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Release date: May 23, 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 version 1.28.0. Although still available in the current release, users are strongly encouraged to begin migrating their existing clusters to the new Barman Cloud Plugin to ensure a smooth and seamless transition. The plugin should also be used for all new deployments. This change marks the first step toward making CloudNativePG a backup-agnostic solution, a goal that will be fully realized when volume snapshot support is also moved to a plugin-based architecture. (#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 an opt-in experimental feature to enhance the liveness probe with network isolation detection for primary instances. This feature can be activated via the alpha.cnpg.io/livenessPinger annotation (#7466).
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)
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. (#6928)
Added a new field in the status of the Cluster resource to track the latest known Pod IP (#7546).
Added the pg_extensions metric, providing information about installed PostgreSQL extensions and their latest available versions. (#7195)
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)
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)
Removed the ENABLE_AZURE_PVC_UPDATES configuration, as it is no longer required to resize Azure volumes correctly. The Azure CSI driver includes the necessary fix as of version 1.11.0. (#7297)
The .spec.backup.barmanObjectStore and .spec.backup.retentionPolicy fields are now deprecated in favor of the external Barman Cloud Plugin, and a warning is now emitted by the admission webhook when these fields are used in the Cluster specification (#7500).
Added support for LZ4, XZ, and Zstandard compression methods when archiving WAL files via Barman Cloud (deprecated). (#7151)
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)
Introduced support for WAL recovery via CNPG-I plugins during snapshot restore. (#7284)
Security
Set imagePullPolicy to Always for the operator deployment to ensure that images are always pulled from the registry, reducing the risk of using outdated or potentially unsafe local images. (#7250)
Fixes
Fixed native replication slot synchronization and logical replication failover for PostgreSQL 17 by appending the dbname parameter to primary_conninfo in replica configurations (#7298).
Fixed a regression in WAL restore operations that prevented fallback to the in-tree barmanObjectStore configuration defined in the externalCluster source when a plugin failed to locate a WAL file (#7507).
Improved backup efficiency by introducing a fail-fast mechanism in WAL archiving, allowing quicker detection of unexpected primary demotion and avoiding unnecessary retries (#7483).
Fixed an off-by-one error in parallel WAL archiving that could cause one extra worker process to be spawned beyond the requested number (#7389).
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)
Moved the defaulting logic for .spec.postgresql.synchronous.dataDurability from the CRD to the webhook to avoid UI issues with OLM. (#7600)
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)
Improved performance and resilience of CNPG-I by removing timeouts for local plugin operations, avoiding failures during longer backup or WAL archiving executions (#7496).
cnpg plugin:
Increased the buffer size in the logs pretty command to better handle larger log output (#7281).
Ensured the plugin-name parameter is required for plugin-based backups and disallowed for non-plugin backup methods (#7506).
Ensured that the primary Pod is recreated during an imperative restart when primaryUpdateMethod is set to restart, aligning its definition with the replicas. (#7122)
Changes
Updated the default PostgreSQL version to 17.5 for new cluster definitions. (#7556)
Updated the default PgBouncer version to 1.24.1 for new Pooler deployments (#7399).
