chore(deps): update ghcr.io/cloudnative-pg/cloudnative-pg docker tag to v1.26.0-rc1-ubi9

[renovate]

This PR contains the following updates:

Package	Update	Change
ghcr.io/cloudnative-pg/cloudnative-pg	minor	1.25.1 -> 1.26.0-rc1-ubi9

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Release Notes

cloudnative-pg/cloudnative-pg (ghcr.io/cloudnative-pg/cloudnative-pg)

v1.26.0-rc1

Compare Source

Release date: Mar 28, 2025

Important Changes

• CloudNativePG is now officially a CNCF project: CloudNativePG has been accepted into the Cloud Native Computing Foundation (CNCF), marking a significant milestone in its evolution. As part of this transition, the project is now governed under CloudNativePG, a Series of LF Projects, LLC, ensuring long-term sustainability and community-driven innovation. (#​7203)

• Deprecation of Native Barman Cloud Support: Native support for Barman Cloud backups and recovery is now deprecated and will be fully removed in CloudNativePG 1.28.0. Users must begin migrating their existing clusters to the new Barman Cloud Plugin to ensure a smooth transition. (#​6876)

• End of Support for Barman 3.4 and Earlier: CloudNativePG no longer supports Barman versions 3.4 and earlier, including the capability detection framework. Users running older operand versions (from before April 2023) must update their operand before upgrading the operator to avoid compatibility issues. (#​7220)

• Hibernation Command Changes: The hibernate on and hibernate off commands in the cnpg plugin for kubectl now serve as shortcuts for declarative hibernation. The previous imperative approach has been removed in favor of this method. Additionally, the hibernate status command has been removed, as its functionality is now covered by the standard status command. Warning: Do not upgrade to version 1.26 of both the plugin and the operator unless you are prepared to migrate to the declarative hibernation method. (#​7155)

Features:

• Declarative Offline In-Place Major Upgrades of PostgreSQL: Introduced support for offline in-place major upgrades when a new operand container image with a higher PostgreSQL major version is applied to a cluster. During the upgrade, all cluster pods are shut down to ensure data consistency. A new job is created to validate upgrade conditions, run pg_upgrade, and set up new directories for PGDATA, WAL files, and tablespaces as needed. Once the upgrade is complete, replicas are re-created. Failed upgrades can be rolled back declaratively. (#​6664)

• Improved Startup and Readiness Probes for Replicas: Enhanced support for Kubernetes startup and readiness probes in PostgreSQL instances, providing greater control over replicas based on the streaming lag. (#​6623)

• Declarative management of extensions and schemas: Introduced the extensions and schemas stanzas in the Database resource to declaratively create, modify, and drop PostgreSQL extensions and schemas within a database. (#​7062)

Enhancements

• Introduced the STANDBY_TCP_USER_TIMEOUT operator configuration setting, allowing users to specify the tcp_user_timeout parameter on all standby instances managed by the operator. (#​7036)

• Added the pg_extensions metric, providing information about installed PostgreSQL extensions and their latest available versions. (#​7195)

• Introduced the DRAIN_TAINTS operator configuration option, enabling users to customize which node taints indicate a node is being drained. This replaces the previous fixed behavior of only recognizing node.kubernetes.io/unschedulable as a drain signal.

• Added the KUBERNETES_CLUSTER_DOMAIN configuration option to the operator, allowing users to specify the domain suffix for fully qualified domain names (FQDNs) generated within the Kubernetes cluster. If not set, it defaults to cluster.local. (#​6989)

• Added support for LZ4, XZ, and Zstandard compression methods when archiving WAL files via Barman Cloud (deprecated). (#​7151)

• Implemented the cnpg.io/validation annotation, enabling users to disable the validation webhook on CloudNativePG-managed resources. Use with caution, as this allows unrestricted changes. (#​7196)

• Added support for patching PostgreSQL instance pods using the cnpg.io/podPatch annotation with a JSON Patch. This may introduce discrepancies between the operator’s expectations and Kubernetes behavior, so it should be used with caution. (#​6323)

• Added support for collecting pg_stat_wal metrics in PostgreSQL 18. (#​7005)

• CloudNativePG Interface (CNPG-I):

  • A plugin can now trigger instance rollouts by implementing the EVALUATE verb, ensuring that plugin-induced changes are properly reconciled. (#​7126)

Fixes

• Resolved a race condition that caused the operator to perform two switchovers when updating the PostgreSQL configuration. (#​6991)

• Corrected the PodMonitor configuration by adjusting the matchLabels scope for the targeted pooler and cluster pods. Previously, the matchLabels were too broad, inadvertently inheriting labels from the cluster and leading to data collection from unintended targets. (#​7063)

• Added a webhook warning for clusters with a missing unit (e.g., MB, GB) in the shared_buffers configuration. This will become an error in future releases. Users should update their configurations to include explicit units (e.g., 512MB instead of 512). (#​7160)

• Treated timeout errors during volume snapshot creation as retryable to prevent unnecessary backup failures. (#​7010)

• cnpg plugin:

  • Ensured that the primary Pod is recreated during an imperative restart when primaryUpdateMethod is set to restart, aligning its definition with the replicas. (#​7122)

• CloudNativePG Interface (CNPG-I):

  • Implemented automatic reloading of TLS certificates for plugins when they change. (#​7029)
  • Ensured the operator properly closes the plugin connection when performing a backup using the plugin. (#​7095, #​7096)
  • Fixed an issue that prevented WALs from being archived on a former primary node when using a plugin. (#​6964)

Supported versions

• Kubernetes 1.32, 1.31, and 1.30
• PostgreSQL 17, 16, 15, 14, and 13
  • PostgreSQL 17.X is the default image
  • PostgreSQL 13 support ends on November 12, 2025

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