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Dmitry Dolgov
d15f2d3392
Right now there are no readiness probes defined for connection pooler, which means after a pod restart there is a short time window (between a container start and connection pooler starting listening to a socket) when a service can send queries to a new pod, but connection will be refused. The pooler container is rather lightweight and it start to listen immediately, so the time window is small, but still. To fix this add a readiness probe for tcp socket opened by connection pooler.
Postgres Operator
The Postgres Operator delivers an easy to run highly-available PostgreSQL clusters on Kubernetes (K8s) powered by Patroni. It is configured only through Postgres manifests (CRDs) to ease integration into automated CI/CD pipelines with no access to Kubernetes API directly, promoting infrastructure as code vs manual operations.
Operator features
- Rolling updates on Postgres cluster changes, incl. quick minor version updates
- Live volume resize without pod restarts (AWS EBS, others pending)
- Database connection pooler with PGBouncer
- Restore and cloning Postgres clusters (incl. major version upgrade)
- Additionally logical backups to S3 bucket can be configured
- Standby cluster from S3 WAL archive
- Configurable for non-cloud environments
- Basic credential and user management on K8s, eases application deployments
- UI to create and edit Postgres cluster manifests
- Works well on Amazon AWS, Google Cloud, OpenShift and locally on Kind
PostgreSQL features
- Supports PostgreSQL 12, starting from 9.6+
- Streaming replication cluster via Patroni
- Point-In-Time-Recovery with pg_basebackup / WAL-E via Spilo
- Preload libraries: bg_mon, pg_stat_statements, pgextwlist, pg_auth_mon
- Incl. popular Postgres extensions such as decoderbufs, hypopg, pg_cron, pg_partman, pg_stat_kcache, pgq, plpgsql_check, postgis, set_user and timescaledb
The Postgres Operator has been developed at Zalando and is being used in production for over two years.
Getting started
For a quick first impression follow the instructions of this tutorial.
Supported setups of Postgres and Applications
Documentation
There is a browser-friendly version of this documentation at postgres-operator.readthedocs.io
- How it works
- Installation
- The Postgres experience on K8s
- The Postgres Operator UI
- DBA options - from RBAC to backup
- Build, debug and extend the operator
- Configuration options
- Postgres manifest reference
- Command-line options and environment variables
Community
There are two places to get in touch with the community:
- The GitHub issue tracker
- The #postgres-operator slack channel