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

Starting with MOSK 25.2, the MOSK documentation set will cover all product layers, including MOSK management (formerly MCC). This means everything you need will be in one place. The separate MCC documentation site will be retired, so please update your bookmarks for continued easy access to the latest content.

OpenSearch¶

This section describes the alerts for the OpenSearch service.

OpenSearchHeapUsageCritical
OpenSearchHeapUsageWarning
OpenSearchClusterStatusCritical
OpenSearchClusterStatusWarning
OpenSearchPVCMismatch
OpenSearchNumberOfRelocationShards
OpenSearchNumberOfInitializingShards
OpenSearchNumberOfUnassignedShards
OpenSearchNumberOfPendingTasks
OpenSearchStorageUsageCritical
OpenSearchStorageUsageMajor

OpenSearchHeapUsageCritical¶

Severity	Critical
Summary	OpenSearch heap usage is too high (>90%).
Description	The heap usage of the OpenSearch `{{ $labels.name }}` node from the cluster `{{ $labels.cluster }}` is over 90% for 5 minutes.

OpenSearchHeapUsageWarning¶

Severity	Warning
Summary	OpenSearch heap usage is high (>80%).
Description	The heap usage of the OpenSearch `{{ $labels.name }}` node from the cluster `{{ $labels.cluster }}` is over 80% for 5 minutes.

OpenSearchClusterStatusCritical¶

Severity	Critical
Summary	OpenSearch critical status.
Description	The OpenSearch `{{ $labels.cluster }}` cluster status has changed to `red`.

OpenSearchClusterStatusWarning¶

Severity	Warning
Summary	OpenSearch warning status.
Description	The OpenSearch `{{ $labels.cluster }}` cluster status has changed to `yellow`. The alert persists for the cluster in the `red` status.

OpenSearchPVCMismatch¶

Available since MCC 2.22.0 (Cluster release 11.6.0)

Severity	Warning
Summary	OpenSearch PVC size mismatch
Description	The PVC size requested by OpenSearch StatefulSet does not match the configured PVC size. To troubleshoot the issue, refer to OpenSearchPVCMismatch alert raises due to the OpenSearch PVC size mismatch.

OpenSearchNumberOfRelocationShards¶

Severity	Warning
Summary	Shards relocation takes more than 20 minutes.
Description	The number of relocating shards in the OpenSearch cluster `{{ $labels.cluster }}` is `{{ $value }}` for 20 minutes.

OpenSearchNumberOfInitializingShards¶

Severity	Warning
Summary	Shards initialization takes more than 10 minutes.
Description	The number of initializing shards in the OpenSearch cluster `{{ $labels.cluster }}` is `{{ $value }}` for 10 minutes.

OpenSearchNumberOfUnassignedShards¶

Removed in MCC 2.27.0 (17.2.0 and 16.2.0)

Severity	Major
Summary	Shards have unassigned status for 10 minutes.
Description	The number of unassigned shards in the OpenSearch cluster `{{ $labels.cluster }}` is `{{ $value }}` for 10 minutes.

OpenSearchNumberOfPendingTasks¶

Severity	Warning
Summary	Tasks have pending state for 10 minutes.
Description	The number of pending tasks in the OpenSearch cluster `{{ $labels.cluster }}` is `{{ $value }}` for 10 minutes. The cluster works slowly.

OpenSearchStorageUsageCritical¶

Available since MCC 2.26.0 (17.1.0 and 16.1.0)

Severity	Critical
Summary	OpenSearch node reached 95% of storage usage
Description	Storage usage of `{{ $labels.persistentvolumeclaim }}` PVC mounted to the OpenSearch node reached the 95% threshold.

OpenSearchStorageUsageMajor¶

Available since MCC 2.26.0 (17.1.0 and 16.1.0)

Severity	Major
Summary	OpenSearch node reached 90% of storage usage
Description	Storage usage of `{{ $labels.persistentvolumeclaim }}` PVC mounted to the OpenSearch node reached the 90% threshold.