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.

ZooKeeper

This section lists the alerts for ZooKeeper.

• ZooKeeperClusterTargetDown

• ZooKeeperClusterTargetsOutage

• ZooKeeperMissingFollowers

• ZooKeeperRequestOverload

• ZooKeeperRunningOutOfFileDescriptors

• ZooKeeperSyncOverload

---

ZooKeeperClusterTargetDown

Since 23.3 to replace ZooKeeperClusterTargetsOutage

Severity	Major
Summary	ZooKeeper cluster Prometheus targets outage.
Description	Prometheus fails to scrape metrics from the {{ $labels.pod }} Pod of the {{ $labels.cluster }} cluster on the {{ $labels.node }} node.

ZooKeeperClusterTargetsOutage

Replaced with ZooKeeperClusterTargetDown in 23.3

Severity	Major
Summary	ZooKeeper cluster Prometheus targets outage.
Description	Prometheus fails to scrape metrics from 2/3 of the {{ $labels.cluster }} cluster endpoints (more than 1/10 failed scrapes).

ZooKeeperMissingFollowers

Severity	Warning
Summary	ZooKeeper cluster has missing followers.
Description	The {{ $labels.cluster }} ZooKeeper cluster in the {{ $labels.namespace }} namespace has missing follower servers.

ZooKeeperRequestOverload

Severity	Warning
Summary	ZooKeeper server request overload.
Description	The {{ $labels.namespace }}/ {{ $labels.pod }} ZooKeeper Pod in the {{ $labels.cluster }} cluster is not keeping up with request handling.

ZooKeeperRunningOutOfFileDescriptors

Severity	Warning
Summary	ZooKeeper server is running out of file descriptors.
Description	The {{ $labels.namespace }}/{{ $labels.pod }} ZooKeeper Pod in the {{ $labels.cluster }} cluster is using at least 85% of available file descriptors.

ZooKeeperSyncOverload

Severity	Warning
Summary	ZooKeeper leader synchronization overload.
Description	The ZooKeeper leader in the {{ $labels.cluster }} cluster in the {{ $labels.namespace }} namespace is not keeping up with synchronization.