ansible/roles/postgresql/templates/backup.sh

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2020-08-01 16:44:04 -05:00
#! /bin/bash
#
# psql.sh
# Backup script for PostgreSQL. Meant to be sourced by our main backup script
# Copyright (C) 2020 Vintage Salt <rehashedsalt@cock.li>
#
# Distributed under terms of the MIT license.
#
set -e
export OUTDIR="$BACKUPSDIR/psql"
retention=5 # 5-day retention period
# Sanity checks
if [ -z "$BACKUPSDIR" ]; then
log "BACKUPSDIR was undefined. Run the main backup script instead of this one."
return 1
fi
if ! [ -d "$OUTDIR" ]; then
if ! mkdir "$OUTDIR"; then
log "Unable to find or create output directory: $OUTDIR"
return 2
fi
fi
# Enforce permissions on our output directory since the git user will need them
chown root. "$OUTDIR"
chmod 770 "$OUTDIR"
# Purge oldest backup if we need to
currentbackupcount="$(ls -1 "$OUTDIR" | wc -l)"
if (( currentbackupcount >= retention )); then
lastbackup="$(find "$OUTDIR" -name \*.pgdump.gz 2>/dev/null | sort | head -n 1)"
lastbackup="${lastbackup%-*.gz}"
if [ -f "$file" ]; then
log "Removing old backups for: $lastbackup"
for file in "$lastbackup"*; do
log "Removing old backup part: $file"
rm "$file"
done
fi
fi
# WE MAKE BACKUP NOW SERGEI
date="$(date -Iseconds)"
log "Creating DB backup"
sudo -Hu postgres pg_dumpall | gzip > "$OUTDIR/pgdumpall-$date.pgdump.gz"