Storage Monitoring

The Management Pack for Kubernetes provides visibility to the storage metrics at the Node level and the Cluster level. This is now extended at the Namespace level and to differentiate them based on the PersistentVolumeClaim, mapping has been provided for Prometheus.

Source of the storage metrics is the kubelet, that needs to be configured as a target in Prometheus.

Metrics for Storage that are instanced on the PersistentVolumeClaim.

• Volume Available(Bytes)
• Volume Capacity(Bytes)
• Total Inodes
• Inodes Free
• Inodes Used

Prometheus Config YAML for kubelet

- job_name: kubernetes-kubelet
  honor_timestamps: true
  scrape_interval: 20s
  scrape_timeout: 10s
  metrics_path: /metrics
  scheme: https
  authorization:
    type: Bearer
    credentials_file: /var/run/secrets/kubernetes.io/serviceaccount/token
  tls_config:
    ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
    insecure_skip_verify: true
  follow_redirects: true
  relabel_configs:
    - separator: ;
      regex: __meta_kubernetes_node_label_(.+)
      replacement: $1
      action: labelmap
    - separator: ;
      regex: (.*)
      target_label: __address__
      replacement: kubernetes.default.svc:443
      action: replace
    - source_labels: [__meta_kubernetes_node_name]
      separator: ;
      regex: (.+)
      target_label: __metrics_path__
      replacement: /api/v1/nodes/${1}/proxy/metrics
      action: replace
  kubernetes_sd_configs:
    - role: node
      follow_redirects: true