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Prometheus Cheatsheet

Filesystem / PVC / PV

Filesystem container

Section titled “Filesystem container”

Scritture filesystem per pod

Section titled “Scritture filesystem per pod”
rate(container_fs_writes_bytes_total{namespace!~"kube-.*|openshift-.*"}[5m])

Letture filesystem per pod

Section titled “Letture filesystem per pod”
rate(container_fs_reads_bytes_total{namespace!~"kube-.*|openshift-.*"}[5m])

I/O elevato (job / DB / export)

Section titled “I/O elevato (job / DB / export)”
rate(container_fs_writes_bytes_total{namespace!~"kube-.*|openshift-.*"}[1m])
+
rate(container_fs_reads_bytes_total{namespace!~"kube-.*|openshift-.*"}[1m])

Inode container in esaurimento

Section titled “Inode container in esaurimento”
(1 - (sum(container_fs_inodes_free{name!=""}) by (instance) / sum(container_fs_inodes_total) by (instance))) * 100 > 80

PVC

Section titled “PVC”

PVC capacity vs usage

Section titled “PVC capacity vs usage”
kubelet_volume_stats_used_bytes{namespace!~"kube-.*|openshift-.*"}
/
kubelet_volume_stats_capacity_bytes{namespace!~"kube-.*|openshift-.*"}

PVC quasi full (>80%)

Section titled “PVC quasi full (>80%)”
(
  kubelet_volume_stats_used_bytes{namespace!~"kube-.*|openshift-.*"}
  /
  kubelet_volume_stats_capacity_bytes{namespace!~"kube-.*|openshift-.*"}
) > 0.8

PVC in Pending

Section titled “PVC in Pending”
kube_persistentvolumeclaim_status_phase{phase="Pending"} == 1

Volume quasi pieno (<10% disponibile)

Section titled “Volume quasi pieno (<10% disponibile)”
kubelet_volume_stats_available_bytes / kubelet_volume_stats_capacity_bytes * 100 < 10

Volume pieno previsto entro 4 giorni

Section titled “Volume pieno previsto entro 4 giorni”
predict_linear(kubelet_volume_stats_available_bytes[6h:5m], 4 * 24 * 3600) < 0

PersistentVolume

Section titled “PersistentVolume”

PV in stato Failed/Pending

Section titled “PV in stato Failed/Pending”
kube_persistentvolume_status_phase{phase=~"Failed|Pending", job="kube-state-metrics"} > 0