atombender/prometheus-k8s

This runs Prometheus using a special controller that monitors a configmap and automatically reloads Prometheus whenever the configmap changes.

Example pod

yaml
apiVersion: v1
kind: Pod
metadata:
  name: prometheus
  labels:
    app: prometheus
spec:
  containers:
  - name: prometheus
    image: atombender/prometheus-k8s:v1.0-latest
    imagePullPolicy: Always
    ports:
    - containerPort: 9090
      protocol: TCP
    livenessProbe:
      httpGet:
        path: /metrics
        port: 9090
        scheme: HTTP
      initialDelaySeconds: 60
      timeoutSeconds: 5
      successThreshold: 1
      failureThreshold: 5
    volumeMounts:
    - name: configs
      mountPath: /mnt/prometheus-config
    - name: data
      mountPath: /mnt/prometheus-data
    env:
    - name: PROMETHEUS_K8S_CONFIGROOT
      value: /mnt/prometheus-config
    - name: PROMETHEUS_K8S_DATADIR
      value: /mnt/prometheus-data
    - name: PROMETHEUS_K8S_ARGS
      value: "-alertmanager.url=http://alertmanager/"
  volumes:
  - name: configs
    configMap:
      name: prometheus
  - name: data
    emptyDir:

Configuration

• PROMETHEUS_K8S_CONFIGROOT — sets the folder in which configuration files are written. Defaults to /config. Must contain prometheus.yml.
• PROMETHEUS_K8S_CONFIGMAP — sets the name of the configmap to watch, using the format [ns]/[name]. Defaults to default/prometheus.
• PROMETHEUS_K8S_DATADIR — Prometheus data directory. Defaults to /var/prometheus.
• PROMETHEUS_K8S_ARGS — additional arguments to pass to Prometheus, e.g. -alertmanager.url.

Release version numbers

Prometheus version number is prefixed: v1.0-latest is Prometheus 1.0.