Project: CloudNativePG (App Definition and Development / Database)
File: v1.21.md

History of user-visible changes in the 1.21 minor release of CloudNativePG. For a complete list of changes, please refer to the on the release branch in GitHub. Release date: Apr 24, 2024 !!! Warning Version 1.21 is approaching its End-of-Life (EOL) on May 24, 2024. If you haven't already, please begin planning for an upgrade promptly to ensure continued support and security. Enhancements: Users can now configure the `walloghints` PostgreSQL parameter (#4218) (#4218) Fully Qualified Domain Names (FQDN) in URIs for automatically generated secrets (#4095) Cleanup of instance Pods not owned by the Cluster during Cluster restore (#4141) Error detection when invoking `barman-cloud-wal-restore` in `recovery` bootstrap (#4101) Fixes: Ensured that before a switchover, the elected replica is in streaming replication (#4288) Correctly handle parsing errors of instances' LSN when sorting them (#4283) Recreate the primary Pod if there are no healthy standbys available to promote (#4132) Cleanup `PGDATA` in case of failure of the restore job (#4151) Reload certificates on configuration update (#3705) `cnpg` plugin for `kubectl`: Improve the arguments handling of `destroy`, `fencing`, and `promote` plugin commands (#4280) Correctly handle the percentage of the backup progress in `cnpg status` (#4131) Gracefully handle databases with no sequences in `sync-sequences` command (#4346) Changes: The Grafana dashboard now resides at https://github.com/cloudnative-pg/grafana-dashboards (#4154) Release date: Mar 14, 2024 Allow customization of the `wal_level` GUC in PostgreSQL (#4020) Add the `cnpg.io/skipWalArchiving` annotation to disable WAL archiving when set to `enabled` (#4055) Enrich the `cnpg` plugin for `kubectl` with the `publication` and `subscription` command groups to imperatively set up PostgreSQL native logical replication (#4052) Allow customization of `CERTIFICATEDURATION` and `EXPIRINGCHECK_THRESHOLD` for automated management of TLS certificates handled by the operator (#3686) Introduce initial support for tab-completion with the `cnpg` plugin for `kubectl` (#3875) Retrieve the correct architecture's binary from the corresponding catalog in the running operator image during in-place updates, enabling the operator to inject the correct binary into any Pod with a supported architecture (#3840) Properly synchronize PVC group labels with those on the pods, a critical aspect when all pods are deleted and the operator needs to decide which Pod to recreate first (#3930) Disable `walsendertimeout` when cloning a replica to prevent timeout errors due to slow connections (#4080) Ensure that volume snapshots are ready before initiating recovery bootstrap procedures, preventing an error condition where recovery with incomplete backups could enter an error loop (#3663) Prevent an error loop when unsetting connection limits in managed roles (#3832) Resolve a corner case in hibernation where the instance pod has been deleted, but the cluster status still has the hibernation condition set to false (#3970) Correctly detect Google Cloud capabilities for Barman Cloud (#3931) Use `Role` instead of `ClusterRole` for operator permissions in OLM, requiring fewer privileges when installed on a per-namespace basis (#3855, Enforce fully-qualified object names in SQL queries for the PgBouncer pooler (#4080) Follow Kubernetes recommendations to switch from client-side to server-side application of manifests, requiring the `--server-side` option by default when installing the operator (#3729). Set the default operand image to PostgreSQL 16.2 (#3823). Release date: Feb 2, 2024 Enhancements: Tailor ephemeral volume storage in a Postgres cluster using a claim template through the `ephemeralVolumeSource`

(#3678) Introduce the `pgadmin4` command in the `cnpg` plugin for `kubectl`, providing a straightforward method to demonstrate connecting to a given database cluster and navigate its content in a local environment such as kind - for evaluation purposes only (#3701) Allow customization of PostgreSQL's ident map file via the `.spec.postgresql.pg_ident` stanza, through a list of user name maps (#3534) Fixes: Prevent an unrecoverable issue with `pg_rewind` failing due to `postgresql.auto.conf` being read-only on clusters where the `ALTER SYSTEM` SQL command is disabled - the default (#3728) Reduce the risk of disk space shortage when using the import facility of the `initdb` bootstrap method, by disabling the durability settings in the PostgreSQL instance for the duration of the import process (#3743) Avoid pod restart due to erroneous resource quantity comparisons, e.g. "1 != 1000m" (#3706) Properly escape reserved characters in `pgpass` connection fields (#3713) Prevent systematic rollout of pods due to considering zero and nil different values in `.spec.projectedVolumeTemplate.sources` (#3647) Ensure configuration coherence by pruning from `postgresql.auto.conf` any options now incorporated into `override.conf` (#3773) Release date: Dec 21, 2023 Security: By default, TLSv1.3 is now enforced on all PostgreSQL 12 or higher installations. Additionally, users can configure the `ssl_ciphers`, `sslminprotocolversion`, and `sslmaxprotocolversion` GUCs (#3408). Integration of Docker image scanning with Dockle and Snyk to enhance security measures (#3300). Enhancements: Improved reconciliation of external clusters (#3533). Introduction of the ability to enable/disable the `ALTER SYSTEM` command (#3535). Support for Prometheus' dynamic relabeling through the `podMonitorMetricRelabelings` and `podMonitorRelabelings` options in the `.spec.monitoring` stanza of the `Cluster` and `Pooler` resources (#3075). Enhanced computation of the first recoverability point and last successful backup by considering volume snapshots alongside object-store backups (#2940). <!