mirror of
https://github.com/zfsonlinux/zfs-auto-snapshot.git
synced 2024-11-07 08:44:15 +01:00
Merge branch 'topic/hanoi' of git://github.com/rdparker/zfs-auto-snapshot into hanoi
This commit is contained in:
Darik Horn
commit
e08ebdf884
@ -59,6 +59,10 @@ print_usage ()
|
||||
-n, --dry-run Print actions without actually doing anything.
|
||||
-s, --skip-scrub Do not snapshot filesystems in scrubbing pools.
|
||||
-h, --help Print this usage message.
|
||||
-H, --hanoi=INT Use the hanoi rotation scheme.
|
||||
INT how frequently the hanoi rotation is being run.
|
||||
It is a number followed by one of w, d, h, m, s for
|
||||
weeks, days, hours, minutes or seconds.
|
||||
-k, --keep=NUM Keep NUM recent snapshots and destroy older snapshots.
|
||||
-l, --label=LAB LAB is usually 'hourly', 'daily', or 'monthly'.
|
||||
-p, --prefix=PRE PRE is 'zfs-auto-snap' by default.
|
||||
@ -140,6 +144,123 @@ do_run () # [argv]
|
||||
}
|
||||
|
||||
|
||||
do_rotate () # flags, oldglob, target
|
||||
{
|
||||
local FLAGS="$1"
|
||||
local GLOB="$2"
|
||||
local TARGET="$3"
|
||||
local KEEP=''
|
||||
|
||||
# global DESTRUCTION_COUNT
|
||||
# global WARNING_COUNT
|
||||
# global SNAPSHOTS_OLD
|
||||
|
||||
# Retain at most $opt_keep number of old snapshots of this filesystem,
|
||||
# including the one that was just recently created.
|
||||
KEEP="$opt_keep"
|
||||
|
||||
# ASSERT: The old snapshot list is sorted by increasing age.
|
||||
for jj in $SNAPSHOTS_OLD
|
||||
do
|
||||
# Check whether this is an old snapshot of the filesystem.
|
||||
if [ -z "${jj#$TARGET@$GLOB}" ]
|
||||
then
|
||||
KEEP=$(( $KEEP - 1 ))
|
||||
if [ "$KEEP" -le '0' ]
|
||||
then
|
||||
if do_run "zfs destroy $FLAGS '$jj'"
|
||||
then
|
||||
DESTRUCTION_COUNT=$(( $DESTRUCTION_COUNT + 1 ))
|
||||
else
|
||||
WARNING_COUNT=$(( $WARNING_COUNT + 1 ))
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
done
|
||||
}
|
||||
|
||||
|
||||
compute_hanoi_level() # date
|
||||
{
|
||||
local DATE="$1"
|
||||
local EPOCH_TIME=''
|
||||
local HANOI_NUM=''
|
||||
local HANOI_LEVEL='1'
|
||||
|
||||
# The h* is because on Solaris %H%M will have generated 12h34
|
||||
EPOCH_TIME=$(date +%s --date="$(echo $DATE | sed 's/-\(..\)h*\(..\)$/ \1:\2/')")
|
||||
HANOI_NUM=$(($EPOCH_TIME / $opt_hanoi));
|
||||
while test "$HANOI_NUM" -ne "0"
|
||||
do
|
||||
case "${HANOI_NUM}" in
|
||||
(*[13579])
|
||||
break
|
||||
;;
|
||||
esac
|
||||
HANOI_LEVEL=$(($HANOI_LEVEL + 1))
|
||||
HANOI_NUM=$(($HANOI_NUM / 2))
|
||||
done
|
||||
echo $HANOI_LEVEL
|
||||
}
|
||||
|
||||
|
||||
do_hanoi () # flags, oldglob, target
|
||||
{
|
||||
local FLAGS="$1"
|
||||
local GLOB="$2"
|
||||
local TARGET="$3"
|
||||
local KEEP=''
|
||||
local HANOI_LEVEL='0'
|
||||
local SNAP_DATE=''
|
||||
local SNAP_LEVEL=''
|
||||
local POSSIBLY_DESTROY=''
|
||||
|
||||
# global DESTRUCTION_COUNT
|
||||
# global WARNING_COUNT
|
||||
# global SNAPSHOTS_OLD
|
||||
|
||||
HANOI_LEVEL=$(compute_hanoi_level "$DATE")
