#!/usr/bin/env bash
#
# Simplistic postgres backup
#
set -e

BACKUPROOT="/var/docker/postgresql_data/backup"
DBCONTAINER="flog_db"

if [ ! -d ${BACKUPROOT} ]; then
    echo "$0: Directory ${BACKUPROOT} does not exist - aborting."
    exit 1
fi

set -e

# keep seven days worth of dumps
rm -rf ${BACKUPROOT}/postgres-dumpall-flogdb.gz.7
test -f ${BACKUPROOT}/postgres-dumpall-flogdb.gz.6 && mv ${BACKUPROOT}/postgres-dumpall-flogdb.gz.6 ${BACKUPROOT}/postgres-dumpall-flogdb.gz.7
test -f ${BACKUPROOT}/postgres-dumpall-flogdb.gz.5 && mv ${BACKUPROOT}/postgres-dumpall-flogdb.gz.5 ${BACKUPROOT}/postgres-dumpall-flogdb.gz.6
test -f ${BACKUPROOT}/postgres-dumpall-flogdb.gz.4 && mv ${BACKUPROOT}/postgres-dumpall-flogdb.gz.4 ${BACKUPROOT}/postgres-dumpall-flogdb.gz.5
test -f ${BACKUPROOT}/postgres-dumpall-flogdb.gz.3 && mv ${BACKUPROOT}/postgres-dumpall-flogdb.gz.3 ${BACKUPROOT}/postgres-dumpall-flogdb.gz.4
test -f ${BACKUPROOT}/postgres-dumpall-flogdb.gz.2 && mv ${BACKUPROOT}/postgres-dumpall-flogdb.gz.2 ${BACKUPROOT}/postgres-dumpall-flogdb.gz.3
test -f ${BACKUPROOT}/postgres-dumpall-flogdb.gz.1 && mv ${BACKUPROOT}/postgres-dumpall-flogdb.gz.1 ${BACKUPROOT}/postgres-dumpall-flogdb.gz.2

echo "Running postgres pg_dumpall..."

cd ${BACKUPROOT}
/usr/bin/docker exec ${DBCONTAINER} sudo -u postgres /usr/bin/pg_dumpall | /bin/gzip > postgres-dumpall-flogdb.gz

mv ${BACKUPROOT}/postgres-dumpall-flogdb.gz ${BACKUPROOT}/postgres-dumpall-flogdb.gz.1