This image runs pg_dump to backup data using cronjob to folder /backup. Backups are named with date and time, the latest backup is linked to /backup/latest.psql.gz.
Uses Alpine Linux for a small (36 MB) image.
docker run -d \
--env PG_HOST=postgresdb.host \
--env PG_PORT=5432 \
--env PG_USER=admin \
--env PG_PASS=password \
--volume host.folder:/backup
stffabi/postgres-backup
Moreover, if you link stffabi/postgres-backup to a postgres container with an alias named postgres, this image has defaults that will connect to postgres on port 5432 with user root and no password.
docker run -d -e PG_ALLOW_EMPTY_PASSWORD=true --name postgresdb postgres
docker run -d --link postgresdb:postgresdb -v host.folder:/backup stffabi/postgres-backup
UID the user id, default: 65534
GID the group id, default: 65534
PG_HOST the host/ip of your postgres database
PG_PORT the port number of your postgres database
PG_USER the username of your postgres database
PG_PASS the password of your postgres database
PG_DB the database name to dump
EXTRA_OPTS the extra options to pass to pg_dump command
CRON_TIME the interval of cron job to run pg_dump. `0 0 * * *` by default, which is every day at 00:00
MAX_BACKUPS the number of backups to keep. When reaching the limit, the old backup will be discarded. No limit by default
INIT_BACKUP if set, create a backup when the container starts
INIT_RESTORE_LATEST if set, restores latest backup
NO_CRON if set, do not start cron. Must be used with INIT_BACKUP to run a single backup and then exit
See the list of backups, you can run:
docker exec postgres-backup ls /backup
To restore database from a certain backup, simply run:
docker exec postgres-backup /restore.sh /backup/2015.08.06.171901.psql.gz
Add a GitHub issue.