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123 lines
3.3 KiB
123 lines
3.3 KiB
#!/bin/bash -e |
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# defaults |
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HOURLY_DEL=25 |
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DAILY_DEL=8 |
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WEEKLY_DEL=5 |
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MONTHLY_DEL= |
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SOURCES=() |
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DESTINATION= |
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# overwrite defaults in configs |
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if test -e /etc/lizardfs-snapshots.conf; then |
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. /etc/lizardfs-snapshots.conf |
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fi |
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if test -e ~/.lizardfs-snapshots; then |
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. ~/.lizrdfs-snapshots |
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fi |
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# evaluate commandline |
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del= |
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periodity=${0%/*} |
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periodity=${periodity##*/} |
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if [[ $periodity =~ ^cron\... ]]; then |
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periodity=${periodity#cron} |
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else |
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periodity= |
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fi |
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case "$periodity" in |
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(.hourly) del=${HOURLY_DEL};; |
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(.daily) del=${DAILY_DEL};; |
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(.weekly) del=${WEEKLY_DEL};; |
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(.monthly) del=${MONTHLY_DEL};; |
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(*) periodity=".manual";; |
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esac |
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while test $# -gt 0; do |
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case "$1" in |
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(-h|--help) cat <<EOF |
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$0 [OPTIONS] [[SOURCES...] DESTINATION] |
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OPTIONS |
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-h, --help show this help |
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-n, --dry-run execute dry run, do not backup, just show commands |
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-d, --del <number> delete old snapshots beginning at <numbers>-th |
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CONFIGURATION FILE |
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You can have a configuration file lizardfs-snapshots.conf either in /etc or in your home. |
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This may define the following bash variables: |
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HOURLY_DEL, DAILY_DEL, WEEKLY_DEL, MONTHLY_DEL |
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defining the parameter --del for hourly, daily, weekly, monthly |
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SOURCES bash array that defines the sources to backup |
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DESTINATION snapshot target path |
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DESCRIPTION |
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To create regular snapshots on a daily base, just run: |
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sudo cp lizardfs-snapshots.sh /etc/cron.daily/lizardfs-snapshots |
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If lizardfs-snapshots is run from a cron.daily, cron.hourly, |
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cron. monthly or cron.weekly directory, the periodity is automatically |
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appended to the snapshot name, and the expiry is set meaningfull: |
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- hourly → keep only 24 hours, --del 25 |
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- daily → keep only 7 days, --del 8 |
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- weekly → keep only 4 weeks, --del 5 |
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- monthly → old snapshots are not deleted |
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EOF |
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exit;; |
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(-n|--dry-run) dryrun=1;; |
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(-d|--del) shift; del="$1";; |
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(*) break;; |
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esac |
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if test $# -lt 1; then |
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echo "ERROR: missing argument, try $0 --help" 1>&2 |
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exit 1 |
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fi |
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shift |
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done |
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while test $# -gt 1; do |
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SOURCES+=("$1") |
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shift |
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done |
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if test $# -eq 1; then |
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DESTINATION="$1" |
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fi |
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if test -z "${SOURCES[*]}"; then |
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echo "ERROR: no sources specified, try $0 --help" 1>&2 |
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exit 1 |
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fi |
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if test -z "${DESTINATION}"; then |
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echo "ERROR: no destination specified, try $0 --help" 1>&2 |
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exit 1 |
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fi |
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if $dryrun -eq 0 && ! ( test -d "${DESTINATION}" || mkdir -p "${DESTINATION}" ); then |
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echo "ERROR: cannot create destination path '$DESTINATION', try $0 --help" 1>&2 |
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exit 1 |
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fi |
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date="-$(date +%Y-%m-%d-%H-%M)" |
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for src in "${SOURCES[@]}"; do |
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target="${src##*/}${periodity}" |
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if test $dryrun -eq 1; then |
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echo -e "→ \e[1mbackup $src\e[0m" |
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echo " " "lizardfs snapshot '${src}' '${DESTINATION}/${target}${date}'" |
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if test -n "$del"; then |
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for f in $(ls -d1 "${DESTINATION}/${target}"-* | sort -r | tail -n +"$del"); do |
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echo " " "rm -rf '$f'" |
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done |
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fi |
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else |
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echo -e "→ \e[1mbackup $src\e[0m" |
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lizardfs snapshot "${src}" "${DESTINATION}/${target}${date}" |
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if test -n "$del"; then |
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for f in $(ls -d1 "${DESTINATION}/${target}"-* | sort -r | tail -n +"$del"); do |
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rm -rf "$f" |
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done |
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fi |
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fi |
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done
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