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      Autonomous Operator 2.4 release is primarily focused on adding some key features introduced in Couchbase Server 7.1 to Autonomous Operator such as support for ARM platforms and Encrypted Certificates, as well as other improvements related to TLS Certificate Management, cloud backups, index configuration, and the Prometheus Exporter.

      ARM Platform Support

      Over the last few years, the ARM v8 processors which have generally been found in mobile devices, have gained popularity with both desktop hardware vendors and major Cloud Service providers. In Couchbase Server 7.1.0 we added support for AWS Graviton-based instances, and since Couchbase Server 7.1.1 we have published multi-arch Docker container images supporting both amd64 and arm64 architectures.

      Now, with Autonomous Operator 2.4, all tools and container images for Open Source Kubernetes platforms are available for both architectures, allowing deployments on either amd64 or arm64 as well as migrations between the two.

      Support for ARM on the OpenShift Container Platform was added in Operator 2.4.2.

      Encrypted Certificates

      Couchbase Server 7.1 introduced support for Encrypted Private Keys, allowing administrators to use an encrypted private key using PKCS #5 v2 algorithms like AES 256.

      Autonomous Operator 2.4 now exposes this feature, which prevents storing the TLS private key unencrypted anywhere on the system.

      See TLS Passphrase Protection for further details.

      TLS Certificate Management

      This release adds several other improvements in the area of TLS Certificate Management.

      With support for multiple Root CA’s in Server 7.1, certificates no longer need to be explicitly supplied for LDAP and instead can be placed inside the RootCAs array. See tlsSecret

      It is now possible to include multi-PEM CAs in the Server secretSource. See serverSecretName

      Certificate Rotation has been expanded to allow plain text reload as a last resort in case of already-expired certificates. See Replacing expired Certificates

      Relatedly, the Operator now raises Kubernetes Events when it detects TLS expiration.

      Cloud Backup Improvements

      Cloud Backup and Restore in Couchbase Server 7.1 now supports the use of Azure and GCP blob storage, and also adds the option to use an ephemeral volume for the staging directory. See Backup and Restore to a Cloud Store

      Storage Engines

      Couchbase Server 7.1 introduced a new Storage Engine, Magma, alongside the default of Couchstore.

      With Operator 2.4, the per-bucket Storage Engine setting is now exposed via storageBackend.

      Global Indexer Configuration

      To improve Secondary Index management on an Operator-managed cluster, two additional Couchbase Server features are now exposed:

      Prometheus Exporter Improvements

      Although the Exporter is no longer required when using Couchbase Server 7.x, which contains a native Prometheus endpoint, it may still be desirable to use the Couchbase Prometheus Exporter.

      This release adds performance improvements and tuning options, see Configure Prometheus Metrics Collection for details.

      Local Persistent Volumes (from Couchbase Autonomous Operator 2.4.1)

      In Kubernetes it is possible to use a local storage device (such as a disk, partition, or directory) as a Persistent Volume (see local).

      From Couchbase Autonomous Operator 2.4.1, it is now possible to use these Local Volumes when deploying Couchbase Server resources. See Local Persistent Volumes for full details.