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kube-state-metrics/docs/metrics/storage/persistentvolume-metrics.md

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PersistentVolume Metrics

Metric name Metric type Description Unit (where applicable) Labels/tags Status
kube_persistentvolume_annotations Gauge Kubernetes annotations converted to Prometheus labels controlled via --metric-annotations-allowlist persistentvolume=<persistentvolume-name>
annotation_PERSISTENTVOLUME_ANNOTATION=<PERSISTENTVOLUME_ANNOTATION>		 EXPERIMENTAL
kube_persistentvolume_capacity_bytes Gauge persistentvolume=<pv-name> STABLE
kube_persistentvolume_status_phase Gauge persistentvolume=<pv-name>
phase=<Bound|Failed|Pending|Available|Released>		 STABLE
kube_persistentvolume_claim_ref Gauge persistentvolume=<pv-name>
claim_namespace=<namespace>;
name=<name>;		 STABLE
kube_persistentvolume_labels Gauge Kubernetes labels converted to Prometheus labels controlled via --metric-labels-allowlist persistentvolume=<persistentvolume-name>
label_PERSISTENTVOLUME_LABEL=<PERSISTENTVOLUME_LABEL>		 STABLE
kube_persistentvolume_info Gauge Information about Persistent Volumes persistentvolume=<pv-name>
storageclass=<storageclass-name>
gce_persistent_disk_name=<pd-name>
host_path=<path-of-a-host-volume>
host_path_type=<host-mount-type>
ebs_volume_id=<ebs-volume-id>
azure_disk_name=<azure-disk-name>
fc_wwids=<fc-wwids-comma-separated>
fc_lun=<fc-lun>
fc_target_wwns=<fc-target-wwns-comma-separated>
iscsi_target_portal=<iscsi-target-portal>
iscsi_iqn=<iscsi-iqn>
iscsi_lun=<iscsi-lun>
iscsi_initiator_name=<iscsi-initiator-name>
local_path=<path-of-a-local-volume>
local_fs=<local-volume-fs-type>
nfs_server=<nfs-server>
nfs_path=<nfs-path>
csi_driver=<csi-driver>
csi_volume_handle=<csi-volume-handle>
reclaim_policy=<reclaim-policy>		 STABLE
kube_persistentvolume_created Gauge Unix creation timestamp seconds persistentvolume=<persistentvolume-name>
EXPERIMENTAL
kube_persistentvolume_deletion_timestamp Gauge Unix deletion timestamp seconds persistentvolume=<persistentvolume-name>
EXPERIMENTAL
kube_persistentvolume_csi_attributes Gauge CSI attributes of the Persistent Volume, disabled by default, manage with --metric-opt-in-list) persistentvolume=<persistentvolume-name>
csi_mounter=<csi-mounter>
csi_map_options=<csi-map-options>		 EXPERIMENTAL
kube_persistentvolume_volume_mode Gauge Volume Mode information for the PersistentVolume. persistentvolume=<persistentvolume-name>
volumemode=<volumemode>		 EXPERIMENTAL

Useful metrics queries

How to retrieve non-standard PV state

It is not straightforward to get the PV states for certain cases like "Terminating" since it is not stored behind a field in the PersistentVolume.Status.

So to mimic the logic used by the kubectl command line, you will need to compose multiple metrics.

Here is an example of a Prometheus rule that can be used to alert on a PV that has been in the Terminating state for more than 5m.

groups:
- name: PV state
  rules:
  - alert: PVBlockedInTerminatingState
    expr: kube_persistentvolume_deletion_timestamp * on(persistentvolume) group_left() (kube_persistentvolume_status_phase{phase="Bound"} == 1) > 0
    for: 5m
    labels:
      severity: warning
    annotations:
      summary: PV {{$labels.persistentvolume}} blocked in Terminating state.