Enhancements

This section outlines new features implemented in the Cluster release 8.8.0 that is introduced in the Container Cloud release 2.18.1.

MKE and MCR version update

Updated the Mirantis Kubernetes Engine (MKE) version from 3.4.7 to 3.4.8 and the Mirantis Container Runtime (MCR) version from 20.10.8 to 20.10.11.

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Elasticsearch switch to OpenSearch

As part of the Elasticsearch switching to OpenSearch, removed the Elasticsearch and Kibana services, as well as introduced a set of new parameters that will replace the current ones in future releases. The old parameters are supported and take precedence over the new ones. For details, see Deprecation notes and StackLight configuration parameters.

Note

In the Container Cloud web UI, the Elasticsearch and Kibana naming is still present. However, the services behind them have switched to OpenSearch and OpenSearch Dashboards.

Improvements to StackLight alerting

Implemented the following improvements to StackLight alerting:

  • Added the MCCClusterUpdating informational alert that raises when the Mirantis Container Cloud cluster starts updating.

  • Enhanced StackLight alerting by clarifying alert severity levels. Switched all Minor alerts to Warning. Now, only alerts of the following severities exist: informational, warning, major, and critical.

  • Enhanced the documentation by adding troubleshooting guidelines for the Kubernetes applications, resources, and storage alerts.

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Prometheus remote write

Implemented the capability to allow sending of metrics from Prometheus, using the Prometheus remote write feature to a custom monitoring endpoint.

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StackLight mandatory parameters

Defined the following parameters in the StackLight configuration of the Cluster object for all types of clusters as mandatory. This applies to the clusters with StackLight enabled only. For existing clusters, Cluster object will be updated automatically.

Important

When creating a new cluster, specify these parameters through the Container Cloud web UI or as described in StackLight configuration parameters. Update all cluster templates created before Container Cloud 2.18.0 that do not have values for these parameters specified. Otherwise, the Admission Controller will reject cluster creation.

Web UI parameter

API parameter

Enable Logging

logging.enabled

HA Mode

highAvailabilityEnabled

Prometheus Persistent Volume Claim Size

prometheusServer.persistentVolumeClaimSize

Elasticsearch Persistent Volume Claim Size

elasticsearch.persistentVolumeClaimSize

Elasticsearch retention time per index

Implemented the capability to configure the Elasticsearch retention time per logs, events, and notifications indices when creating a managed cluster through Container Cloud web UI.

The Retention Time parameter in the Container Cloud web UI is now replaced with the Logstash Retention Time, Events Retention Time, and Notifications Retention Time parameters.

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Create a cluster using web UI

Helm Controller monitoring

Implemented monitoring and added alerts for the Helm Controller service and the HelmBundle custom resources.

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Helm Controller alerts

Ceph daemons placement

Implemented the capability to configure the placement of the rook-ceph-operator, rook-discover, and csi-rbdplugin Ceph daemons.

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Specify placement of Ceph cluster daemons

Configurable timeouts for Ceph requests

Implemented configurable timeouts for Ceph requests processing. The default is set to 30 minutes. You can configure the timeout using the pgRebalanceTimeoutMin parameter in the Ceph Helm chart.

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Enable Ceph tolerations and resources management

Configurable replicas count for Ceph controllers

Implemented the capability to configure the replicas count for cephController, cephStatus, and cephRequest controllers using the replicas parameter in the Ceph Helm chart. The default is set to 3 replicas.

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Enable Ceph tolerations and resources management

Ceph KaaSCephCluster Controller

Implemented a separate ceph-kcc-controller that runs on a management cluster and manages the KaaSCephCluster custom resource (CR). Previously, the KaaSCephCluster CR was managed by bm-provider.

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Ceph overview