Red Hat Summit Red Hat SummitApoyoConsolaDesarrolladoresIniciar una pruebaContacto

Este contenido no está disponible en el idioma seleccionado.

Chapter 10. Enabling Volume Metrics

To enable volume metrics for glusterfs plugin in order to collect the statistics of GlusterFS PVs, set up Prometheus, a monitoring toolkit. You can use Prometheus to visualize metrics and alerts for OpenShift Container Platform system resources.
For more information on how to setup Prometheus, see https://access.redhat.com/documentation/en-us/openshift_container_platform/3.10/html-single/configuring_clusters/#openshift-prometheus

10.1. Enabling Volume Metrics for File Storage and Block Storage
Copiar enlace

Following is the list of different metrics of the PVs that can be viewed on Prometheus:
  • kubelet_volume_stats_available_bytes: Number of available bytes in the volume.
  • kubelet_volume_stats_capacity_bytes: Capacity in bytes of the volume.
  • kubelet_volume_stats_inodes: Maximum number of inodes in the volume.
  • kubelet_volume_stats_inodes_free: Number of free inodes in the volume.
  • kubelet_volume_stats_inodes_used: Number of used inodes in the volume.
  • kubelet_volume_stats_used_bytes: Number of used bytes in the volume.
  • heketi_cluster_count: Number of clusters.
  • heketi_device_brick_count: Number of bricks on device.
  • heketi_device_count: Number of devices on host.
  • heketi_device_free: Amount of free space available on the device.
  • heketi_device_size: Total size of the device.
  • heketi_device_used: Amount of space used on the device.
  • heketi_nodes_count: Number of nodes on the cluster.
  • heketi_up: Verifies if heketi is running.
  • heketi_volumes_count: Number of volumes on cluster.
Viewing Metrics

To view any metrics:

  1. Add the metrics name in Prometheus, and click Execute.
  2. In the Graph tab, the value for the metrics for the volume is displayed as a graph.
    For example, in the following image, to check the available bytes, kubelet_volume_stats_available_bytes metric is added to the search bar on Prometheus. On clicking Execute, the available bytes value is depicted as a graph. You can hover the mouse on the line to get more details. (To view the image in detail, right-click and select View Image.)
    Viewing Metrics
    View larger image
    Viewing Metrics
Viewing Heketi Metrics

To view Heketi metrics on Prometheus, execute the following commands:

  1. Add annotations to the heketi-storage. 
    # oc annotate svc heketi-storage prometheus.io/scheme=http
# oc annotate svc heketi-storage prometheus.io/scrape=true
    Copy to Clipboard Toggle word wrap 
                # oc describe svc heketi-storage
            Name:          	heketi-storage
            Namespace:     	app-storage
            Labels:        	glusterfs=heketi-storage-service
               	            heketi=storage-service
            Annotations:   	description=Exposes Heketi service
               	            prometheus.io/scheme=http
               	             prometheus.io/scrape=true
            Selector:      	glusterfs=heketi-storage-pod
            Type:          	ClusterIP
            IP:            	172.30.90.87
            Port:          	heketi  8080/TCP
            TargetPort:    	8080/TCP
            Endpoints:     	172.18.14.2:8080
            Session Affinity:  None
    Copy to Clipboard Toggle word wrap
  2. Add the app-storage namespace for the heketi service in the Prometheus configmap. 
                # oc get cm prometheus -o yaml -n openshift-metrics
            ....
            - job_name: 'kubernetes-service-endpoints'

  	             tls_config:
    	           ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
                 # TODO: this should be per target
    	           insecure_skip_verify: true

  	             kubernetes_sd_configs:
  	             - role: endpoints

  	             relabel_configs:
    	           # only scrape infrastructure components
    	           - source_labels: [__meta_kubernetes_namespace]
      	         action: keep
      	         regex: 'default|logging|metrics|kube-.+|openshift|openshift-.+|app-storage'
    Copy to Clipboard Toggle word wrap
  3. Restart the prometheus-0 pod to query the Heketi metrics in Prometheus.
Volver arriba
Red Hat logoGithubredditYoutubeTwitter

Aprender

Pruebe, compre y venda

Comunidades

Acerca de la documentación de Red Hat

Ayudamos a los usuarios de Red Hat a innovar y alcanzar sus objetivos con nuestros productos y servicios con contenido en el que pueden confiar. Explore nuestras recientes actualizaciones.

Hacer que el código abierto sea más inclusivo

Red Hat se compromete a reemplazar el lenguaje problemático en nuestro código, documentación y propiedades web. Para más detalles, consulte el Blog de Red Hat.

Acerca de Red Hat

Ofrecemos soluciones reforzadas que facilitan a las empresas trabajar en plataformas y entornos, desde el centro de datos central hasta el perímetro de la red.

Theme

© 2025 Red Hat