Enhancements

This section outlines new features and enhancements introduced in the Cluster release 6.14.0.


StackLight logging levels

Significantly enhanced the StackLight log collection mechanism to avoid collecting and keeping an excessive amount of log messages when it is not essential. Now, during or after deployment of StackLight, you can select one of the 9 available logging levels depending on the required severity. The default logging level is INFO.


Remote logging to syslog

Implemented the capability to configure StackLight to forward all logs to an external syslog server. In this case, StackLight will send logs both to the syslog server and to Elasticsearch, which is the default target.


Log collection optimization

Improved the log collection mechanism by optimizing the existing and adding new log parsers for multiple Container Cloud components.


Hyperconverged Ceph

Technology Preview

Implemented the capability to configure Ceph Controller to start pods on the taint nodes and manage the resources of Ceph nodes. Now, when bootstrapping a new management or managed cluster, you can specify requests, limits, or tolerations for Ceph resources. You can also configure resource management for an existing Ceph cluster. However, such approach may cause downtime.


Ceph objectStorage section in KaasCephCluster

Improved user experience by moving the rgw section of the KaasCephCluster CR to a common objectStorage section that now includes all RADOS Gateway configurations of a Ceph cluster. The spec.rgw section is deprecated. However, if you continue using spec.rgw, it will be automatically translated into the new objectStorage.rgw section during the Container Cloud update to 2.6.0.


Ceph maintenance orchestration

Implemented the capability to enable Ceph maintenance mode using the maintenance flag not only during a managed cluster update but also when required. However, Mirantis does not recommend enabling maintenance on production deployments other than during update.


Dedicated network for the Ceph distributed storage traffic

TECHNOLOGY PREVIEW

Added the possibility to configure dedicated networks for the Ceph cluster access and replication traffic using dedicated subnets. Container Cloud automatically configures Ceph to use the addresses from the dedicated subnets after you assign the corresponding addresses to the storage nodes.


Ceph Multisite configuration

Technology Preview

Implemented the capability to enable the Ceph Multisite configuration that allows object storage to replicate its data over multiple Ceph clusters. Using Multisite, such object storage is independent and isolated from another object storage in the cluster.


Ceph troubleshooting documentation

On top of continuous improvements delivered to the existing Container Cloud guides, added the Troubleshoot Ceph section to the Operations Guide. This section now contains a detailed procedure on a failed or accidentally removed Ceph cluster recovery.