Crunchy PostgreSQL Operator 4.2.0 Released - DCS HA, Synchronous Replication, Clone, and more

Posted on 2020-01-02 by Crunchy Data
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Crunchy Data is pleased to announce the release of the Crunchy PostgreSQL Operator 4.2.0, which automates and simplifies deploying and managing of open source PostgreSQL clusters on Kubernetes and other Kubernetes-enabled Platforms. Instructions for getting started with the PostgreSQL Operator can be found here:

This release introduces support for high-availability operations leveraging the Kubernetes distributed consensus store. This allows real-time failover to be independent from the PostgreSQL Operator. The PostgreSQL Operator uses the open source Patroni high-availability framework and the open source disaster recovery management tool pgBackRest to enable this functionality.

Major features for the 4.2.0 release include:

  • An improved PostgreSQL HA (high-availability) solution using distributed consensus that is backed by Kubernetes. This includes:
  • Elimination of the PostgreSQL Operator as the arbiter that decides when a cluster should fail over
  • Support for Pod anti-affinity, which indicates to Kubernetes schedule pods (e.g. PostgreSQL instances) on separate nodes
  • Failed primaries now automatically heal, which significantly reduces the time in which they can rejoin the cluster.
  • Introduction of synchronous replication for workloads that are sensitive to transaction loss (with a tradeoff of performance and potentially availability)
  • Standardization of physical backups and restores on pgBackRest
  • Introduction of the ability to clone PostgreSQL clusters using the pgo clone command. This feature copies the pgBackRest repository from a cluster and creates a new, single instance primary as its own cluster.
  • Allow one to use their own certificate authority (CA) when interfacing with the Operator API, and to specify usage of the CA from the pgo command-line interface (CLI)

For a full list of features, including detailed descriptions of these changes, please see the release notes.

The PostgreSQL Operator 4.2.0 release also includes the following software versions upgrades:

  • The PostgreSQL containers now use versions 12.1, 11.6, 10.11, 9.6.16, and 9.5.20.
  • pgBackRest is upgraded to use version 2.20
  • pgBouncer is upgraded to use version 1.12

The PostgreSQL Operator is tested with Kubernetes 1.13+ and other Kubernetes enabled platforms. For this release, we added compatibility with Kubernetes 1.16+.


Crunchy Data is proud to support the development and maintenance of the PostgreSQL Operator.