Container Image Requirements

The CloudNativePG operator for Kubernetes is designed to work with any compatible container image of PostgreSQL that complies with the following requirements:

• PostgreSQL 10+ executables that must be in the path:
  • initdb
  • postgres
  • pg_ctl
  • pg_controldata
  • pg_basebackup
• Barman Cloud executables that must be in the path:
  • barman-cloud-backup
  • barman-cloud-backup-delete
  • barman-cloud-backup-list
  • barman-cloud-check-wal-archive
  • barman-cloud-restore
  • barman-cloud-wal-archive
  • barman-cloud-wal-restore
• PGAudit extension installed (optional - only if PGAudit is required in the deployed clusters)
• Sensible locale settings

No entry point and/or command is required in the image definition, as CloudNativePG overrides it with its instance manager.

EDB provides and supports public container images for CloudNativePG and publishes them on ghcr.io.

Image tag requirements

While the image name can be anything valid for Docker, the CloudNativePG operator relies on the image tag to detect the Postgres major version carried out by the image.

The image tag must start with a valid PostgreSQL major version number (e.g. 9.6 or 12) optionally followed by a dot and the patch level.

The prefix can be followed by any valid character combination that is valid and accepted in a Docker tag, preceded by a dot, an underscore, or a minus sign.

Examples of accepted image tags:

• 9.6.19-alpine
• 12.4
• 11_1
• 13
• 12.3.2.1-1