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 MCC). This means everything you need is in one place. The separate MCC documentation site will be retired, so please update your bookmarks for continued easy access to the latest content.

Tune StackLight for long-term log retention¶

Available since MCC 2.24.0 (Cluster release 14.0.0)

If you plan to switch to a long log retention period (months), tune StackLight by increasing the cluster.max_shards_per_node limit. This configuration enables OpenSearch to successfully accept new logs and prevents the maximum open shards error.

To tune StackLight for long-term log retention:

Increase the cluster.max_shards_per_node limit:

logging:
  extraConfig:
    cluster.max_shards_per_node: 10000

If you increase the limit to more than double the default value, increase the memory and CPU limit for opensearch to prevent MaxHeapUsage warnings.

For example, if you set cluster.max_shards_per_node: 20000, configure the resources:opensearch:limits section as follows:
```
resources:
  opensearch:
    limits:
      cpu: "8"
      memory: "45Gi"
```