example-prometheus.yaml

## prometheus.yaml contains a tiny Prometheus deployment used for testing the
## Grafana Agent Operator.

---

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: prometheus
  namespace: default
  labels:
    app: prometheus
spec:
  serviceName: prometheus
  replicas: 1
  selector:
    matchLabels:
      app: prometheus
  template:
    metadata:
      labels:
        app: prometheus
    spec:
      containers:
      - name: prometheus
        image: prom/prometheus:v2.26.0
        args:
          - --config.file=/var/lib/prometheus/prometheus.yml
          - --enable-feature=remote-write-receiver
          - --storage.tsdb.path=/var/lib/data
        ports:
          - name: http-metrics
            containerPort: 9090
        volumeMounts:
          - mountPath: /var/lib/prometheus
            name: config
            readOnly: true
          - mountPath: /var/lib/data
            name: data
      volumes:
        - name: config
          configMap:
            name: prometheus-config
        - name: data
          emptyDir: {}

---

apiVersion: v1
kind: ConfigMap
metadata:
  name: prometheus-config
  namespace: default
  labels:
    app: prometheus
data:
  prometheus.yml: |
    # Nothing to do, Prometheus is just used for writing to

---

apiVersion: v1
kind: Service
metadata:
  name: prometheus
  namespace: default
  labels:
    app: prometheus
spec:
  selector:
    app: prometheus
  ports:
  - name: http-metrics
    port: 9090
    targetPort: 9090

---

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: prometheus
  namespace: default
  labels:
    app: prometheus
spec:
  rules:
  - host: prometheus.k3d.localhost
    http:
      paths:
        - path: /
          pathType: Prefix
          backend:
            service:
              name: prometheus
              port: { name: 'http-metrics' }