Ceph

This section describes the alerts for the Ceph cluster.

CephClusterHealthWarning

Severity	Warning
Summary	Ceph cluster health is `WARNING`.
Description	The Ceph cluster is in the `WARNING` state. For details, run ceph -s.

CephClusterHealthCritical

Severity	Critical
Summary	Ceph cluster health is `CRITICAL`.
Description	The Ceph 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 `{{ $labels.pod }}` Pod on the `{{ $labels.node }}` node.

CephDaemonSlowOps

Available MCC 2.24.0 (Cluster release 14.0.0)

Severity	Warning
Summary	`{{ $labels.ceph_daemon }}` operations are slow.
Description	`{{ $labels.ceph_daemon }}` operations take too long to process on the Ceph cluster (complaint time exceeded).

CephMonClockSkew

Available MCC 2.24.0 (Cluster release 14.0.0)

Severity	Warning
Summary	Ceph Monitor clock skew detected.
Description	Ceph Monitor clock drift exceeds configured threshold on the Ceph cluster.

CephMonQuorumAtRisk

Severity	Major
Summary	Ceph cluster quorum at risk.
Description	The Ceph Monitors quorum on the Ceph cluster is low.

CephOSDDown

Removed in MCC 2.25.0 (Cluster releases 17.0.0 and 16.0.0)

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.

CephOSDFlapping

Available MCC 2.24.0 (Cluster release 14.0.0)

Severity	Warning
Summary	Ceph OSDs flap due to network issues.
Description	The Ceph OSD `{{ $labels.ceph_daemon }}` on the Ceph cluster cluster changed between up and down state `{{ $value \| humanize }}` times for 5 minutes.

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 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 Ceph cluster.

CephOSDSlowClusterNetwork

Available MCC 2.24.0 (Cluster release 14.0.0)

Severity	Warning
Summary	Cluster network slows down Ceph OSD heartbeats.
Description	Ceph OSD heartbeats on the cluster network (backend) of the cluster are slow.

CephOSDSlowPublicNetwork

Available MCC 2.24.0 (Cluster release 14.0.0)

Severity	Warning
Summary	Public network slows down Ceph OSD heartbeats.
Description	Ceph OSD heartbeats on the public network (front end) are running slow.

CephClusterFullWarning

Severity	Warning
Summary	Ceph cluster is nearly full.
Description	The Ceph cluster utilization has crossed 85%. Expansion is required.

CephClusterFullCritical

Severity	Critical
Summary	Ceph cluster is full.
Description	The Ceph cluster utilization has crossed 95% and needs immediate expansion.

CephOSDPgNumTooHighWarning

Severity	Warning
Summary	Ceph OSDs have more than 200 PGs.
Description	Some Ceph OSDs 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 contain more than 300 Placement Groups. This may have a negative impact on the cluster performance. For details, run ceph pg dump.

CephMonHighNumberOfLeaderChanges

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

CephOSDNodeDown

Since MCC 2.25.0 (17.0.0 and 16.0.0) to replace CephNodeDown

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

CephNodeDown

“Renamed to CephOSDNodeDown in MCC 2.25.0 (17.0.0 and 16.0.0)

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 cluster.

CephMonVersionMismatch

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

CephPGInconsistent

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