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ssh mode: add gpg encryption support

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This commit is contained in:
Kevin McCormick 2017-03-07 15:23:20 -08:00
parent 3bb83e8029
commit 28c7cbc747
1 changed files with 25 additions and 6 deletions
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31
backup-zfs
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@ -19,6 +19,7 @@ usage() {
-d dateopts options for date(1) - used to name the snapshots (default: +%F_%T)
-s store mode - output snaps from local fs to ssh server
-r read mode - read snaps from ssh server to local fs
-g gpg-id gpg recipient key id (store mode only)
EOF
exit $1
}
@ -73,7 +74,7 @@ fromssh=false
###
### parse options
###
while getopts "hvqk:t:d:sr" opt ; do
while getopts "hvqk:t:d:srg:" opt ; do
case $opt in
h) usage 0 ;;
v)
@ -87,12 +88,16 @@ while getopts "hvqk:t:d:sr" opt ; do
d) dateopts=$OPTARG ;;
s) tossh=true ;;
r) fromssh=true ;;
g) gpgid="$OPTARG" ;;
*) usage 1 ;;
esac
done
shift $((OPTIND-1))
date="$(date $dateopts)"
$tossh && $fromssh && die 1 "-s and -r are mutually exclusive"
if ! $tossh && [[ -n $gpgid ]] ; then
die 1 "-g can only be used with -s"
fi
###
### parse src & dest host/fs info
@ -155,9 +160,18 @@ if $tossh ; then
die 1 "no incremental path from from $src to $dest"
# normal case: send incremental
else
log "sending incremental snapshot from $src to $dest (${last#${tag}_}..${cur#*@${tag}_})"
log "sending $([[ -n $gpgid ]] && echo "encrypted ")incremental snapshot from $src to $dest (${last#${tag}_}..${cur#*@${tag}_})"
#ZFS "$srchost" send $send_opts -R -I "$last" "$cur" | ZFS "$desthost" receive $recv_opts -Fue "$destfs" || die $? "zfs incremental send failed"
ZFS "$srchost" send $send_opts -R -I "$last" "$cur" | ssh "$desthost" "cat > \"$destpath/${tag}_$date.zfssnap\"" || die $? "zfs incremental send failed"
if [[ -n $gpgid ]] ; then
ZFS "$srchost" send $send_opts -R -I "$last" "$cur" \
| gpg --trust-model always --encrypt --recipient "$gpgid" \
| ssh "$desthost" "cat > \"$destpath/${tag}_$date.zfssnap.gpg\"" \
|| die $? "zfs incremental send failed"
else
ZFS "$srchost" send $send_opts -R -I "$last" "$cur" \
| ssh "$desthost" "cat > \"$destpath/${tag}_$date.zfssnap\"" \
|| die $? "zfs incremental send failed"
fi
fi
exit
@ -184,13 +198,18 @@ elif $fromssh ; then
###
log "receiving incremental snapshot from $src to $dest"
#ZFS "$srchost" send $send_opts -R -I "$last" "$cur" | ZFS "$desthost" receive $recv_opts -Fue "$destfs" || die $? "zfs incremental send failed"
for file in $(ssh "$srchost" "find \"$srcpath\" -name \"*.zfssnap\"") ; do
ssh "$srchost" "cat \"$file\"" | ZFS "$desthost" receive $recv_opts -Fue "$dest" && ssh "$srchost" "rm \"$file\""
for file in $(ssh "$srchost" "find \"$srcpath\" -name \"*.zfssnap\" -o -name \"*.zfssnap.gpg\"") ; do
if [[ $file =~ \.gpg$ ]] ; then
ssh "$srchost" "cat \"$file\"" | gpg | ZFS "$desthost" receive $recv_opts -Fue "$dest" \
&& ssh "$srchost" "rm \"$file\""
else
ssh "$srchost" "cat \"$file\"" | ZFS "$desthost" receive $recv_opts -Fue "$dest" \
&& ssh "$srchost" "rm \"$file\""
fi
done
exit
fi
die 1 "neither -s nor -r was specified"
# discard anything before a colon to get the fs
srcfs="${src#*:}"