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#!/bin/bash
#
# This script will gzip /mnt/backup/live/
# This script assumes /mnt/backup/snapshots/ is where we want to store archives
# This script will only keep 7 days worth of archives
# -- if you want to change this just change `MAX_BACKUPS`
#
# My personal setup:
# -- has this running daily with cron at 00:30z
# -- mounts /mnt/backup to it's own specific NFS share configured for the host
#
MAX_BACKUPS=7
tar -czf "/mnt/backup/snapshots/gwaine.snapshot.`date -Iseconds`.tar.gz" -C /mnt/backup/live .
COUNT=$(ls -1 /mnt/backup/snapshots/*.tar.gz 2>/dev/null | wc -l)
if [ "$COUNT" -gt $MAX_BACKUPS]; then
# why not just delete the oldest file only Trey???
# well I'll tell you why! If I want to change MAX_BACKUPS from 7 to 3
# I'll have a whole bunch of extra archives I don't want to keep
EXTRA=$((COUNT - MAX_BACKUPS))
ls -1T /mnt/backup/snapshots/*.tar.gz | tail -n "$EXTRA" | xargs rm -f
fi
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