|
||||
|
||||
# Retain at most $opt_keep number of old snapshots of this filesystem,
|
||||
# including the one that was just recently created.
|
||||
KEEP="$opt_keep"
|
||||
|
||||
# ASSERT: The old snapshot list is sorted by increasing age.
|
||||
for jj in $SNAPSHOTS_OLD
|
||||
do
|
||||
# Check whether this is an old snapshot of the filesystem.
|
||||
if [ -z "${jj#$TARGET@$GLOB}" ]
|
||||
then
|
||||
# If younger snapshot was stored for possible
|
||||
# deletion, delete it.
|
||||
if [ -n "$POSSIBLY_DESTROY" ]
|
||||
then
|
||||
if do_run "zfs destroy $FLAGS '$POSSIBLY_DESTROY'"
|
||||
then
|
||||
DESTRUCTION_COUNT=$(( $DESTRUCTION_COUNT + 1 ))
|
||||
else
|
||||
WARNING_COUNT=$(( $WARNING_COUNT + 1 ))
|
||||
fi
|
||||
POSSIBLY_DESTROY=''
|
||||
fi
|
||||
|
||||
SNAP_DATE=$(echo $jj | sed 's/.*-\(....-..-..-..h*..\)$/\1/')
|
||||
SNAP_LEVEL=$(compute_hanoi_level "$SNAP_DATE")
|
||||
if test "$HANOI_LEVEL" -eq "$SNAP_LEVEL"
|
||||
then
|
||||
# By default the hanoi rotation scheme acts as
|
||||
# though there are an infinite number of
|
||||
# disks. So instead of immediately destroying
|
||||
# this snapshot, remember it as possibly
|
||||
# needing to be destroyed and only do so if an
|
||||
# older snapshot is found for this set.
|
||||
POSSIBLY_DESTROY="$jj"
|
||||
fi
|
||||
fi
|
||||
done
|
||||
}
|
||||
|
||||
|
||||
do_snapshots () # properties, flags, snapname, oldglob, [targets...]
|
||||
{
|
||||
local PROPS="$1"
|
||||
@ -147,12 +268,9 @@ do_snapshots () # properties, flags, snapname, oldglob, [targets...]
|
||||
local NAME="$3"
|
||||
local GLOB="$4"
|
||||
local TARGETS="$5"
|
||||
local KEEP=''
|
||||
|
||||
# global DESTRUCTION_COUNT
|
||||
# global SNAPSHOT_COUNT
|
||||
# global WARNING_COUNT
|
||||
# global SNAPSHOTS_OLD
|
||||
|
||||
for ii in $TARGETS
|
||||
do
|
||||
@ -164,29 +282,13 @@ do_snapshots () # properties, flags, snapname, oldglob, [targets...]
|
||||
continue
|
||||
fi
|
||||
|
||||
# Retain at most $opt_keep number of old snapshots of this filesystem,
|
||||
# including the one that was just recently created.
|
||||
test -z "$opt_keep" && continue
|
||||
KEEP="$opt_keep"
|
||||
|
||||
# ASSERT: The old snapshot list is sorted by increasing age.
|
||||
for jj in $SNAPSHOTS_OLD
|
||||
do
|
||||
# Check whether this is an old snapshot of the filesystem.
|
||||
if [ -z "${jj#$ii@$GLOB}" ]
|
||||
then
|
||||
KEEP=$(( $KEEP - 1 ))
|
||||
if [ "$KEEP" -le '0' ]
|
||||
then
|
||||
if do_run "zfs destroy $FLAGS '$jj'"
|
||||
then
|
||||
DESTRUCTION_COUNT=$(( $DESTRUCTION_COUNT + 1 ))
|
||||
else
|
||||
WARNING_COUNT=$(( $WARNING_COUNT + 1 ))
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
done
|
||||
if test -z "$opt_hanoi"
|
||||
then
|
||||
test -z "$opt_keep" && continue
|
||||
do_rotate "$FLAGS" "$GLOB" "$ii"
|
||||
else
|
||||
do_hanoi "$FLAGS" "$GLOB" "$ii"
|
||||
fi
|
||||
done
|
||||
}
|
||||
|
||||
@ -196,9 +298,9 @@ do_snapshots () # properties, flags, snapname, oldglob, [targets...]
