What's New in This Guide

This section introduces the documentation updates for release 25.2.1xx.

Release 25.2.100 - G40498-01, November 2025

Generic Updates:

Updated the versions of the following common services in the Frequently Used Common Services section.

• Calico - 3.29.3
• containerd - 2.0.5
• CoreDNS - 1.12.0
• OCI Grafana - 7.5.14
• Helm - 3.18.2
• Istio - 1.24.0
• Jaeger - 1.69.0
• Kubernetes - 1.33.1
• Oracle Opensearch - 2.18.0
• Opensearch Dashboard - 2.27.0
• Prometheus - 3.4.1
• prometheus-kube-state-metric - 2.16.0
• prometheus-node-exporter - 1.9.1
• Prometheus Operator - 0.83.0
• rook - 1.16.7
• snmp-notifier - 2.0.0

Maintenance Procedures:

• Added the Secure DNS Zone Customization through CNLB chapter that explains the DNS Zone Customization functionality using CNLB.
• Updated the following sections to include CNLB and non-CNLB procedures to add or remove Kubernetes worker nodes:
  • Adding a Kubernetes Worker Node
  • Removing a Kubernetes Worker Node

Observability

Added the Custom Metrics section that lists the metrics that can be used to observe the cluster and monitor the cluster health from Prometheus.