Added new zfs lock checking script

[zfs-ubuntu/.git] / zfs-replicate

diff --git a/zfs-replicate b/zfs-replicate
index a5a3ad9653787db0fcd5798e5fccddc60c7082fc..cd38657fbf00f80f3b9d1d809b7ecf2eaa2fe4a8 100755 (executable)
--- a/zfs-replicate
+++ b/zfs-replicate
@@ -109,7 +109,7 @@ if [ $? != 0 ]; then
   echo >&2 "    Creating the local filesystem to receive the remote pool into: $backup_pool/$remote_pool"
   $zfs create $backup_pool/$remote_pool
   if [ $? != 0 ]; then
-    fatal_and_exit "-E- remote $zfs on $hostname create command failed" $mailto
+    fatal_and_exit "-E- remote $zfs on $hostname create $backup_pool/$remote_pool command failed" $mailto
   fi
 fi
 
@@ -158,8 +158,10 @@ $ssh $remote \
     $zfs list -H -t snapshot |
     grep ^${remote_fs}@ |
     awk '{print$1}' > $remote_list
-if [ $? != 0 ]; then
-  fatal_and_exit "-E- remote $zfs list on $hostname command failed" $mailto
+if [[ $? != 0 ]] && [[ $expect_empty_remote_list == 0 ]]; then
+  echo "-W- Unable to find $remote_fs on the remote host $hostname. Unable to proceed since the"
+  echo "    expect_empty_remote_list option has not been set to allow this, skipping replicate operation."
+  fatal_and_exit "-E- remote $zfs list on $hostname for $remote_fs command failed" $mailto
 fi
 
 # List the snapshots on the local machine.
@@ -170,23 +172,23 @@ $zfs list -H -t snapshot |
     grep ^${backup_pool}/${remote_fs}@ |
     grep -v ^${backup_pool}/${current_backup_marker} | 
     awk "{gsub(/^$backup_pool./,\"\",\$1); print\$1}" > $local_list
-if [[ $? != 0 ]] && [[ $expect_empty_remote_list == 0 ]]; then
-  fatal_and_exit "-E- local $zfs list on $hostname command failed" $mailto
-fi
+# If no local snapshots exist, we may need to send the entire filesystem, which we'll do later
+# So, no error check here as a non-zero return code means the local filesystem or snaps are missing
+# We'll catch this later on as a case where we need to send the entire filesystem
 
 # Destroy the current backup marker snapshot on the remote system if it exists
 grep -q ${current_backup_marker} $remote_list
 if [ $? == 0 ]; then
   $ssh $remote $zfs destroy ${current_backup_marker} 
   if [ $? != 0 ]; then
-    fatal_and_exit "-E- remote $zfs destroy on $hostname command failed" $mailto
+    fatal_and_exit "-E- remote $zfs destroy $current_backup_marker on $hostname command failed" $mailto
   fi
 fi
 
 # Create the current backup marker snapshot on the remote system
 $ssh $remote $zfs snapshot ${current_backup_marker}
 if [ $? != 0 ]; then
-  fatal_and_exit "-E- remote $zfs snapshot on $hostname command failed" $mailto
+  fatal_and_exit "-E- remote $zfs snapshot $current_backup_marker on $hostname command failed" $mailto
 fi
 
 # Check to see if the previous backup marker exists in the remote snapshot list.
@@ -211,13 +213,13 @@ if [ $no_markers == 0 ]; then
     sleep 120
     $zfs rollback -rf ${backup_pool}/${previous_backup_marker}
     if [ $? != 0 ]; then
-      fatal_and_exit "-E- remote incremental $zfs rollback command failed on $hostname" $mailto
+      fatal_and_exit "-E- remote incremental $zfs rollback $backup_pool/$previous_backup_marker command failed on $hostname" $mailto
     fi
   fi
   # Now it should be safe to send the snaps
   replicate "$zfs send -Rc -I${previous_backup_marker} ${current_backup_marker}"
   if [ $? != 0 ]; then
-    fatal_and_exit "-E- remote incremental $zfs send command failed on $hostname" $mailto
+    fatal_and_exit "-E- remote incremental $zfs send $previous_backup_marker command failed on $hostname" $mailto
   fi
 else
   # We didn't find any backup markers, next check to see if we have a common snapshot.
@@ -236,7 +238,7 @@ else
     # We found a common snapshot, incrementally send the new snaps
     replicate "$zfs send -Rc -I${common/*@/@} ${current_backup_marker}"
     if [ $? != 0 ]; then
-      fatal_and_exit "-E- remote incremental $zfs send command failed on $hostname" $mailto
+      fatal_and_exit "-E- remote incremental $zfs send $(common/*@/@) command failed on $hostname" $mailto
     fi
   else
     # We did not find any markers or a common snapshot
@@ -247,7 +249,7 @@ else
       if [[ $destroy_local_filesystem_on_full_replicate == 1 ]]; then
         $zfs destroy -r ${backup_pool}/${remote_fs}
         if [ $? != 0 ]; then
-          fatal_and_exit "-E- remote full $zfs destroy command failed on $hostname" $mailto
+          fatal_and_exit "-E- remote full $zfs destroy $backup_pool/$remote_fs command failed on $hostname" $mailto
         fi
       else
         echo "-W- We need to destroy a local filesystem before receiving a full stream."
@@ -258,7 +260,7 @@ else
     # Send the full filesystem
     replicate "$zfs send -Rc ${current_backup_marker}"
     if [ $? != 0 ]; then
-      fatal_and_exit "-E- remote full $zfs send command failed on $hostname" $mailto
+      fatal_and_exit "-E- remote full $zfs send $current_backup_marker command failed on $hostname" $mailto
     fi
   fi
 fi
@@ -272,9 +274,9 @@ sleep 1
 # Rename the current backup marker to be the previous backup marker
 $zfs rename ${backup_pool}/${current_backup_marker} ${backup_pool}/${previous_backup_marker}
 if [ $? != 0 ]; then
-  fatal_and_exit "-E- local $zfs rename command failed on $hostname" $mailto
+  fatal_and_exit "-E- local $zfs rename $backup_pool/$current_backup_marker command failed on $hostname" $mailto
 fi
 $ssh $remote $zfs rename ${current_backup_marker} ${previous_backup_marker}
 if [ $? != 0 ]; then
-  fatal_and_exit "-E- remote $zfs rename command failed on $hostname" $mailto
+  fatal_and_exit "-E- remote $zfs rename $current_backup_marker command failed on $hostname" $mailto
 fi