#!/bin/sh

# Purpose {{{
##	This script will check if some Ceph related Debian packages are available
##		in APT cache.
##	And backup all of them (ceph, rados, rbd,…) in tar with version name and date.
#
##	You can use this script in a cron (for periodic backup of Ceph packages) or
##		directly.
# }}}

# Vars {{{
CEPH_DEB_DIR="/var/cache/apt/archives"
CEPH_DEB_PKG_FILE=$(find "${CEPH_DEB_DIR}" -maxdepth 1 -type f -iname "ceph*.deb" -print -quit)
CEPH_VERSION=$(ceph version | cut -d" " -f3)

BKP_DIR="/srv/ceph"
BKP_TAR_PATH="${BKP_DIR}/ceph-deb_${CEPH_VERSION}-$(date +%Y%m%d).tar"

EXISTENT_BACKUP_TAR="$(find "${BKP_DIR}" -type f -iname "ceph-deb_${CEPH_VERSION}*")"
# }}}

# Test if a "ceph" package is available
if [ "${CEPH_DEB_PKG_FILE}" ]; then

	mkdir -p -- "${BKP_DIR}"

	# If no backup of this version already exists, create a new one
	if [ "${EXISTENT_BACKUP_TAR}" ]; then
		printf '%b\n' "A backup of this version already exists : ${EXISTENT_BACKUP_TAR}"
	else
		printf '%b\n' "Backup of Ceph deb files in version : ${CEPH_VERSION}"
		tar cf "${BKP_TAR_PATH}" "${CEPH_DEB_DIR}"/*"${CEPH_VERSION}"*.deb > /dev/null 2>&1
	fi

fi

exit 0