apiVersion: apps/v1
kind: Deployment
metadata:
  name: prometheus
  namespace: observability
  labels:
    app.kubernetes.io/name: prometheus
    app.kubernetes.io/component: metrics
    app.kubernetes.io/part-of: observability
spec:
  replicas: 1
  strategy:
    # ReadWriteOnce PVC: the old pod must release the volume first.
    type: Recreate
  selector:
    matchLabels:
      app: prometheus
  template:
    metadata:
      labels:
        app: prometheus
        app.kubernetes.io/name: prometheus
        app.kubernetes.io/component: metrics
        app.kubernetes.io/part-of: observability
      annotations:
        prometheus.io/scrape: "true"
        prometheus.io/port: "9090"
    spec:
      serviceAccountName: prometheus
      securityContext:
        runAsUser: 65534
        runAsGroup: 65534
        fsGroup: 65534
      containers:
        - name: prometheus
          image: prom/prometheus:v3.14.0
          args:
            - --config.file=/etc/prometheus/prometheus.yaml
            - --storage.tsdb.path=/prometheus
            - --storage.tsdb.retention.time=15d
            - --storage.tsdb.retention.size=8GB
            - --web.enable-lifecycle
            # Receives remote_write from Tempo's metrics_generator (span metrics + service graphs).
            - --web.enable-remote-write-receiver
            - --web.external-url=https://prometheus.sttlab.local
            - --web.route-prefix=/
          ports:
            - name: http
              containerPort: 9090
          resources:
            requests:
              cpu: 100m
              memory: 512Mi
            limits:
              cpu: "2"
              memory: 2Gi
          readinessProbe:
            httpGet:
              path: /-/ready
              port: http
            initialDelaySeconds: 10
            periodSeconds: 10
          livenessProbe:
            httpGet:
              path: /-/healthy
              port: http
            initialDelaySeconds: 30
            periodSeconds: 30
          volumeMounts:
            - name: config
              mountPath: /etc/prometheus
            - name: data
              mountPath: /prometheus
            - name: librechat-metrics
              mountPath: /etc/prometheus/secrets/librechat
              readOnly: true
      volumes:
        - name: config
          configMap:
            name: prometheus-config
        - name: librechat-metrics
          secret:
            secretName: librechat-metrics
        - name: data
          persistentVolumeClaim:
            claimName: prometheus-data