postgres-backup-local

Backup PostgresSQL to the local filesystem with periodic rotating backups, based on schickling/postgres-backup-s3. Backup multiple databases from the same host by setting the database names in POSTGRES_DB separated by commas or spaces.

Supports the following Docker architectures: linux/amd64, linux/arm64, linux/arm/v7.

Usage

Docker:

$ docker run -e POSTGRES_HOST=postgres -e POSTGRES_DB=dbname -e POSTGRES_USER=user -e POSTGRES_PASSWORD=password  prodrigestivill/postgres-backup-local

Docker Compose:

version: '2'
services:
    postgres:
        image: postgres
        restart: always
        environment:
            - POSTGRES_DB=database
            - POSTGRES_USER=username
            - POSTGRES_PASSWORD=password
         #  - POSTGRES_PASSWORD_FILE=/run/secrets/db_password <-- alternative for POSTGRES_PASSWORD (to use with docker secrets)
    pgbackups:
        image: prodrigestivill/postgres-backup-local
        restart: always
        volumes:
            - /var/opt/pgbackups:/backups
        links:
            - postgres
        depends_on:
            - postgres
        environment:
            - POSTGRES_HOST=postgres
            - POSTGRES_DB=database
            - POSTGRES_USER=username
            - POSTGRES_PASSWORD=password
         #  - POSTGRES_PASSWORD_FILE=/run/secrets/db_password <-- alternative for POSTGRES_PASSWORD (to use with docker secrets)
            - POSTGRES_EXTRA_OPTS=-Z9 --schema=public --blobs
            - SCHEDULE=@daily
            - BACKUP_KEEP_DAYS=7
            - BACKUP_KEEP_WEEKS=4
            - BACKUP_KEEP_MONTHS=6
            - HEALTHCHECK_PORT=80

Environment Variables

Most variables are the same as in the official postgres image.

env variable	description
BACKUP_DIR	Directory to save the backup at. Defaults to /backups.
BACKUP_KEEP_DAYS	Number of daily backups to keep before removal. Defaults to 7.
BACKUP_KEEP_WEEKS	Number of weekkly backups to keep before removal. Defaults to 4.
BACKUP_KEEP_MONTHS	Number of monthly backups to keep before removal. Defaults to 6.
HEALTHCHECK_PORT	Port listening for cron-schedule health check. Defaults to 8080.
POSTGRES_DB	Comma or space separated list of postgres databases to backup. Required.
POSTGRES_DB_FILE	Alternative to POSTGRES_DB, but with one database per line, for usage with docker secrets.
POSTGRES_EXTRA_OPTS	Additional options for pg_dump. Defaults to -Z9.
POSTGRES_HOST	Postgres connection parameter; postgres host to connect to. Required.
POSTGRES_PASSWORD	Postgres connection parameter; postgres password to connect with. Required.
POSTGRES_PASSWORD_FILE	Alternative to POSTGRES_PASSWORD, for usage with docker secrets.
POSTGRES_PORT	Postgres connection parameter; postgres port to connect to. Defaults to 5432.
POSTGRES_USER	Postgres connection parameter; postgres user to connect with. Required.
POSTGRES_USER_FILE	Alternative to POSTGRES_USER, for usage with docker secrets.
SCHEDULE	Cron-schedule specifying the interval between postgres backups. Defaults to @daily.

Special Environment Variables

This variables are not intended to be used for normal deployment operations:

env variable	description
POSTGRES_PORT_5432_TCP_ADDR	Sets the POSTGRES_HOST when the latter is not set.
POSTGRES_PORT_5432_TCP_PORT	Sets POSTGRES_PORT when POSTGRES_HOST is not set.

Manual Backups

By default this container makes daily backups, but you can start a manual backup by running /backup.sh:

$ docker run -e POSTGRES_HOST=postgres -e POSTGRES_DB=dbname -e POSTGRES_USER=user -e POSTGRES_PASSWORD=password  prodrigestivill/postgres-backup-local /backup.sh

Automatic Periodic Backups

You can change the SCHEDULE environment variable in -e SCHEDULE="@daily" to alter the default frequency. Default is daily.

More information about the scheduling can be found here.

Folders daily, weekly and monthly are created and populated using hard links to save disk space.