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zfs-backup
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will now send raw streams of encrypted data [closes #3]

This commit is contained in:
Tamás Gérczei 2019-08-08 09:14:54 +02:00
parent 2e8b4d8387
commit d9a92e62c4
1 changed files with 25 additions and 4 deletions
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29
zfs-backup.sh
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@ -82,6 +82,18 @@ function backup() {
# take a snapshot
/usr/sbin/zfs snapshot -r ${NEWSNAP}
# check if source is encrypted
if [ $ENCRYPTION_FEATURE != "disabled" ]
then
# encryption feature available
ENCRYPTION=$(/usr/sbin/zfs get -Ho value encryption ${DATASET})
if [[ ${ENCRYPTION} != "off" ]]
then
# encryption in use, send raw stream
RAW_MOD="w"
fi
fi
# determine whether to do differential send or not
if [ ! -z ${LASTSNAP} ]
then
@ -95,7 +107,7 @@ function backup() {
R_SNAPMODIFIER="I $(dirname ${DATASET})/$(basename ${R_SNAPSHOTS[*]:(-1)})"
fi
# send any previous snapshots
/usr/sbin/zfs send -R${R_SNAPMODIFIER} ${LASTSNAP} | ${RMOD} /usr/sbin/zfs recv -Feuv ${SAVETO} 2>&1 >> ${LOGFILE}
/usr/sbin/zfs send -R${RAW_MOD}${R_SNAPMODIFIER} ${LASTSNAP} | ${RMOD} /usr/sbin/zfs recv -Feuv ${SAVETO} 2>&1 >> ${LOGFILE}
}
else
# ensure this does not remain in effect
@ -103,7 +115,7 @@ function backup() {
fi
# send backup
/usr/sbin/zfs send -R${SNAPMODIFIER} ${NEWSNAP} | ${RMOD} /usr/sbin/zfs recv -Feuv ${SAVETO} 2>&1 >> ${LOGFILE}
/usr/sbin/zfs send -R${RAW_MOD}${SNAPMODIFIER} ${NEWSNAP} | ${RMOD} /usr/sbin/zfs recv -Feuv ${SAVETO} 2>&1 >> ${LOGFILE}
# if replication is unsuccessful, omit the aging check so as to prevent data loss
if [ $? -eq 0 ]
@ -162,7 +174,7 @@ function backup() {
done
# reset remote configuration
unset R_RMOD RMOD
unset R_RMOD RMOD RAW_MOD
}
#### END FUNCTIONS ####
@ -173,7 +185,7 @@ while getopts hf:m: OPTION
do
case "$OPTION" in
f)
# configuration file for install mode
# configuration file
CFGFILE="$OPTARG"
;;
@ -211,6 +223,15 @@ if [[ "$PLATFORM_VERSION" =~ ^joyent ]]
then
# SmartOS GZ has GNU date shipped by default but no perl interpreter on-board
TIMECMD="\$(date +%s)"
# determine pool name
POOL_NAME=$(/usr/bin/sysinfo | /usr/bin/json Zpool)
ENCRYPTION_FEATURE=$(/usr/sbin/zpool get -Ho value feature@encryption ${POOL_NAME})
if [ $? -ne 0 ]
then
# feature unknown, outdated PI
logger -t $(basename ${0%.sh}) -p user.notice "ZFS encryption is not supported on $PLATFORM_VERSION"
ENCRYPTION_FEATURE="disabled"
fi
fi
# determine current timestamp