Mirantis Container Cloud (MCC) becomes part of Mirantis OpenStack for Kubernetes (MOSK)!

Starting with MOSK 25.2, the MOSK documentation set covers all product layers, including MOSK management (formerly Container Cloud). This means everything you need is in one place. Some legacy names may remain in the code and documentation and will be updated in future releases. The separate Container Cloud documentation site will be retired, so please update your bookmarks for continued easy access to the latest content.

Kubernetes storage

This section lists the alerts for Kubernetes storage.

For troubleshooting guidelines, see Troubleshoot Kubernetes storage alerts.

Caution

Due to the upstream bug in Kubernetes, metrics for the KubePersistentVolumeUsageCritical and KubePersistentVolumeFullInFourDays alerts that are collected for persistent volumes provisioned by cinder-csi-plugin are not available.

• KubePersistentVolumeUsageCritical

• KubePersistentVolumeFullInFourDays

• KubePersistentVolumeErrors

---

KubePersistentVolumeUsageCritical

Severity	Critical
Summary	PersistentVolume {{ $labels.persistentvolumeclaim }} has less than 3% of free space.
Description	The PersistentVolume claimed by {{ $labels.persistentvolumeclaim }} in the {{ $labels.namespace }} namespace is only {{ printf "%0.2f" $value }}% free.

KubePersistentVolumeFullInFourDays

Severity	Warning
Summary	PersistentVolume {{ $labels.persistentvolumeclaim }} is expected to fill up in 4 days.
Description	The PersistentVolume claimed by {{ $labels.persistentvolumeclaim }} in the {{ $labels.namespace }} namespace is expected to fill up within four days. Currently, {{ printf "%0.2f" $value }}% of free space is available.

KubePersistentVolumeErrors

Severity	Critical
Summary	PersistentVolume {{ $labels.persistentvolume }} is in the failed or pending state.
Description	The PersistentVolume {{ $labels.persistentvolume }} is in the failed or pending state.