scripts/ceph/ceph.backup.deb.files.sh

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#!/bin/sh
# Purpose {{{
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## This script will check if Ceph is available on the system.
## And download all deb files of all Ceph related packages installed on the system
## (eg. ceph, rbd, rados,…).
#
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## You can use this script in a cron (for periodic backup of Ceph packages) or directly.
# }}}
# Vars {{{
PROGNAME=$(basename "${0}"); readonly PROGNAME
PROGDIR=$(readlink -m $(dirname "${0}")); readonly PROGDIR
ARGS="${*}"; readonly ARGS
readonly NBARGS="${#}"
[ -z "${DEBUG}" ] && DEBUG=1
# Default values for some vars
CEPH_VERSION_DEFAULT=$(ceph version | cut -d" " -f3)
BKP_DIR_DEFAULT="/srv/ceph"
## Colors
readonly PURPLE='\033[1;35m'
readonly RED='\033[0;31m'
readonly RESET='\033[0m'
readonly COLOR_DEBUG="${PURPLE}"
# }}}
usage() { # {{{
cat <<- EOF
usage: $PROGNAME [-d]
Try to download all deb files of all Ceph related packages installed
on the system (eg. ceph, rbd, rados,…) and create one tar file.
EXAMPLES:
- Backup Ceph related packages to default directory (${BKP_DIR_DEFAULT})
${PROGNAME}
- Store tar files to a different location
${PROGNAME} --dir /opt/backup/ceph
OPTIONS:
-d,--dir,--directory
Path to store tar files
(default: ${BKP_DIR_DEFAULT})
--debug
Enable debug messages.
--help
Print this help message.
EOF
}
# }}}
debug_message() { # {{{
local_message="${1}"
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## Print message if DEBUG is enable (=0)
[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6b\e[m\n' "DEBUG ${PROGNAME}: ${local_message}"
return 0
}
# }}}
error_message() { # {{{
local_error_message="${1}"
local_error_code="${2}"
## Print error message
printf '%b\n' "ERROR ${PROGNAME}: ${RED}${local_error_message}${RESET}"
exit "${local_error_code:=66}"
}
# }}}
define_vars() { # {{{
# If BKP_DIR wasn't defined (argument) {{{
if [ -z "${BKP_DIR}" ]; then
## Use default value
BKP_DIR="${BKP_DIR_DEFAULT}"
fi
# }}}
# If CEPH_VERSION wasn't defined (argument) {{{
if [ -z "${CEPH_VERSION}" ]; then
## Use default value
CEPH_VERSION="${CEPH_VERSION_DEFAULT}"
fi
# }}}
# If CEPH_VERSION remains empty {{{
if [ -z "${CEPH_VERSION}" ]; then
error_message "Can't get ceph version. \
Ensure you have enought permissions to run \`ceph\` command." 01
fi
# }}}
BKP_TAR_PATH="${BKP_DIR}/ceph-deb_${CEPH_VERSION}-$(date +%Y%m%d).tar"
EXISTENT_BACKUP_TAR="$(find "${BKP_DIR}" -type f -iname "ceph-deb_${CEPH_VERSION}*")"
CEPH_DEB_PKG_PATTERN="ceph|Ceph|rados|RADOS|rbd|rgw"
## Temp file vars {{{
CEPH_DEB_PKG_DIR=$(mktemp --directory --tmpdir="/tmp" -- ceph-deb-files-XXXXXX.tmp)
## }}}
}
# }}}
main() { # {{{
## If Ceph is not available on the system {{{
### AND Exit with error
! command -v ceph >/dev/null \
&& error_message "Ceph doesn't seems to be available on this host. Please take a look to \`ceph version\` command." 11
## }}}
## Define all vars
define_vars
## If a backup already exists {{{
### AND Print debug message
### AND Delete temp directory
### AND Exit
test -f "${EXISTENT_BACKUP_TAR}" \
&& debug_message "A backup of this version already exists: ${EXISTENT_BACKUP_TAR}" \
&& rmdir -- "${CEPH_DEB_PKG_DIR}" \
&& exit 0
## }}}
## Ensure backup directory exists
mkdir --parents -- "${BKP_DIR}"
## Go to temp directory
cd -- "${CEPH_DEB_PKG_DIR}" > /dev/null \
|| error_message "Can't cd to ${CEPH_DEB_PKG_DIR}" 12
## Download deb files of all ceph related packages installed on the system
debug_message "Download (with apt) deb files of all ceph related packages installed on the system."
apt download -- $(dpkg -l | awk -v pattern="${CEPH_DEB_PKG_PATTERN}" '$0~pattern {print $2"="$3}') 2>/dev/null \
|| error_message "Can't download Ceph related packages (pattern: ${CEPH_DEB_PKG_PATTERN})." 13
debug_message "Backup Ceph deb files in version: ${CEPH_VERSION}"
tar cf "${BKP_TAR_PATH}" ./*.deb > /dev/null 2>&1 \
|| error_message "Error with creation of ${BKP_TAR_PATH} archive file." 14
## Remove deb files
rm --force -- *.deb \
|| error_message "Can't delete temp deb files." 15
cd - > /dev/null \
|| error_message "Can't cd to previous directory (before ${CEPH_DEB_PKG_DIR})" 16
## Remove temp directory
rmdir -- "${CEPH_DEB_PKG_DIR}" \
|| error_message "Can't delete temp directory (${CEPH_DEB_PKG_DIR})" 17
}
# }}}
# Manage arguments # {{{
# This code can't be in a function due to argument management
if [ ! "${NBARGS}" -eq "0" ]; then
manage_arg="0"
## If the first argument is not an option
if ! printf -- '%s' "${1}" | grep -q -E -- "^-+";
then
## Print help message and exit
printf '%b\n' "${RED}Invalid option: ${1}${RESET}"
printf '%b\n' "---"
usage
exit 1
fi
# Parse all options (start with a "-") one by one
while printf -- '%s' "${1}" | grep -q -E -- "^-+"; do
case "${1}" in
-d|--dir|--directory|--backup-dir ) ## Define BKP_DIR
## Move to the next argument
shift
## Define var
readonly BKP_DIR="${1}"
;;
--debug ) ## debug
DEBUG=0
;;
--help ) ## help
usage
## Exit after help informations
exit 0
;;
* ) ## unknow option
printf '%b\n' "${RED}Invalid option: ${1}${RESET}"
printf '%b\n' "---"
usage
exit 1
;;
esac
debug_message "Arguments management \
${RED}${1}${COLOR_DEBUG} option managed."
## Move to the next argument
shift
manage_arg=$((manage_arg+1))
done
debug_message "Arguments management \
${RED}${manage_arg}${COLOR_DEBUG} argument(s) successfully managed."
else
debug_message "Arguments management \
No arguments/options to manage."
fi
# }}}
main
exit 0