Ceph

This section describes the alerts for the Ceph cluster.

• CephClusterHealthWarning

• CephClusterHealthCritical

• CephClusterTargetDown

• CephMonQuorumAtRisk

• CephOSDDown

• CephOSDDiskNotResponding

• CephOSDDiskUnavailable

• CephClusterFullWarning

• CephClusterFullCritical

• CephOSDPgNumTooHighWarning

• CephOSDPgNumTooHighCritical

• CephMonHighNumberOfLeaderChanges

• CephNodeDown

• CephOSDVersionMismatch

• CephMonVersionMismatch

• CephPGInconsistent

• CephPGUndersized

---

CephClusterHealthWarning

Severity	Warning
Summary	Ceph cluster health is WARNING.
Description	The Ceph cluster {{ $labels.rook_cluster }} is in the WARNING state. For details, run ceph -s.

CephClusterHealthCritical

Severity	Critical
Summary	Ceph cluster health is CRITICAL.
Description	The Ceph cluster {{ $labels.rook_cluster }} is in the CRITICAL state. For details, run ceph -s.

CephClusterTargetDown

Severity	Critical
Summary	Ceph cluster Prometheus target is down.
Description	Prometheus fails to scrape metrics from the Ceph cluster {{ $labels.rook_cluster }} endpoint(s) (more than 1/10 failed scrapes).

CephMonQuorumAtRisk

Severity	Major
Summary	Ceph cluster quorum at risk.
Description	The Ceph Monitors quorum on the {{ $labels.rook_cluster }} cluster is low.

CephOSDDown

Severity	Critical
Summary	Ceph OSDs are down.
Description	{{ $value }} Ceph OSDs on the {{ $labels.rook_cluster }} cluster are down. For details, run ceph osd tree.

CephOSDDiskNotResponding

Severity	Critical
Summary	Disk not responding.
Description	The {{ $labels.device }} disk device is not responding to {{ $labels.ceph_daemon }} on the {{ $labels.node }} node of the {{ $labels.rook_cluster }} Ceph cluster.

CephOSDDiskUnavailable

Severity	Critical
Summary	Disk not accessible.
Description	The {{ $labels.device }} disk device is not accessible by {{ $labels.ceph_daemon }} on the {{ $labels.node }} node of the {{ $labels.rook_cluster }} Ceph cluster.

CephClusterFullWarning

Severity	Warning
Summary	Ceph cluster is nearly full.
Description	The Ceph cluster {{ $labels.rook_cluster }} utilization has crossed 85%. Expansion is required.

CephClusterFullCritical

Severity	Critical
Summary	Ceph cluster is full.
Description	The Ceph cluster {{ $labels.rook_cluster }} utilization has crossed 95% and needs immediate expansion.

CephOSDPgNumTooHighWarning

Severity	Warning
Summary	Ceph OSDs have more than 200 PGs.
Description	Some Ceph OSDs on the {{ $labels.rook_cluster }} cluster contain more than 200 Placement Groups. This may have a negative impact on the cluster performance. For details, run ceph pg dump.

CephOSDPgNumTooHighCritical

Severity	Critical
Summary	Ceph OSDs have more than 300 PGs.
Description	Some Ceph OSDs on the {{ $labels.rook_cluster }} cluster contain more than 300 Placement Groups. This may have a negative impact on the cluster performance. For details, run ceph pg dump.

CephMonHighNumberOfLeaderChanges

Severity	Warning
Summary	Ceph cluster has too many leader changes.
Description	The Ceph Monitor {{ $labels.ceph_daemon }} on the {{ $labels.rook_cluster }} cluster has detected {{ $value }} leader changes per minute.

CephNodeDown

Severity	Critical
Summary	Ceph node {{ $labels.node }} went down.
Description	The Ceph node {{ $labels.node }} of the {{ $labels.rook_cluster }} cluster went down and requires immediate verification.

CephOSDVersionMismatch

Severity	Warning
Summary	Multiple versions of Ceph OSDs running.
Description	{{ $value }} different versions of Ceph OSD daemons are running on the {{ $labels.rook_cluster }} cluster.

CephMonVersionMismatch

Severity	Warning
Summary	Multiple versions of Ceph Monitors running.
Description	{{ $value }} different versions of Ceph Monitor components are running on the {{ $labels.rook_cluster }} cluster.

CephPGInconsistent

Severity	Warning
Summary	Too many inconsistent Ceph PGs.
Description	The Ceph cluster {{ $labels.rook_cluster }} detects inconsistencies in one or more replicas of an object in {{ $value }} Placement Groups on the {{ $labels.name }} pool.

CephPGUndersized

Severity	Warning
Summary	Too many undersized Ceph PGs.
Description	The Ceph cluster {{ $labels.rook_cluster }} reports {{ $value }} Placement Groups have fewer copies than the configured pool replication level on the {{ $labels.name }} pool.