Add zfSnap script from the legacy branch of the github project:
https://github.com/zfsnap/zfsnap/tree/legacy Usefull to take snapshot with Timestamp and TTL
This commit is contained in:
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#!/bin/sh
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# "THE BEER-WARE LICENSE":
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# <graudeejs@yandex.com> wrote this file. As long as you retain this notice you
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# can do whatever you want with this stuff. If we meet some day, and you think
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# this stuff is worth it, you can buy me a beer in return. Aldis Berjoza
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# wiki: https://github.com/graudeejs/zfSnap/wiki
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# repository: https://github.com/graudeejs/zfSnap
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# Bug tracking: https://github.com/graudeejs/zfSnap/issues
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readonly VERSION=1.11.1
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# commands
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ESED='sed -E'
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zfs_cmd='/sbin/zfs'
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zpool_cmd='/sbin/zpool'
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# global variables
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readonly ttl_pattern="([0-9]+y)?([0-9]+m)?([0-9]+w)?([0-9]+d)?([0-9]+h)?([0-9]+M)?([0-9]+[s])?"
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test_mode="${test_mode:-false}" # When set to "true", Exit won't really exit
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# Exit program with given status code
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Exit() {
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IsTrue $test_mode || exit $1
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}
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Note() {
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echo "NOTE: $*" > /dev/stderr
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}
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Err() {
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echo "ERROR: $*" > /dev/stderr
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}
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Fatal() {
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echo "FATAL: $*" > /dev/stderr
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exit 1
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}
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Warn() {
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echo "WARNING: $*" > /dev/stderr
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}
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readonly OS=`uname`
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case $OS in
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'FreeBSD')
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;;
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'SunOS')
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ESED='sed -r'
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if [ -d "/usr/gnu/bin" ]; then
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export PATH="/usr/gnu/bin:$PATH"
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else
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Fatal "GNU bin direcotry not found"
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fi
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;;
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'Linux')
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ESED='sed -r'
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;;
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'Darwin')
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zfs_cmd='/usr/sbin/zfs'
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zpool_cmd='/usr/sbin/zpool'
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;;
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*)
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Fatal "Your OS isn't supported"
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;;
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esac
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# Returns 0 if argument is "true"
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IsTrue() {
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case "$1" in
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true)
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return 0
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;;
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false)
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return 1
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;;
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*)
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Fatal "must be true or false"
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;;
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esac
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}
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# Returns 0 if argument is "false"
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IsFalse() {
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IsTrue "$1" && return 1 || return 0
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}
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# Converts seconds to TTL
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Seconds2TTL() {
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# convert seconds to human readable time
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xtime=$1
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years=$(($xtime / 31536000))
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xtime=$(($xtime % 31536000))
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[ ${years:-0} -gt 0 ] && years="${years}y" || years=""
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months=$(($xtime / 2592000))
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xtime=$(($xtime % 2592000))
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[ ${months:-0} -gt 0 ] && months="${months}m" || months=""
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days=$(($xtime / 86400))
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xtime=$(($xtime % 86400))
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[ ${days:-0} -gt 0 ] && days="${days}d" || days=""
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hours=$(($xtime / 3600))
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xtime=$(($xtime % 3600))
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[ ${hours:-0} -gt 0 ] && hours="${hours}h" || hours=""
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minutes=$(($xtime / 60))
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[ ${minutes:-0} -gt 0 ] && minutes="${minutes}M" || minutes=""
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seconds=$(($xtime % 60))
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[ ${seconds:-0} -gt 0 ] && seconds="${seconds}s" || seconds=""
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echo "${years}${months}${days}${hours}${minutes}${seconds}"
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}
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# Converts TTL to seconds
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TTL2Seconds() {
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# convert human readable time to seconds
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echo "$1" | sed -e 's/y/*31536000+/g; s/m/*2592000+/g; s/w/*604800+/g; s/d/*86400+/g; s/h/*3600+/g; s/M/*60+/g; s/s//g; s/\+$//' | bc -l
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}
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# Converts datetime to seconds
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Date2Timestamp() {
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case $OS in
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'FreeBSD' | 'Darwin' )
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date -j -f '%Y-%m-%d_%H.%M.%S' "$1" '+%s'
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;;
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*)
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date_normal="`echo $1 | $ESED -e 's/\./:/g; s/(20[0-9][0-9]-[01][0-9]-[0-3][0-9])_([0-2][0-9]:[0-5][0-9]:[0-5][0-9])/\1 \2/'`"
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date --date "$date_normal" '+%s'
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;;
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esac
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}
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# Check validity of TTL
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ValidTTL() {
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printf "$1" | grep -E "^${ttl_pattern}$" > /dev/null
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}
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Help() {
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cat << EOF
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${0##*/} v${VERSION} by Aldis Berjoza
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Syntax:
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${0##*/} [ generic options ] [ options ] zpool/filesystem ...
