apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: nats-pvc
  namespace: databases
spec:
  accessModes:
    - ReadWriteOnce
  storageClassName: longhorn
  resources:
    requests:
      storage: 10Gi
    limits:
      storage: 10Gi
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: nats-configmap
  namespace: databases
data:
  server.conf: |
    port: 4222
    monitor_port: 8222
    jetstream {
      store_dir: nats
      # 1GB
      max_memory_store: 1073741824
      # 10GB
      max_file_store: 10737418240
    }
    authorization: {
        users: [
            {user: $SYS, password: $NATS_PASSWORD},
            {user: default, password: $NATS_PASSWORD}
        ]
    }
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nats
  namespace: databases
spec:
  replicas: 1
  strategy:
    type: Recreate
  selector:
    matchLabels:
      ms: nats
  template:
    metadata:
      labels:
        ms: nats
    spec:
      terminationGracePeriodSeconds: 120
      containers:
        - name: nats
          image: nats:2.10.5
          ports:
            - containerPort: 4222
            - containerPort: 8222
          volumeMounts:
            - name: data
              mountPath: /data
          env:
            - name: NATS_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: secrets
                  key: NATS_PASSWORD
      volumes:
        - name: data
          persistentVolumeClaim:
            claimName: nats-pvc
        - name: config
          configMap:
            name: nats-configmap
---
apiVersion: v1
kind: Service
metadata:
  name: nats
  namespace: databases
spec:
  type: NodePort
  selector:
    ms: nats
  ports:
    - port: 4222
      name: server
      targetPort: 4222
    - port: 8222
      name: monitor
      targetPort: 8222
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nats-exporter
  namespace: databases
spec:
  replicas: 1
  selector:
    matchLabels:
      ms: nats-exporter
  template:
    metadata:
      labels:
        ms: nats-exporter
      annotations:
        prometheus.io/scrape: "true"
        prometheus.io/port: "7777"
    spec:
      containers:
        - name: nats-exporter
          image: natsio/prometheus-nats-exporter
          args:
            - -channelz
            - -connz
            - -connz_detailed
            - -healthz
            - -jsz=all
            - -serverz
            - -subz
            - -varz
            - http://nats.databases:8222
          ports:
            - containerPort: 7777