forked from extern/zfs-auto-snapshot
Merge pull request #30 from mbaynton/remove-only
--destroy-only switch, --{pre,post} fixes
This commit is contained in:
Darik Horn
commit
a0df1ebcc1
@ -64,14 +64,26 @@ Snapshot named filesystem and all descendants.
|
||||
\fB\-v\fR, \fB\-\-verbose\fR
|
||||
Print info messages.
|
||||
.TP
|
||||
\fB\-\-pre-snapshot\fR
|
||||
Command to run before snapshotting. It is passed the
|
||||
filesystem and snapshot name. If it returns non-zero,
|
||||
snapshotting this filesystem is aborted.
|
||||
\fB\-\-pre-snapshot\fR=\fICOMMAND\fR
|
||||
Command to run before each dataset is snapshotted.
|
||||
It is passed the dataset and snapshot name. If it
|
||||
returns non-zero, snapshotting this dataset is
|
||||
aborted.
|
||||
.TP
|
||||
\fB\-\-post-snapshot\fR
|
||||
Command to run after snapshotting. It is passed the
|
||||
filesystem and snapshot name.
|
||||
\fB\-\-post-snapshot\fR=\fICOMMAND\fR
|
||||
Command to run after each dataset is snapshotted.
|
||||
It is passed the dataset and snapshot name.
|
||||
.TP
|
||||
\fB\-\-destroy-only\fR
|
||||
Do not create new snapshots, but do destroy older
|
||||
snapshots. Has no effect unless used with \fB\-k\fR.
|
||||
.IP
|
||||
A non-obvious use may be constructon of cron jobs or
|
||||
scripts that run pre-snapshot command(s), then run
|
||||
zfs-auto-snapshot (without \fB\-k\fR) to quickly
|
||||
snapshot all datasets, then run post-snapshot
|
||||
command(s) and clean up with zfs-auto-snapshot
|
||||
\fB\-\-destroy-only\fR.
|
||||
.TP
|
||||
name
|
||||
Filesystem and volume names, or '//' for all ZFS datasets.
|
||||
|
||||
@ -41,6 +41,7 @@ opt_skip_scrub=''
|
||||
opt_verbose=''
|
||||
opt_pre_snapshot=''
|
||||
opt_post_snapshot=''
|
||||
opt_do_snapshots=1
|
||||
|
||||
# Global summary statistics.
|
||||
DESTRUCTION_COUNT='0'
|
||||
@ -71,6 +72,7 @@ print_usage ()
|
||||
-g, --syslog Write messages into the system log.
|
||||
-r, --recursive Snapshot named filesystem and all descendants.
|
||||
-v, --verbose Print info messages.
|
||||
--destroy-only Only destroy older snapshots, do not create new ones.
|
||||
name Filesystem and volume names, or '//' for all ZFS datasets.
|
||||
"
|
||||
}
|
||||
@ -150,6 +152,7 @@ do_snapshots () # properties, flags, snapname, oldglob, [targets...]
|
||||
local GLOB="$4"
|
||||
local TARGETS="$5"
|
||||
local KEEP=''
|
||||
local RUNSNAP=1
|
||||
|
||||
# global DESTRUCTION_COUNT
|
||||
# global SNAPSHOT_COUNT
|
||||
@ -158,15 +161,21 @@ do_snapshots () # properties, flags, snapname, oldglob, [targets...]
|
||||
|
||||
for ii in $TARGETS
|
||||
do
|
||||
do_run "$opt_pre_snapshot $ii $NAME"
|
||||
if [ $? -eq 0 ] && do_run "zfs snapshot $PROPS $FLAGS '$ii@$NAME'"
|
||||
if [ -n "$opt_do_snapshots" ]
|
||||
then
|
||||
do_run "$opt_post_snapshot $ii $NAME"
|
||||
if [ "$opt_pre_snapshot" != "" ]
|
||||
then
|
||||
do_run "$opt_pre_snapshot $ii $NAME" || RUNSNAP=0
|
||||
fi
|
||||
if [ $RUNSNAP -eq 1 ] && do_run "zfs snapshot $PROPS $FLAGS '$ii@$NAME'"
|
||||
then
|
||||
[ "$opt_post_snapshot" != "" ] && do_run "$opt_post_snapshot $ii $NAME"
|
||||
SNAPSHOT_COUNT=$(( $SNAPSHOT_COUNT + 1 ))
|
||||
else
|
||||
WARNING_COUNT=$(( $WARNING_COUNT + 1 ))
|
||||
continue
|
||||
fi
|
||||
fi
|
||||
|
||||
# Retain at most $opt_keep number of old snapshots of this filesystem,
|
||||
# including the one that was just recently created.
|
||||
@ -202,7 +211,7 @@ GETOPT=$(getopt \
|
||||
--longoptions=default-exclude,dry-run,fast,skip-scrub,recursive \
|
||||
--longoptions=event:,keep:,label:,prefix:,sep: \
|
||||
--longoptions=debug,help,quiet,syslog,verbose \
|
||||
--longoptions=pre-snapshot:,post-snapshot: \
|
||||
--longoptions=pre-snapshot:,post-snapshot:,destroy-only \
|
||||
--options=dnshe:l:k:p:rs:qgv \
|
||||
-- "$@" ) \
|
||||
|| exit 128
|
||||
@ -321,6 +330,10 @@ do
|
||||
opt_post_snapshot="$2"
|
||||
shift 2
|
||||
;;
|
||||
(--destroy-only)
|
||||
opt_do_snapshots=''
|
||||
shift 1
|
||||
;;
|
||||
(--)
|
||||
shift 1
|
||||
break
|
||||
@ -525,12 +538,29 @@ SNAPNAME="$opt_prefix${opt_label:+$opt_sep$opt_label}-$DATE"
|
||||
# The expression for matching old snapshots. -YYYY-MM-DD-HHMM
|
||||
SNAPGLOB="$opt_prefix${opt_label:+?$opt_label}????????????????"
|
||||
|
||||
test -n "$TARGETS_REGULAR" \
|
||||
if [ -n "$opt_do_snapshots" ]
|
||||
then
|
||||
test -n "$TARGETS_REGULAR" \
|
||||
&& print_log info "Doing regular snapshots of $TARGETS_REGULAR"
|
||||
|
||||
test -n "$TARGETS_RECURSIVE" \
|
||||
test -n "$TARGETS_RECURSIVE" \
|
||||
&& print_log info "Doing recursive snapshots of $TARGETS_RECURSIVE"
|
||||
|
||||
if test -n "$opt_keep" && [ "$opt_keep" -ge "1" ]
|
||||
then
|
||||
print_log info "Destroying all but the newest $opt_keep snapshots of each dataset."
|
||||
fi
|
||||
elif test -n "$opt_keep" && [ "$opt_keep" -ge "1" ]
|
||||
then
|
||||
test -n "$TARGETS_REGULAR" \
|
||||
&& print_log info "Destroying all but the newest $opt_keep snapshots of $TARGETS_REGULAR"
|
||||
|
||||
test -n "$TARGETS_RECURSIVE" \
|
||||
&& print_log info "Recursively destroying all but the newest $opt_keep snapshots of $TARGETS_RECURSIVE"
|
||||
else
|
||||
print_log notice "Only destroying snapshots, but count of snapshots to preserve not given. Nothing to do."
|
||||
fi
|
||||
|
||||
test -n "$opt_dry_run" \
|
||||
&& print_log info "Doing a dry run. Not running these commands..."
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user