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GENERIC OPTIONS:
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-d = Delete old snapshots
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-e = Return number of failed actions as exit code.
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-F age = Force delete all snapshots exceeding age
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-n = Only show actions that would be performed
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-s = Don't do anything on pools running resilver
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-S = Don't do anything on pools running scrub
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-v = Verbose output
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-z = Force new snapshots to have 00 seconds!
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-zpool28fix = Workaround for zpool v28 zfs destroy -r bug
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OPTIONS:
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-a ttl = Set how long snapshot should be kept
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-D pool/fs = Delete all zfSnap snapshots of specific pool/fs (ignore ttl)
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-p prefix = Use prefix for snapshots after this switch
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-P = Don't use prefix for snapshots after this switch
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-r = Create recursive snapshots for all zfs file systems that
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follow this switch
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-R = Create non-recursive snapshots for all zfs file systems that
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follow this switch
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LINKS:
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wiki: https://github.com/graudeejs/zfSnap/wiki
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repository: https://github.com/graudeejs/zfSnap
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Bug tracking: https://github.com/graudeejs/zfSnap/issues
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EOF
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Exit 0
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}
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# Removes zfs snapshot
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RmZfsSnapshot() {
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if IsTrue $zpool28fix && [ "$1" = '-r' ]; then
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# get rid of '-r' parameter
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RmZfsSnapshot $2
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return
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fi
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if [ "$1" = '-r' ]; then
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SkipPool $2 || return 1
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else
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SkipPool $1 || return 1
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fi
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zfs_destroy="$zfs_cmd destroy $*"
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# hardening: make really, really sure we are deleting snapshot
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if echo $* | grep -q -e '@'; then
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if IsFalse $dry_run; then
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if $zfs_destroy > /dev/stderr; then
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IsTrue $verbose && echo "$zfs_destroy ... DONE"
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else
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IsTrue $verbose && echo "$zfs_destroy ... FAIL"
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IsTrue $count_failures && failures=$(($failures + 1))
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fi
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else
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echo "$zfs_destroy"
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fi
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else
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echo "FATAL: trying to delete zfs pool or filesystem? WTF?" > /dev/stderr
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echo " This is bug, we definitely don't want that." > /dev/stderr
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echo " Please report it to https://github.com/graudeejs/zfSnap/issues" > /dev/stderr
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echo " Don't panic, nothing was deleted :)" > /dev/stderr
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IsTrue $count_failures && [ $failures -gt 0 ] && Exit $failures
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Exit 1
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fi
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}
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# Returns 1 if zfs operations on given pool should be skipped
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SkipPool() {
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if IsTrue $scrub_skip; then
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for i in $scrub_pools; do
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if [ `echo $1 | sed -e 's#/.*$##; s/@.*//'` = $i ]; then
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IsTrue $verbose && Note "No action will be performed on '$1'. Scrub is running on pool."
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return 1
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fi
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done
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fi
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if IsTrue $resilver_skip; then
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for i in $resilver_pools; do
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if [ `echo $1 | sed -e 's#/.*$##; s/@.*//'` = $i ]; then
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IsTrue $verbose && Note "No action will be performed on '$1'. Resilver is running on pool."
