - name: CASSANDRA_PORT
              value: "9042"
            - name: CASSANDRA_DC
              value: "datacenter1"
            - name: CASSANDRA_KEYSPACE
              value: "dms"
            - name: MANAGEMENT_ENDPOINT_HEALTH_PROBES_ENABLED
              value: "true"
          readinessProbe:
            httpGet:
              path: /actuator/health/readiness
              port: 8082
            initialDelaySeconds: 30
            periodSeconds: 10
            failureThreshold: 5
          livenessProbe:
            httpGet:
              path: /actuator/health/liveness
              port: 8082
            initialDelaySeconds: 60
            periodSeconds: 20

---
# ─── Service ─────────────────────────────────────────────────────────
apiVersion: v1
kind: Service
metadata:
  name: comments-service
  namespace: dms
  labels:
    app: comments-service
spec:
  type: ClusterIP
  selector:
    app: comments-service
  ports:
    - name: http
      port: 8082
      targetPort: 8082