apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: prometheus
  namespace: observability
  labels:
    app: prometheus
spec:
  serviceName: prometheus
  replicas: 1
  selector:
    matchLabels:
      app: prometheus
  template:
    metadata:
      labels:
        app: prometheus
      annotations:
        prometheus.io/scrape: "true"
        prometheus.io/port: "9090"
    spec:
      serviceAccountName: prometheus
      nodeSelector:
        kubernetes.io/hostname: hetzner-2
      containers:
        - name: prometheus
          image: prom/prometheus:v2.54.1
          args:
            - '--config.file=/etc/prometheus/prometheus.yml'
            - '--storage.tsdb.path=/prometheus'
            - '--storage.tsdb.retention.time=7d'
            - '--web.console.libraries=/usr/share/prometheus/console_libraries'
            - '--web.console.templates=/usr/share/prometheus/consoles'
            - '--web.enable-lifecycle'
            - '--web.enable-admin-api'
          ports:
            - name: http
              containerPort: 9090
              protocol: TCP
          livenessProbe:
            httpGet:
              path: /-/healthy
              port: http
            initialDelaySeconds: 30
            periodSeconds: 10
            timeoutSeconds: 5
          readinessProbe:
            httpGet:
              path: /-/ready
              port: http
            initialDelaySeconds: 30
            periodSeconds: 10
            timeoutSeconds: 5
          resources:
            requests:
              cpu: 500m
              memory: 2Gi
            limits:
              cpu: 2000m
              memory: 4Gi
          volumeMounts:
            - name: prometheus-config
              mountPath: /etc/prometheus
            - name: prometheus-data
              mountPath: /prometheus
      volumes:
        - name: prometheus-config
          configMap:
            name: prometheus-config
        - name: prometheus-data
          persistentVolumeClaim:
            claimName: prometheus-data

---
apiVersion: v1
kind: Service
metadata:
  name: prometheus
  namespace: observability
  labels:
    app: prometheus
spec:
  type: ClusterIP
  ports:
    - port: 9090
      targetPort: http
      protocol: TCP
      name: http
  selector:
    app: prometheus