# HG changeset patch
# User Tomas Zeman <tzeman@volny.cz>
# Date 1306135932 -7200
# Node ID 1de92b1b5cf3fb9a9e894df61ad4300914a5d1e2
# Parent  28f1b26621eb31a86814d2bd36247a90469d1968
zfs/zynk: ZFS replication script

diff -r 28f1b26621eb -r 1de92b1b5cf3 zfs/zynk
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/zfs/zynk	Mon May 23 09:32:12 2011 +0200
@@ -0,0 +1,55 @@
+#!/bin/sh -e
+# Based on: http://www.cuddletech.com/blog/pivot/entry.php?id=989
+#
+# This script differs from original Zynk that uses -R and destination dataset,
+# not filesystem.
+#
+## ZYNK: The Zuper Zimple ZFS Sync (Replication) Tool
+## Form: zynk local/dataset root@remote.host destination/dataset
+
+# Please note: The reason this is so simple is because there is no error
+# checking, reporting, or cleanup.
+#
+# In the event that something goes wonkey, you'll manually need to fix the
+# snapshots and modify or remove the run datafile which contains the most
+# recent snapshot name.
+#
+# Furthermore, this absolutely relies on the GNU version of 'date' in order to
+# get epoch time.
+#
+# Before using, make sure you've:
+#   1. distributed your SSH key to the remote host and can ssh without
+#      password;
+#   2. delegated zfs rights to the user performing zynk.
+#
+
+if [ -z "$3" ]; then
+        echo "Usage: zynk local/dataset remote.host destination/dataset"
+        exit 1
+fi
+
+DATE=`date +%s`
+if [ "$DATE" = "%s" ]; then
+        echo "Must use GNU Date, please install and modify script."
+        exit 2
+fi
+
+LOCALFS=$1
+HOST=$2
+REMOTEFS=$3
+RUNF=`echo $LOCALFS-$HOST-$REMOTEFS|sed -e 's{[@/]{-{g'`
+CUR=`date '+%F-%H%M'`
+
+TYPE="Full"
+SEND_OPTS=""
+
+if [ -e $RUNF ]; then
+	TYPE="Incremental"
+	SEND_OPTS="-i $LOCALFS@`cat $RUNF`"
+fi
+
+echo "$TYPE started at `date`"
+zfs snapshot -r $LOCALFS@$CUR
+zfs send -v -R $SEND_OPTS $LOCALFS@$CUR | ssh $HOST zfs recv -F -d $REMOTEFS
+echo $CUR > $RUNF
+echo "$TYPE complete at `date`"