myapi-kubernetes.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: myapi-config
data:
  application.properties: |-
    spring.jpa.hibernate.ddl-auto=update
    spring.jpa.show-sql=true
    spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
    kafka.bootstrap-servers=kafka-service:9092

---
apiVersion: v1
kind: Secret
metadata:
  name: myapi-secrets
type: Opaque
data:
  username: cG9zdGdyZXM=
  password: cG9zdGdyZXM=

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: zookeeper
spec:
  replicas: 2
  selector:
    matchLabels:
      app: zookeeper
  template:
    metadata:
      labels:
        app: zookeeper
    spec:
      containers:
        - name: zookeeper
          image: docker.io/bitnami/zookeeper:3.9
          ports:
            - containerPort: 2181
          volumeMounts:
            - name: zookeeper-data
              mountPath: /bitnami
          env:
            - name: ALLOW_ANONYMOUS_LOGIN
              value: "yes"
      volumes:
        - name: zookeeper-data
          emptyDir: {}

---
apiVersion: v1
kind: Service
metadata:
  name: zookeeper-service
spec:
  ports:
    - port: 2181
      targetPort: 2181
  selector:
    app: zookeeper

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: kafka
spec:
  replicas: 2
  selector:
    matchLabels:
      app: kafka
  template:
    metadata:
      labels:
        app: kafka
    spec:
      containers:
        - name: kafka
          image: docker.io/bitnami/kafka:3.4
          ports:
            - containerPort: 9092
          volumeMounts:
            - name: kafka-data
              mountPath: /bitnami
          env:
            - name: KAFKA_CFG_ZOOKEEPER_CONNECT
              value: zookeeper-service:2181
            - name: KAFKA_ADVERTISED_LISTENERS
              value: PLAINTEXT://kafka-service:9092
            - name: KAFKA_LISTENER_SECURITY_PROTOCOL_MAP
              value: PLAINTEXT:PLAINTEXT
            - name: KAFKA_INTER_BROKER_LISTENER_NAME
              value: PLAINTEXT
      volumes:
        - name: kafka-data
          emptyDir: {}

---
apiVersion: v1
kind: Service
metadata:
  name: kafka-service
spec:
  ports:
    - port: 9092
      targetPort: 9092
  selector:
    app: kafka

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: myapi-deployment
spec:
  replicas: 3
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1        # Defines the maximum number of pods that can be created over the desired number of pods.
      maxUnavailable: 1  # Defines the maximum number of pods that can be unavailable during the update.
  selector:
    matchLabels:
      app: myapi
  template:
    metadata:
      labels:
        app: myapi
    spec:
      containers:
        - name: myapi
          image: sherifs82/myapi:v1
          ports:
            - containerPort: 8080
          envFrom:
            - configMapRef:
                name: myapi-config
          env:
            - name: SPRING_DATASOURCE_URL
              value: jdbc:postgresql://db-service:5432/postgres
            - name: SPRING_DATASOURCE_USERNAME
              valueFrom:
                secretKeyRef:
                  name: myapi-secrets
                  key: username
            - name: SPRING_DATASOURCE_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: myapi-secrets
                  key: password

---
apiVersion: v1
kind: Service
metadata:
  name: myapi-service
spec:
  type: ClusterIP
  ports:
    - port: 8080
      targetPort: 8080
  selector:
    app: myapi
---
apiVersion: v1
kind: Service
metadata:
  name: myapi-service
spec:
  type: LoadBalancer
  ports:
    - port: 8080
      targetPort: 8080
  selector:
    app: myapi