-- NO 1.20 --> Elimination of the use of the `PGPASSFILE` environment variable when establishing a network connection to PostgreSQL (#3522). Improved `cnpg report` plugin command by collecting a cluster's PVCs (#3357). Enhancement of the `cnpg status` plugin command, providing information about managed roles, including alerts (#3310). Introduction of Red Hat UBI 8 container images for the operator, suitable for OLM deployments. <!-- NO 1.20 --> Connection pooler: Scaling down instances of a `Pooler` resource to 0 is now possible (#3517). Addition of the `cnpg.io/podRole` label with a value of 'pooler' to every pooler deployment, differentiating them from instance pods (#3396). Fixes: Reconciliation of metadata, annotations, and labels of `PodDisruptionBudget` resources (#3312 and #3434). Reconciliation of the metadata of the managed credential secrets (#3316). Resolution of a bug in the backup snapshot code where an error reading the body would be handled as an overall error, leaving the backup process indefinitely stuck (#3321). Implicit setting of online backup with the `cnpg backup` plugin command when either `immediate-checkpoint` or `wait-for-archive` options are requested (#3449). Disabling of walsendertimeout when joining through pg_basebackup (#3586) Reloading of secrets used by external clusters (#3565) Connection pooler: Ensuring the controller watches all secrets owned by a `Pooler` resource (#3428). Reconciliation of `RoleBinding` for `Pooler` resources (#3391). Reconciliation of `imagePullSecret` for `Pooler` resources (#3389). Reconciliation of the service of a `Pooler` and addition of the required labels (#3349). Extension of `Pooler` labels to the deployment as well, not just the pods (#3350). Changes: Default operand image set to PostgreSQL

(#3270). Release date: Nov 3, 2023 Enhancements: Introduce support for online/hot backups with volume snapshots by using the PostgreSQL API for physical online base backups. Default configuration for hot/cold backups on a given Postgres cluster can be controlled through the `online` option and the `onlineConfiguration` stanza in `.spec.backup.volumeSnapshot`. Unless explicitly set, backups on volume snapshots are now taken online by default (#3102) Introduce the possibility to override the above default settings on volume snapshot backup using the `ScheduledBackup` and `Backup` resources (#3208, #3226) Enhance cold backup on volume snapshots by reducing the time window in which the target instance (standby or primary) is fenced, by lifting it as soon as the volume snapshot have been cut and provisioned (#3210) During a recovery from volume snapshots, ensure that the provided volume snapshots are coherent by validating the existing labels and annotations The `backup` command of the `cnpg` plugin for `kubectl` improves the volume snapshot backup experience through the `--online`, `--immediate-checkpoint`, and `--wait-for-archive` runtime options Enhance the `status` command of the `cnpg` plugin for `kubectl` with progress information on active streaming base backups (#3101) Allow the configuration of `maxpreparedstatements` with the pgBouncer `Pooler` resource (#3174) Fixes: Suspend WAL archiving during a switchover and resume it when it is completed (#3227) Ensure that the instance manager always uses `synchronous_commit = local` when managing the PostgreSQL cluster (#3143) Custom certificates for streaming replication user through `.spec.certificates.replicationTLSSecret` are now working (#3209) Set the `cnpg.io/cluster` label to the `Pooler` pods (#3153) Reduce the number of labels in `VolumeSnapshots` resources and render them into more appropriate annotations (#3151) Changes: Volume snapshot backups, introduced in 1.21.0, are now online/hot by default; in order to restore offline/cold backups set `.spec.backup.volumeSnapshot` to `false` Stop using the `postgresql.auto.conf` file inside PGDATA to control Postgres replication settings, and replace it with a file named `override.conf` (#2812) Technical enhancements: Use extended query protocol for PostgreSQL in the instance manager (#3152) Release date: Oct 12, 2023 !!! Important "Important changes from previous versions" This release contains a few changes to the default settings of CloudNativePG with the goal to improve general stability and security through predefined values. If you are