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return 1
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fi
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done
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fi
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return 0
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}
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if IsFalse $test_mode; then
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[ $# = 0 ] && Help
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[ "$1" = '-h' -o $1 = "--help" ] && Help
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fi
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ttl='1m' # default snapshot ttl
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force_delete_snapshots_age=-1 # Delete snapshots older than x seconds. -1 means NO
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delete_snapshots="false" # Delete old snapshots?
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verbose="false" # Verbose output?
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dry_run="false" # Dry run?
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prefix="" # Default prefix
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prefixes="" # List of prefixes
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delete_specific_fs_snapshots="" # List of specific snapshots to delete
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delete_specific_fs_snapshots_recursively="" # List of specific snapshots to delete recursively
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zero_seconds="false" # Should new snapshots always have 00 seconds?
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scrub_pools="" # List of pools that are scrubbing
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resilver_pools="" # List of pools that are resilvering
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pools="" # List of pools
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get_pools="false" # Should I get list of pools?
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resilver_skip="false" # Should I skip pools that are resilvering?
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scrub_skip="false" # Should I skip pools that are scrubbing?
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failures=0 # Number of failed actions.
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count_failures="false" # Should I count failed actions?
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zpool28fix="false" # Workaround for zpool v28 zfs destroy -r bug
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while [ "$1" = '-d' -o "$1" = '-v' -o "$1" = '-n' -o "$1" = '-F' -o "$1" = '-z' -o "$1" = '-s' -o "$1" = '-S' -o "$1" = '-e' -o "$1" = '-zpool28fix' ]; do
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case "$1" in
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'-d')
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delete_snapshots="true"
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shift
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;;
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'-v')
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verbose="true"
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shift
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;;
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'-n')
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dry_run="true"
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shift
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;;
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'-F')
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force_delete_snapshots_age=`TTL2Seconds $2`
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shift 2
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;;
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'-z')
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zero_seconds="true"
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shift
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;;
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'-s')
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get_pools="true"
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resilver_skip="true"
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shift
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;;
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'-S')
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get_pools="true"
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scrub_skip="true"
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shift
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;;
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'-e')
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count_failures="true"
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shift
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;;
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'-zpool28fix')
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zpool28fix="true"
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shift
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;;
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esac
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done
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if IsTrue $get_pools; then
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pools=`$zpool_cmd list -H -o name`
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for i in $pools; do
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if IsTrue $resilver_skip; then
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$zpool_cmd status $i | grep -q -e 'resilver in progress' && resilver_pools="$resilver_pools $i"
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fi
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if IsTrue $scrub_skip; then
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$zpool_cmd status $i | grep -q -e 'scrub in progress' && scrub_pools="$scrub_pools $i"
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fi
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done
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fi
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readonly date_pattern='20[0-9][0-9]-[01][0-9]-[0-3][0-9]_[0-2][0-9]\.[0-5][0-9]\.[0-5][0-9]'
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if IsFalse $zero_seconds; then
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readonly tfrmt='%Y-%m-%d_%H.%M.%S'
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else
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readonly tfrmt='%Y-%m-%d_%H.%M.00'
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fi
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IsTrue $dry_run && zfs_list=`$zfs_cmd list -H -o name`
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ntime=`date "+$tfrmt"`
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while [ "$1" ]; do
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while [ "$1" = '-r' -o "$1" = '-R' -o "$1" = '-a' -o "$1" = '-p' -o "$1" = '-P' -o "$1" = '-D' ]; do
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case "$1" in
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'-r')
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zopt='-r'
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shift
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;;
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'-R')
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zopt=''
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shift
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;;
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'-a')
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ttl="$2"
