What's New in This Guide

This section introduces the documentation updates for release 25.2.2xx.

Release 25.2.200- G45387-01, March 2026

General Updates

• Updated the release version to 25.2.200 in the entire document.
• Updated the release information in the Table 1-1 in the Oracle Error Correction Policy section.
• Added the OSO_APM_SVC in the Acronyms section.
• Updated the Key Information About OSO section to include apm-svc in the first step's sample output.
• Added a note related to the PVC sizing in the Creating Backup of Prometheus Time Series Database (TSDB) Using Snapshot Utility section.

Installation Updates

• Updated the versions for the following images in the Prerequisites section:
  • OSO_PROMETHEUS_IMAGE=occne.io/oso/prometheus:v3.6.0
  • OSO_SNAPSHOT_IMAGE=occne.io/occne/oso_snapshot:25.2.200
  • OSO_APM_IMAGE=occne.io/occne/oso_apm_service:25.2.200
  • OSO_ALERT_CONFIG_IMAGE =occne.io/occne/oso_alert_config:25.2.200
  • OSO_HELM_TEST_IMAGE=occne.io/occne/oso_helm_test:25.2.200
  • Helm version = 3.19.1
  • Kubernetes version = 1.34.1
• Added the OSO_APM_IMAGE image details in the Prerequisites section.
• Updated the Table 2-4 with the following details in the Resource Utilization section:
  • APM (Alert Processing Microservice)
  • Configmapreload Prometheus
  • Configmapreload Alertmanager
  • Helm test
  • Modified all the values for Prometheus except the CPU Initial Request (m) column.
• Updated the Installing OSO Using CSAR section with the oso-apm-service details.
• Removed content related to ClusterIP in the "To enable IPv6 DualStack in Prometheus" as it is not applicable for dual stack in the Installing OSO Using CSAR section.
• Added the Configuration of Alert Processing Microservice (APM) section with the procedure for installing and configuring the Alert Processing Microservice feature.
• Added the Alert Processing Microservice Configuration Parameters section to include the configuration parameters for APM service.
• Added all the parameters in the custom_values.yaml in the following sections:
  • Prometheus Configuration Parameters
  • Alertmanager Configuration Parameters
  • Alert Config Configuration Parameters

Upgrade and Rollback Updates

• Updated the upgrade paths in the Supported Upgrade Paths section.
• Updated the current release and the previous release versions in the following sections:
  • Prerequisites
  • Rollback Tasks
• Added a note to clarify that OSO pods do not automatically restart when configmap changes are made during an upgrade, and providing manual steps to ensure the pods retrieve the latest data in the Upgrading OSO section.
• Enhanced the existing note with a cause for the service interruption in the Upgrading OSO section .
• Updated the rollback paths in the Supported Rollback Paths section.
• Updated the Rollback Tasks section with a step to detach the PVC from old Prometheus pod and attach to the new Prometheus pod.
• Added a command to check the installed Helm charts in Rollback Tasks section.

Uninstall Updates

Added the procedure for uninstalling OSO resources in the Uninstalling OSO section.