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PostgreSQL Operator Containers Overview

PostgreSQL Operator Containers Overview

The PostgreSQL Operator orchestrates a series of PostgreSQL and PostgreSQL related containers containers that enable rapid deployment of PostgreSQL, including administration and monitoring tools in a Kubernetes environment. The PostgreSQL Operator supports PostgreSQL 9.5+ with multiple PostgreSQL cluster deployment strategies and a variety of PostgreSQL related extensions and tools enabling enterprise grade PostgreSQL-as-a-Service. A full list of the containers supported by the PostgreSQL Operator is provided below.

PostgreSQL Server and Extensions

  • PostgreSQL (crunchy-postgres). PostgreSQL database server. The crunchy-postgres container image is unmodified, open source PostgreSQL packaged and maintained by Crunchy Data.

  • PostGIS (crunchy-postgres-gis). PostgreSQL database server including the PostGIS extension. The crunchy-postgres-gis container image is unmodified, open source PostgreSQL packaged and maintained by Crunchy Data. This image is identical to the crunchy-postgres image except it includes the open source geospatial extension PostGIS for PostgreSQL in addition to the language extension PL/R which allows for writing functions in the R statistical computing language.

Backup and Restore

  • pgBackRest (crunchy-backrest-restore). pgBackRest is a high performance backup and restore utility for PostgreSQL. The crunchy-backrest-restore container executes the pgBackRest utility, allowing FULL and DELTA restore capability.

  • pg_basebackup (crunchy-backup). pg_basebackup is used to take base backups of a running PostgreSQL database cluster. The crunchy-backup container executes a full backup against another database container using the standard pg_basebackup utility that is included with PostgreSQL.

  • pgdump (crunchy-pgdump). The crunchy-pgdump container executes either a pg_dump or pg_dumpall database backup against another PostgreSQL database.

  • crunchy-pgrestore (restore). The restore image provides a means of performing a restore of a dump from pg_dump or pg_dumpall via psql or pg_restore to a PostgreSQL container database.

Administration Tools

  • pgAdmin4 (crunchy-pgadmin4). PGAdmin4 is a graphical user interface administration tool for PostgreSQL. The crunchy-pgadmin4 container executes the pgAdmin4 web application.

  • pgbadger (crunchy-pgbadger). pgbadger is a PostgreSQL log analyzer with fully detailed reports and graphs. The crunchy-pgbadger container executes the pgBadger utility, which generates a PostgreSQL log analysis report using a small HTTP server running on the container.

  • pg_upgrade (crunchy-upgrade). The crunchy-upgrade container contains 9.5, 9.6, 10, 11, and 12 PostgreSQL packages in order to perform a pg_upgrade from 9.5 to 9.6, 9.6 to 10, 10 to 11, and 11 to 12 versions.

  • scheduler (crunchy-scheduler). The crunchy-scheduler container provides a cron like microservice for automating pgBaseBackup and pgBackRest backups within a single namespace.

Metrics and Monitoring

  • Metrics Collection (crunchy-collect). The crunchy-collect container provides real time metrics about the PostgreSQL database via an API. These metrics are scraped and stored by a Prometheus time-series database and are then graphed and visualized through the open source data visualizer Grafana.

  • Grafana (crunchy-grafana). Grafana is an open source Visual dashboards are created from the collected and stored data that crunchy-collect and crunchy-prometheus provide for the crunchy-grafana container, which hosts an open source web-based graphing dashboard called Grafana.

  • Prometheus (crunchy-prometheus). Prometheus is a multi-dimensional time series data model with an elastic query language. It is used in collaboration with Crunchy Collect and Grafana to provide metrics.

Connection Pooling and Load Balancing

  • pgbouncer (crunchy-pgbouncer). pgbouncer is a lightweight connection pooler for PostgreSQL. The crunchy-pgbouncer container provides a pgbouncer image.

  • pgpool (crunchy-pgpool). pgPool II is a middleware that works between PostgreSQL servers and a PostgreSQL database client. The crunchy-pgpool container executes the utility. pgPool can be used to provide a smart PostgreSQL-aware proxy to a PostgreSQL cluster, both primary and replica, so that applications only have to work with a single database connection.