app.yaml

---
apiVersion: kapp.k14s.io/v1alpha1
kind: Config
waitRules:
- supportsObservedGeneration: true
  conditionMatchers:
  - type: Ready
    status: "False"
    failure: true
  - type: Ready
    status: "True"
    success: true
  resourceMatchers:
  - apiVersionKindMatcher: {apiVersion: servicebinding.io/v1alpha3, kind: ServiceBinding}
- supportsObservedGeneration: true
  conditionMatchers:
  - type: Ready
    status: "False"
    failure: true
  - type: Ready
    status: "True"
    success: true
  resourceMatchers:
  - apiVersionKindMatcher: {apiVersion: serving.knative.dev/v1, kind: Service}


---
apiVersion: servicebinding.io/v1alpha3
kind: ServiceBinding
metadata:
  annotations:
    kapp.k14s.io/change-rule: "upsert before upserting example.com/workload"
  name: spring-petclinic-db
spec:
  # direct Secret reference is used for compatibility, but not recommended for dynamically provisioned services
  service:
    apiVersion: v1
    kind: Secret
    name: spring-petclinic-db
  workload:
    apiVersion: serving.knative.dev/v1
    kind: Service
    name: spring-petclinic

---
apiVersion: serving.knative.dev/v1
kind: Service
metadata:
  name: spring-petclinic
  annotations:
    kapp.k14s.io/change-group: example.com/workload
  labels:
    app: spring-petclinic
spec:
  template:
    metadata:
      labels:
        app: spring-petclinic
    spec:
      containers:
        - name: workload
          # built with paketo builder from https://github.com/spring-projects/spring-petclinic
          image: scothis/petclinic:service-bindings-20200922
          env:
          # tell the workload to use mysql instead of the default embedded database
          - name: SPRING_PROFILES_ACTIVE
            value: mysql
          ports:
          - containerPort: 8080
          livenessProbe:
            httpGet:
              path: /actuator/health/liveness
              port: 8080
          readinessProbe:
            httpGet:
              path: /actuator/health/readiness
              port: 8080

mysql.yaml

# NOT PRODUCTION QUALITY

---
apiVersion: v1
kind: Secret
metadata:
  name: spring-petclinic-db
type: servicebinding.io/mysql
stringData:
  type: mysql
  provider: mariadb
  host: spring-petclinic-db
  port: "3306"
  database: default
  # demo credentials
  username: user
  password: pass

---
apiVersion: v1
kind: Service
metadata:
  name: spring-petclinic-db
spec:
  ports:
  - port: 3306
  selector:
    app: spring-petclinic-db

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: spring-petclinic-db
  labels:
    app: spring-petclinic-db
spec:
  selector:
    matchLabels:
      app: spring-petclinic-db
  template:
    metadata:
      labels:
        app: spring-petclinic-db
    spec:
      # no persistance configured, the database will be reset when the pod terminates
      containers:
      - image: mariadb:10.5
        name: mysql
        env:
        - name: MYSQL_USER
          valueFrom:
            secretKeyRef:
              name: spring-petclinic-db
              key: username
        - name: MYSQL_PASSWORD
          valueFrom:
            secretKeyRef:
              name: spring-petclinic-db
              key: password
        - name: MYSQL_DATABASE
          valueFrom:
            secretKeyRef:
              name: spring-petclinic-db
              key: database
        - name: MYSQL_ROOT_PASSWORD
          value: root
        ports:
        - containerPort: 3306
          name: mysql
        livenessProbe:
          tcpSocket:
            port: mysql
        readinessProbe:
          tcpSocket:
            port: mysql
        startupProbe:
          tcpSocket:
            port: mysql