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crunchy-pgbackrest

The crunchy-pgbackrest container is used for pgBackRest functions including backup, restore, info, stanza creation and as the pgBackRest remote repository.

See the pgBackRest guide for more details.

Running Modes

The crunchy-pgbackrest image can be run in modes to enable different functionality. The MODE environment variable must be set to run the image in the required mode. Each mode uses environment variables to configure how the container will be run.

Running Mode MODE setting
pgBackRest mode is used for taking pgBackRest backups, retrieving info and stanza creation. pgbackrest
pgBackRest Repo mode acts as a pgBackRest remote repository for the Postgres cluster to use for storing archive files and backups. pgbackrest-repo
pgBackRest Restore mode executes a pgBackRest restore independent of the Crunchy PostgreSQL Operator. pgbackrest-restore

Volumes

The following volumes are mounted by the crunchy-pgbackrest container:

  • Mounted pgbackrest.conf configuration file via the /pgconf volume (? not sure about this)
  • /backrestrepo volume used by the pgbackrest backup tool to store pgBackRest archives
  • /pgdata volume used to store the data directory contents for the PostgreSQL database
  • /sshd volume that contains the SSHD configuration from the backrest-repo-config secret

Major Packages

The crunchy-backrest-restore Docker image contains the following packages (versions vary depending on PostgreSQL version):

  • PostgreSQL (13.16 and 12.20)
  • pgBackRest (2.33)
  • CentOS 7, UBI 8 - publicly available
  • UBI 7, UBI 8 - customers only

Environment Variables

pgbackrest Mode

Name Default Description
COMMAND None Stores the pgBackRest command to execute.
COMMAND_OPTS None Options to append the the chosen pgbackrest command.
CRUNCHY_DEBUG FALSE Set this to true to enable debugging in logs. Note: this mode can reveal secrets in logs.
MODE None Sets the container mode. Accepted values are pgbackrest, pgbackrest-repo and pgbackrest-restore.
NAMESPACE None Namespace where the pod lives.
PGBACKREST_DB_PATH None PostgreSQL data directory. (deprecated)
PGBACKREST_REPO_PATH None Path where backups and archive are stored.
PGBACKREST_REPO_TYPE None Type of storage used for the repository.
PGBACKREST_STANZA None Defines the backup configuration for a specific PostgreSQL database cluster.
PGHA_PGBACKREST_LOCAL_GCS_STORAGE None Indicates whether or not local and gcs storage should be enabled for pgBackRest.
PGHA_PGBACKREST_LOCAL_S3_STORAGE None Indicates whether or not local and s3 storage should be enabled for pgBackRest.
PGHA_PGBACKREST_S3_VERIFY_TLS None Indicates whether or not TLS should be verified when making connections to S3 storage.
PITR_TARGET None Store the PITR target for a pgBackRest restore.
PODNAME None Stores the name of the pod to exec into for command execution.

pgbackrest-repo Mode

Name Default Description
CRUNCHY_DEBUG FALSE Set this to true to enable debugging in logs. Note: this mode can reveal secrets in logs.
MODE None Sets the container mode. Accepted values are pgbackrest, pgbackrest-repo and pgbackrest-restore.
PGBACKREST_DB_PATH None PostgreSQL data directory. (deprecated)
PGBACKREST_DB_HOST None PostgreSQL host for operating remotely via SSH. (deprecated)
PGBACKREST_LOG_PATH None Path where log files are stored.
PGBACKREST_PG1_PORT None Port that PostgreSQL is running on.
PGBACKREST_PG1_SOCKET_PATH None PostgreSQL unix socket path.
PGBACKREST_REPO_PATH None Path where backups and archive are stored.
PGBACKREST_STANZA None Defines the backup configuration for a specific PostgreSQL database cluster. Must be set to the desired stanza for restore.

pgbackrest-restore Mode

Name Default Description
CRUNCHY_DEBUG FALSE Set this to true to enable debugging in logs. Note: this mode can reveal secrets in logs.
MODE None Sets the container mode. Accepted values are pgbackrest, pgbackrest-repo and pgbackrest-restore.
BACKREST_CUSTOM_OPTS None Custom pgBackRest options can be added here to customize pgBackRest restores.
PGBACKREST_DELTA None Enables pgBackRest delta restore mode. Used when a user needs to restore to a volume that already contains PostgreSQL data files.
PGBACKREST_PG1_PATH None Path where PostgreSQL data directory can be found. This variable can also be used to setup a new PostgreSQL data directory on an empty volume.
PGBACKREST_STANZA None Must be set to the desired stanza for restore.
PGBACKREST_TARGET None PostgreSQL timestamp used when restoring up to a point in time. Required for Point In Time Recovery (PITR) restores.