From 1397c9c127c80716a864533cf074b5cf9b93f0b0 Mon Sep 17 00:00:00 2001
From: Otho <otho@othoulrich.com>
Date: Mon, 16 Jan 2023 19:19:06 -0500
Subject: [PATCH] Added remote zfs option.

---
 backup.sh | 46 +++++++++++++++++++++++++++++-----------------
 1 file changed, 29 insertions(+), 17 deletions(-)

diff --git a/backup.sh b/backup.sh
index 9b87220..e30ea7c 100755
--- a/backup.sh
+++ b/backup.sh
@@ -9,9 +9,9 @@ nodes_file="nodes.txt"
 
 datasets_file="datasets.txt"
 ### datasets.txt
-# <dataset 1>
-# <dataset 2>
-# <dataset 3>
+# <dataset 1> [remote dataset]
+# <dataset 2> [remote dataset]
+# <dataset 3> [remote dataset]
 # ...
 
 if [ ! -f $nodes_file ]; then echo "No nodes specified."; exit 2; fi
@@ -40,12 +40,14 @@ while read dataset dataset_options; do
 
     snapshot_dataset="yes"
     send_dataset="yes"
-    case $dataset_options in 
-        *"nosnap"* ) snapshot_dataset="";;
-    esac
-    case $dataset_options in 
-        *"nosend"* ) send_dataset="";;
-    esac
+    for option in $dataset_options; do
+        case $option in 
+            *"nosnap"*    ) snapshot_dataset=""                    ;;
+            *"nosend"*    ) send_dataset=""                        ;;
+            *"remotezfs="*) remotezfs=`echo $option|cut -d'=' -f2` ;
+                            dataset="$dataset:$remotezfs"          ;;
+        esac
+    done
 
     if [ $send_dataset ]; then
         SEND_DATASETS="$SEND_DATASETS $dataset"
@@ -58,6 +60,7 @@ done < datasets.txt
 list_datasets()
 {
     for dataset in $SEND_DATASETS; do
+        dataset=`echo $dataset|cut -d':' -f1`
         zfs list -H $dataset
     done
 }
@@ -73,13 +76,15 @@ list_remote_datasets() {
         fi
         if [ $BG_TEST_MODE = "TRUE" ]; then
             echo ssh $SSH_SEND_OPTS -o port=$ssh_port $user@$addr\
-                "sh -c 'for dataset in $SEND_DATASETS;
-                    do zfs list -H $zroot\$dataset;
+                "sh -c 'for dataset in $SEND_DATASETS; do
+                    dataset=`echo \\$dataset|cut -d':' -f2`
+                    zfs list -H $zroot\$dataset;
                 done'"
         else
             ssh $SSH_SEND_OPTS -o port=$ssh_port $user@$addr \
-                "sh -c 'for dataset in $SEND_DATASETS;
-                    do zfs list -H $zroot\$dataset;
+                "sh -c 'for dataset in $SEND_DATASETS; do
+                        dataset=`echo \\$dataset|cut -d':' -f2`
+                        zfs list -H $zroot\$dataset;
                 done';"
         fi
     done < sendnodes.tmp
@@ -106,6 +111,7 @@ get_latest_remote_snapshot()
 zfs_allow_origin()
 {
     for dataset in $SEND_DATASETS; do
+        dataset=`echo $dataset|cut -d':' -f1`
         if [ $BG_TEST_MODE = "TRUE" ]; then
             echo zfs allow -u $LOCAL_USER $ORIGIN_PERMS $dataset
         else
@@ -127,11 +133,13 @@ zfs_allow_mirrors()
         if [ $BG_TEST_MODE = "TRUE" ]; then
             echo ssh $SSH_SEND_OPTS -o port=$ssh_port $user@$addr \
                 "for dataset in $SEND_DATASETS; do
+                    dataset=`echo \\$dataset|cut -d':' -f2`
                     zfs allow -u $user $MIRROR_PERMS $zroot\$dataset
                 done"
         else
             ssh $SSH_SEND_OPTS -o port=$ssh_port $user@$addr \
                 "for dataset in $SEND_DATASETS; do
+                    dataset=`echo \\$dataset|cut -d':' -f2`
                     zfs allow -u $user $MIRROR_PERMS $zroot\$dataset
                 done"
         fi
@@ -161,18 +169,20 @@ send_latest()
             esac
         fi
         for dataset in $SEND_DATASETS; do
+            dataset=`echo $dataset|cut -d':' -f1`
+            remote_dataset=`echo $dataset|cut -d':' -f2`
             origin_snapshot=`get_latest_snapshot $dataset`
             if [ $BG_TEST_MODE = "TRUE" ]; then
                 echo zfs send $ZFS_SEND_OPTS $dataset@$origin_snapshot  \| \
                     pv -qL $BANDWIDTH_LIMIT                             \| \
                         ssh $SSH_SEND_OPTS -o port=$ssh_port $user@$addr \
-                            zfs recv $ZFS_RECV_OPTS $zroot$dataset
+                            zfs recv $ZFS_RECV_OPTS $zroot$remote_dataset
             else
                 zfs send $ZFS_SEND_OPTS $dataset@$origin_snapshot |
                     pv -qL $BANDWIDTH_LIMIT |
                         ssh $SSH_SEND_OPTS -o port=$ssh_port \
                             $user@$addr                            \
-                                zfs recv $ZFS_RECV_OPTS $zroot$dataset
+                                zfs recv $ZFS_RECV_OPTS $zroot$remote_dataset
             fi
         done
     done < sendnodes.tmp
@@ -189,6 +199,8 @@ send_increment()
             esac
         fi
         for dataset in $SEND_DATASETS; do
+            dataset=`echo $dataset|cut -d':' -f1`
+            remote_dataset=`echo $dataset|cut -d':' -f2`
             origin_snapshot=`get_latest_snapshot`
             remote_snapshot=`get_latest_remote_snapshot`
             if [ $BG_TEST_MODE = "TRUE" ]; then
@@ -197,14 +209,14 @@ send_increment()
                     $dataset@$origin_snapshot    \| \
                         pv -qL $BANDWIDTH_LIMIT \| \
                             ssh $SSH_SEND_OPTS -o port=$ssh_port $user@$addr  \
-                                zfs recv $ZFS_RECV_OPTS $zroot$dataset
+                                zfs recv $ZFS_RECV_OPTS $zroot$remote_dataset
             else
                 zfs send $ZFS_SEND_OPTS          \
                     -i $dataset@$remote_snapshot \
                     $dataset@$origin_snapshot    | 
                         pv -qL $BANDWIDTH_LIMIT |
                             ssh $SSH_SEND_OPTS -o port=$ssh_port $user@$addr  \
-                                zfs recv $ZFS_RECV_OPTS $zroot$dataset
+                                zfs recv $ZFS_RECV_OPTS $zroot$remote_dataset
             fi
         done
     done < sendnodes.tmp