186 lines
4.2 KiB
Bash
Executable File
186 lines
4.2 KiB
Bash
Executable File
#!/bin/sh
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# This script will backup /etc/pve content :
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# 1. Make a tar to /etc/proxmox.pve/backup/
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# This script can be call by a cronjob (eg. daily).
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# Vars {{{
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readonly PROGNAME=$(basename "${0}")
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readonly PROGDIR=$(readlink -m $(dirname "${0}"))
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readonly ARGS="${*}"
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readonly NBARGS="${#}"
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[ -z "${DEBUG}" ] && DEBUG=1
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readonly DEFAULT_LOCAL_BKP_DIR="/etc/proxmox.pve/backup"
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readonly TODAY_VAR=$(date +%Y%m%d)
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## Colors
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readonly PURPLE='\033[1;35m'
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readonly RED='\033[0;31m'
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readonly RESET='\033[0m'
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readonly COLOR_DEBUG="${PURPLE}"
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# }}}
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usage() { # {{{
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cat <<- EOF
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usage: $PROGNAME [-d|-h|-l]
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Backup /etc/pve content
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EXAMPLES :
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- Backup /etc/pve content to ${DEFAULT_LOCAL_BKP_DIR} directory
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${PROGNAME}
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OPTIONS :
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-d,--debug
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Enable debug messages.
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-h,--help
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Print this help message.
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-l,--local
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Path to a local directory to store backup and override
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default path (${DEFAULT_LOCAL_BKP_DIR}).
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EOF
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}
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# }}}
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debug_message() { # {{{
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local_message="${1}"
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## Print message if DEBUG is enable (=0)
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6b\e[m\n' "DEBUG − ${PROGNAME} : ${local_message}"
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return 0
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}
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# }}}
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define_vars() { # {{{
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## If local_bkp_dir wasn't defined {{{
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if [ -z "${local_bkp_dir}" ]; then
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## Use default path to store backup
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local_bkp_dir="${DEFAULT_LOCAL_BKP_DIR}"
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fi
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## }}}
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}
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# }}}
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is_directory_absent() { # {{{
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local_directory_absent="${1}"
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## Directory exists by default
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return_is_directory_absent="1"
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### Check if the directory exists
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# shellcheck disable=SC2086
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if test -d "${local_directory_absent}"; then
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return_is_directory_absent="1"
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debug_message "is_directory_absent − \
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The directory ${RED}${local_directory_absent}${COLOR_DEBUG} exists."
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else
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return_is_directory_absent="0"
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debug_message "is_directory_absent − \
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The directory ${RED}${local_directory_absent}${COLOR_DEBUG} doesn't exist."
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fi
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return "${return_is_directory_absent}"
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}
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# }}}
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main() { # {{{
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## Define all vars
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define_vars
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## Verify if the local destination directory is absent {{{
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### AND create it
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is_directory_absent "${local_bkp_dir}" \
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&& mkdir -p -- ${local_bkp_dir}
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## }}}
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## Create an archive of /etc/pve to $local_bkp_dir {{{
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### OR exit with error code 2 if it fails
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tar czf "${local_bkp_dir}/pve.${TODAY_VAR}.tar.gz" -C /etc/ pve/ \
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|| exit 2
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## }}}
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## Create an hard link to pve.latest.tar.gz {{{
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### OR exit with error code 3 if it fails
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ln -- "${local_bkp_dir}/pve.${TODAY_VAR}.tar.gz" "${local_bkp_dir}/pve.latest.tar.gz" \
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|| exit 3
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## }}}
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}
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# }}}
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# Manage arguments # {{{
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# This code can't be in a function due to argument management
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if [ ! "${NBARGS}" -eq "0" ]; then
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manage_arg="0"
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## If the first argument is not an option
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if ! printf -- '%s' "${1}" | grep -q -E -- "^-+";
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then
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## Print help message and exit
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printf '%b\n' "${RED}Invalid option: ${1}${RESET}"
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printf '%b\n' "---"
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usage
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exit 1
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fi
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# Parse all options (start with a "-") one by one
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while printf -- '%s' "${1}" | grep -q -E -- "^-+"; do
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case "${1}" in
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-d|--debug ) ## debug
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DEBUG=0
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;;
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-h|--help ) ## help
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usage
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## Exit after help informations
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exit 0
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;;
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-l|--local ) ## local directory to store backup
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## Move to the next argument
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shift
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## Define local_bkp_dir
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local_bkp_dir="${1}"
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;;
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* ) ## unknow option
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printf '%b\n' "${RED}Invalid option: ${1}${RESET}"
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printf '%b\n' "---"
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usage
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exit 1
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;;
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esac
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debug_message "Arguments management − \
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${RED}${1}${COLOR_DEBUG} option managed."
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## Move to the next argument
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shift
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manage_arg=$((manage_arg+1))
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done
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debug_message "Arguments management − \
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${RED}${manage_arg}${COLOR_DEBUG} argument(s) successfully managed."
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else
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debug_message "Arguments management − \
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No arguments/options to manage."
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fi
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# }}}
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main
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exit 255
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