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echo "$ttl" | grep -q -E -e "^[0-9]+$" && ttl=`Seconds2TTL $ttl`
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ValidTTL "$ttl" || Fatal "Invalid TTL: $ttl"
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shift 2
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;;
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'-p')
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prefix="$2"
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prefixes="$prefixes|$prefix"
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shift 2
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;;
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'-P')
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prefix=""
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shift
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;;
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'-D')
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if [ "$zopt" != '-r' ]; then
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delete_specific_fs_snapshots="$delete_specific_fs_snapshots $2"
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else
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delete_specific_fs_snapshots_recursively="$delete_specific_fs_snapshots_recursively $2"
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fi
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shift 2
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;;
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esac
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done
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# create snapshots
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if [ $1 ]; then
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if SkipPool $1; then
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if [ $1 = `echo $1 | $ESED -e 's/^-//'` ]; then
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zfs_snapshot="$zfs_cmd snapshot $zopt $1@${prefix}${ntime}--${ttl}"
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if IsFalse $dry_run; then
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if $zfs_snapshot > /dev/stderr; then
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IsTrue $verbose && echo "$zfs_snapshot ... DONE"
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else
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IsTrue $verbose && echo "$zfs_snapshot ... FAIL"
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IsTrue $count_failures && failures=$(($failures + 1))
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fi
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else
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printf "%s\n" $zfs_list | grep -m 1 -q -E -e "^$1$" \
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&& echo "$zfs_snapshot" \
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|| Err "Looks like zfs filesystem '$1' doesn't exist"
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fi
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else
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Warn "'$1' doesn't look like valid argument. Ignoring"
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fi
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fi
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shift
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fi
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done
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prefixes=`echo "$prefixes" | sed -e 's/^|//'`
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# delete snapshots
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if IsTrue $delete_snapshots || [ $force_delete_snapshots_age -ne -1 ]; then
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if IsFalse $zpool28fix; then
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zfs_snapshots=`$zfs_cmd list -H -o name -t snapshot | grep -E -e "^.*@(${prefixes})?${date_pattern}--${ttl_pattern}$" | sed -e 's#/.*@#@#'`
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else
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zfs_snapshots=`$zfs_cmd list -H -o name -t snapshot | grep -E -e "^.*@(${prefixes})?${date_pattern}--${ttl_pattern}$"`
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fi
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current_time=`date +%s`
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for i in `echo $zfs_snapshots | xargs printf "%s\n" | $ESED -e "s/^.*@//" | sort -u`; do
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create_time=$(Date2Timestamp `echo "$i" | $ESED -e "s/--${ttl_pattern}$//; s/^(${prefixes})?//"`)
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if IsTrue $delete_snapshots; then
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stay_time=$(TTL2Seconds `echo $i | $ESED -e "s/^(${prefixes})?${date_pattern}--//"`)
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[ $current_time -gt $(($create_time + $stay_time)) ] \
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&& rm_snapshot_pattern="$rm_snapshot_pattern $i"
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fi
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if [ "$force_delete_snapshots_age" -ne -1 ]; then
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[ $current_time -gt $(($create_time + $force_delete_snapshots_age)) ] \
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&& rm_snapshot_pattern="$rm_snapshot_pattern $i"
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fi
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done
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if [ "$rm_snapshot_pattern" != '' ]; then
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rm_snapshots=$(echo $zfs_snapshots | xargs printf '%s\n' | grep -E -e "@`echo $rm_snapshot_pattern | sed -e 's/ /|/g'`" | sort -u)
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for i in $rm_snapshots; do
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RmZfsSnapshot -r $i
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done
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fi
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fi
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# delete all snapshots
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if [ "$delete_specific_fs_snapshots" != '' ]; then
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rm_snapshots=`$zfs_cmd list -H -o name -t snapshot | grep -E -e "^($(echo "$delete_specific_fs_snapshots" | tr ' ' '|'))@(${prefixes})?${date_pattern}--${ttl_pattern}$"`
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for i in $rm_snapshots; do
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RmZfsSnapshot $i
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done
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fi
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if [ "$delete_specific_fs_snapshots_recursively" != '' ]; then
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rm_snapshots=`$zfs_cmd list -H -o name -t snapshot | grep -E -e "^($(echo "$delete_specific_fs_snapshots_recursively" | tr ' ' '|'))@(${prefixes})?${date_pattern}--${ttl_pattern}$"`
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for i in $rm_snapshots; do
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RmZfsSnapshot -r $i
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done
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fi
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IsTrue $count_failures && Exit $failures
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Exit 0
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# vim: set ts=4 sw=4 expandtab:
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