upgrading from a previous version, please carefully read the "Important Changes" section below, as well as the . Features: Volume Snapshot support for backup and recovery: leverage the standard Kubernetes API on Volume Snapshots to take advantage of capabilities like incremental and differential copy for both backup and recovery operations. This first step, covering cold backups from a standby, will continue in 1.22 with support for hot backups using the PostgreSQL API and tablespaces. OLM installation method: introduce support for Operator Lifecycle Manager via OperatorHub.io for the latest patch version of the latest minor release through the stable channel. Many thanks to EDB for donating the bundle of their "EDB Postgres for Kubernetes" operator and adapting it for CloudNativePG. Important Changes: Change the default value of `stopDelay` to 1800 seconds instead of 30 seconds (#2848) Introduce a new parameter, called `smartShutdownTimeout`, to control the window of time reserved for the smart shutdown of Postgres to complete; the general formula to compute the overall timeout to stop Postgres is `max(stopDelay - smartShutdownTimeout, 30)` (#2848) Change the default value of `startDelay` to 3600, instead of 30

(#2847) Replace the livenessProbe initial delay with a more proper Kubernetes startup probe to deal with the start of a Postgres server (#2847) Change the default value of `switchoverDelay` to 3600 seconds instead of 40000000 seconds (#2846) Disable superuser access by default for security (#2905) Enable replication slots for HA by default (#2903) Stop supporting the `postgresql` label - replaced by `cnpg.io/cluster` in 1.18 (#2744) Security: Add a default `seccompProfile` to the operator deployment (#2926) Enhancements: Enable bootstrap of a replica cluster from a consistent set of volume snapshots (#2647) Enable full and Point In Time recovery from a consistent set of volume snapshots (#2390) Introduce the `cnpg.io/coredumpFilter` annotation to control the content of a core dump generated in the unlikely event of a PostgreSQL crash, by default set to exclude shared memory segments from the dump (#2733) Allow to configure ephemeral-storage limits for the shared memory and temporary data ephemeral volumes (#2830) Validate resource limits and requests through the webhook (#2663) Ensure that PostgreSQL's `shared_buffers` are coherent with the pods' allocated memory resources (#2840) Add `uri` and `jdbc-uri` fields in the credential secrets to facilitate developers when connecting their applications to the database (#2186) Add a new phase `Waiting for the instances to become active` for finer control of a cluster's state waiting for the replicas to be ready (#2612) Improve detection of Pod rollout conditions through the `podSpec` annotation (#2243) Add primary timestamp and uptime to the kubectl plugin's `status` command (#2953) Fixes: Ensure that the primary instance is always recreated first by prioritizing ready PVCs with a primary role (#2544) Honor the `cnpg.io/skipEmptyWalArchiveCheck` annotation during recovery to bypass the check for an empty WAL archive (#2731) Prevent a cluster from being stuck when the PostgreSQL server is down but the pod is up on the primary (#2966) Avoid treating the designated primary in a replica cluster as a regular HA replica when replication slots are enabled (#2960) Reconcile services every time the selectors change or when labels/annotations need to be changed (#2918) Defaults to `app` both the owner and database during recovery bootstrap (#2957) Avoid write-read concurrency on cached cluster (#2884) Remove empty items, make them unique and sort in the `ResourceName` sections of the generated roles (#2875) Ensure that the `ContinuousArchiving` condition is properly set to 'failed' in case of errors (#2625) Make the `Backup` resource reconciliation cycle more resilient on interruptions by stopping only if the backup is completed or failed (#2591) Reconcile PodMonitor `labels` and `annotations` (#2583) Fix backup failure due to missing RBAC `resourceNames` on the `Role` object (#2956) Observability: Add TCP port label to default `pgstatreplication` metric (#2961) Fix the `pgwalstat` default metric for Prometheus (#2569) Improve the `pg_replication` default metric for Prometheus (#2744 and Use `alertInstanceLabelFilter` instead of `alertName` in the provided Grafana dashboard Enforce `standardconformingstrings` in metric collection (#2888) Changes: Set the default operand image to PostgreSQL 16.0 Fencing now uses PostgreSQL's fast shutdown instead of smart shutdown to halt an instance (#3051) Rename webhooks from kb.io to cnpg.io group (#2851) Replace the `cnpg snapshot` command with `cnpg backup -m volumeSnapshot` for the `kubectl` plugin Let the `cnpg hibernate` plugin command use the `ClusterManifestAnnotationName` and `PgControldataAnnotationName` annotations on PVCs (#2657) Add the `cnpg.io/instanceRole` label while deprecating the existing `role` label (#2915) Technical enhancements: Replace `k8s-api-docgen` with `gen-crd-api-reference-docs` to automatically build the API reference documentation (#2606)