remote_fs=$2
remote_pool=${2%%/*}
+# return non-zero exit code if any command in the pipe fails
+set -o pipefail
+
+# get the backup pool from the command line or the config file if not specified
+if [[ -n $3 ]]; then
+ backup_pool=$3
+else
+ backup_pool=${backup_pool%% *} # use the first backup pool if none specified
+fi
+
# Setup our cleanup and exit trap
cleanup() {
if [[ -e "$local_list" ]]; 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
$zfs list -H -t snapshot |
grep ^${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" $mailto
fi
# List the snapshots on the local machine.
grep ^${backup_pool}/${remote_fs}@ |
grep -v ^${backup_pool}/${current_backup_marker} |
awk "{gsub(/^$backup_pool./,\"\",\$1); print\$1}" > $local_list
-if [ $? != 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.
# backup was interrupted for some reason. If we don't do this, the zfs send -R command
# below may complain about snaps already existing as it tries to resend from the
# previous backup marker again from a previously interrupted replicate.
- $zfs rollback -r ${backup_pool}/${previous_backup_marker}
+ $zfs rollback -rf ${backup_pool}/${previous_backup_marker}
if [ $? != 0 ]; then
- fatal_and_exit "-E- remote incremental $zfs rollback command failed on $hostname" $mailto
+ sleep 120
+ $zfs rollback -rf ${backup_pool}/${previous_backup_marker}
+ if [ $? != 0 ]; then
+ 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 -R -I${previous_backup_marker} ${current_backup_marker}"
+ replicate "$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" $mailto
fi
else
# We didn't find any backup markers, next check to see if we have a common snapshot.
if [[ -n "$common" ]]; then
# We found a common snapshot, incrementally send the new snaps
- replicate "$zfs send -R -I${common/*@/@} ${current_backup_marker}"
+ replicate "$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
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" $mailto
fi
else
echo "-W- We need to destroy a local filesystem before receiving a full stream."
fi
fi
# Send the full filesystem
- replicate "$zfs send -R ${current_backup_marker}"
+ replicate "$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
# don't check the return codes here because these may not exist, and that is ok
$zfs destroy ${backup_pool}/${previous_backup_marker} > /dev/null 2>&1
$ssh $remote $zfs destroy ${previous_backup_marker} > /dev/null 2>&1
+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
projects / zfs-ubuntu / .git / blobdiff