|
||||
|
||||
GETOPT=$(getopt \
|
||||
--longoptions=default-exclude,dry-run,fast,skip-scrub,recursive \
|
||||
--longoptions=event:,keep:,label:,prefix:,sep: \
|
||||
--longoptions=event:,hanoi:,keep:,label:,prefix:,sep: \
|
||||
--longoptions=debug,help,quiet,syslog,verbose \
|
||||
--options=dnshe:l:k:p:rs:qgv \
|
||||
--options=dnshH:e:l:k:p:rs:qgv \
|
||||
-- "$@" ) \
|
||||
|| exit 128
|
||||
|
||||
@ -244,6 +346,29 @@ do
|
||||
print_usage
|
||||
exit 0
|
||||
;;
|
||||
(-H|--hanoi)
|
||||
HANOI_OPT="$2"
|
||||
MULT="";
|
||||
INT="";
|
||||
case "$2" in
|
||||
(*[0-9]s) MULT=1 ;;
|
||||
(*[0-9]m) MULT=60 ;;
|
||||
(*[0-9]h) MULT=3600 ;;
|
||||
(*[0-9]d) MULT=86400 ;;
|
||||
(*[0-9]w) MULT=604800 ;;
|
||||
(*)
|
||||
print_log error "Unrecognized interval $2 for the $1 parameter."
|
||||
exit 139
|
||||
;;
|
||||
esac
|
||||
INT=$(echo $2 | sed 's/.$//')
|
||||
if ! test "$INT" -gt '0' 2>/dev/null
|
||||
then
|
||||
print_log error "The $2 parameter must be a positive integer."
|
||||
fi
|
||||
opt_hanoi=$(($INT * $MULT))
|
||||
shift 2
|
||||
;;
|
||||
(-k|--keep)
|
||||
if ! test "$2" -gt '0' 2>/dev/null
|
||||
then
|
||||
@ -334,6 +459,11 @@ then
|
||||
exit 134
|
||||
fi
|
||||
|
||||
if test -n "$opt_hanoi" -a -z "$opt_label"
|
||||
then
|
||||
opt_label=hanoi
|
||||
fi
|
||||
|
||||
# These are the only times that `zpool status` or `zfs list` are invoked, so
|
||||
# this program for Linux has a much better runtime complexity than the similar
|
||||
# Solaris implementation.
|
||||
@ -498,14 +628,19 @@ do
|
||||
TARGETS_RECURSIVE="${TARGETS_RECURSIVE:+$TARGETS_RECURSIVE }$ii" # nb: \t
|
||||
done
|
||||
|
||||
# Linux lacks SMF and the notion of an FMRI event, but always set this property
|
||||
# because the SUNW program does. The dash character is the default.
|
||||
SNAPPROP="-o com.sun:auto-snapshot-desc='$opt_event'"
|
||||
|
||||
# ISO style date; fifteen characters: YYYY-MM-DD-HHMM
|
||||
# On Solaris %H%M expands to 12h34.
|
||||
DATE=$(date --utc +%F-%H%M)
|
||||
|
||||
if test -n "$opt_hanoi" -a "$opt_event" = "-"
|
||||
then
|
||||
opt_event=hanoi-$HANOI_OPT-level-$(compute_hanoi_level $DATE)
|
||||
fi
|
||||
|
||||
# Linux lacks SMF and the notion of an FMRI event, but always set this property
|
||||
# because the SUNW program does. The dash character is the default.
|
||||
SNAPPROP="-o com.sun:auto-snapshot-desc='$opt_event'"
|
||||
|
||||
# The snapshot name after the @ symbol.
|
||||
SNAPNAME="$opt_prefix${opt_label:+$opt_sep$opt_label}-$DATE"
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user