EDB CloudNativePG Cluster 1.27.1 release notes v1.27.1

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Released: 24 October 2025

This release includes the following:

Enhancements

DescriptionAddresses
Added support for overriding the PgBouncer auth_type, server_tls_sslmode, and client_tls_sslmode settings

which were previously hardcoded. Default values remain consistent with the former behavior but can now be customized when required.

#8674
Added a CHECKPOINT step before PostgreSQL smart and fast shutdowns

to reduce shutdown duration and replica promotion time, especially on systems with a high checkpoint_timeout.

#8867
Added a warning in the instance manager for deprecated or unsupported OS versions

based on the official postgres-containers project.

#8601
Improved certificate parsing error reporting

Failures now log specific errors instead of a generic message, aiding troubleshooting. This is particularly relevant after the CVE-2025-58187 fix in Go 1.25.2 and 1.24.8, which may trigger parsing failures for invalid DNS SANs.

#8801
Added a check to ensure the destination WAL archive path is empty when bootstrapping a cluster using the pg_basebackup method

consistent with other bootstrap methods.

#8895
Added validation to prevent backups from running on hibernated clusters

Backups attempted on such clusters now fail with reason ClusterIsHibernated, following the standard prerequisite check pattern.

#8870
Added support for pprof profiling

Instances can now enable the pprof tool by adding the alpha.k8s.enterprisedb.io/enableInstancePprof annotation to the Cluster resource for advanced debugging.

#7876
Updated the Flexible I/O Tester (FIO) image in the cnp plugin

to wallnerryan/fiotools-aio:v2, as provided by Ryan Wallner.

#8847
Enhanced the `cnp status backup` command to provide more detailed status information when using a `barman-cloud`-based backup plugin#8780, #8690

Changes

DescriptionAddresses
Delayed the decommissioning of native in-core support for Barman Cloud to at least version 1.29.#8670
Adopted the new format of postgres-containers and postgis-containersimages and image catalog artifacts

and updated the default PostgreSQL version to 18.0-system-trixie (PostgreSQL 18 is now supported).

#8578, #8760, #8558
Deprecated the monitoring.enablePodMonitor field

in the Cluster and Pooler resources. This field will be removed in a future release. Users who rely on PodMonitor resources should create them manually instead.

#8753

Bug Fixes

DescriptionAddresses
Fixed backup restoration failures when using custom WAL segment sizes with parallel WAL recovery.

The operator no longer manages the end-of-WAL file marker during restoration, preventing errors when backups span multiple WAL segments.

#8873
Fixed a bug in major upgrades where a volume snapshot from a previous minor version could be incorrectly used to optimize replica creation.#8475
Fixed initdb to wait for the application user secret before bootstrapping a new cluster

preventing potential race conditions.

#8663
Fixed quorum-based failover to work correctly in clusters with only two instances using synchronous replication.#8680
Fixed configuration hash calculation to ignore internal configuration fields

preventing unnecessary reconciliations.

#8868
Fixed the connection retry logic in the cnpgi plugin

The reconciliation loop now detects connection pool changes correctly and uses exponential backoff to reduce "closed pool" errors.

#8554
Fixed volume snapshot usage during replica scaling to work with backup plugins.

Previously, this optimization was only available with the in-tree backup implementation, but now clusters using backup plugins can also leverage volume snapshots when creating new replicas.

#8506
Fixed the `Pooler` templating to correctly inherit settings for the bootstrap controller init container.#8394
Fixed webhook errors to use the correct API group

(postgresql.k8s.enterprisedb.io) in Pooler and backup webhooks, ensuring consistent API error reporting.

#8485
Fixed a potential nil pointer dereference in the hibernation reconciler

when handling errors. Contributed by @PascalBourdier.

#8756
Fixed an issue in the environment cache where callers could inadvertently modify shared data.

The LoadEnv function now returns a copy of cached environment slices to prevent mutations from affecting the cache.

#8880
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