X-Git-Url: http://git.pippins.net/embedvideo/.git/static/git-logo.png?a=blobdiff_plain;f=zfs-replicate;h=c7e7c2faa191e30517683605a4258f3fd59608ee;hb=3f08d533f25120d1df5d607ab38d759b701e981b;hp=09cb3babb7600f0526a14b4b2c2f945f41660ea4;hpb=984d48e66a916fd9ba533ae19b43aafd449dad77;p=zfs-nexenta%2F.git

diff --git a/zfs-replicate b/zfs-replicate
index 09cb3ba..c7e7c2f 100755
--- a/zfs-replicate
+++ b/zfs-replicate
@@ -1,43 +1,73 @@
 #/bin/bash
 
+# Author: Carl Baldwin & Alan Pippin
+# Description: This script replicates a remote zfs filesystem to a local zfs pool.
+#              This script will keep all snapshots in sync, removing the ones
+#              that have been deleted since the last replicate was performed.
+#              This script will only send the new, or missing, snapshots since
+#              the last replicate was performed.
 # Usage: replicate <hostname> <zfs filesystem>
+
+# source our configuration
+config="${0%/*}/zfs-scripts.conf"
+[ -e "${config}.dist" ] && . ${config}.dist
+[ -e "${config}" ] && . ${config}
+
+# command line arg parsing
 remote=$1
 remote_fs=$2
 remote_pool=${2%%/*}
-remote_lockdir="/tmp/zfs-admin-lock"
-
-# Set the name of the local pool used to store the backup of the remote
-local_pool=backups
-
-# Set the email address to send notification to
-mailto=root@pippins.net
-
-# When this variable is set, local filesystems will be destroyed 
-# before receiving a full streams into them from the remote source.
-destroy_local_filesystem_on_full_replicate=0
-
-# The ssh connection doesn't find zfs without this.
-zfs=/usr/sbin/zfs
+hostname=`hostname`
 
 # Setup our cleanup and exit trap
 cleanup() {
-  ssh $remote rm -rf "$remote_lockdir"
-  exit
+  if [[ -e "$local_list" ]]; then
+    rm -f $local_list
+  fi
+  if [[ -e "$remote_list" ]]; then
+    rm -f $remote_list
+  fi
+  if [[ -n "$remote" ]]; then
+    ssh $remote ls -d "$lockdir" > /dev/null 2>&1
+    if [[ $? == 0 ]]; then
+      ssh $remote rm -rf "$lockdir"
+    fi
+  fi
 }
-trap cleanup INT
+fatal_and_exit() {
+  echo -e 2>&1 "$1"
+  # Destroy the backup markers on the local filesystem if they exist
+  if [[ -n "$current_backup_marker" ]]; then
+    zfs list -t snapshot ${local_pool}/${current_backup_marker} > /dev/null 2>&1
+    if [ $? == 0 ]; then
+      $zfs destroy ${local_pool}/${current_backup_marker}
+    fi
+  fi
+  if [[ -n "$previous_backup_marker" ]]; then
+    zfs list -t snapshot ${local_pool}/${previous_backup_marker} > /dev/null 2>&1 
+    if [ $? == 0 ]; then
+      $zfs destroy ${local_pool}/${previous_backup_marker}
+    fi
+  fi
+  # send email notification
+  if [[ -n "$2" ]]; then
+    echo -e "$1" | $mailx -s "zfs replicate on $hostname failed" "$2"
+  fi
+  # exit
+  exit 1
+}
+trap fatal_and_exit INT
 trap cleanup EXIT
 
 # Make sure we have valid arguments
 if [[ -z "$remote" ]] || [[ -z "$remote_fs" ]]; then
-  echo "Usage: $0 <hostname> <zfs filesystem>"
-  exit 1
+  fatal_and_exit "Usage: $0 <hostname> <zfs filesystem>"
 fi
 
 # Make sure the local pool and local receiving filesystem exist, or print some errors
 zpool list -H "$local_pool" >/dev/null 2>&1
 if [ $? != 0 ]; then
-  echo >&2 "-E- The local pool, '$local_pool' doesn't seem to exist."
-  exit 1
+  fatal_and_exit "-E- The local pool, '$local_pool' doesn't seem to exist." $mailto
 fi
 zfs list "$local_pool/$remote_pool" >/dev/null 2>&1
 if [ $? != 0 ]; then
@@ -45,8 +75,7 @@ if [ $? != 0 ]; then
   echo >&2 "    Creating the local filesystem to receive the remote pool into: $local_pool/$remote_pool"
   $zfs create $local_pool/$remote_pool
   if [ $? != 0 ]; then
-    echo "-E- remote $zfs create command failed"
-    exit 1
+    fatal_and_exit "-E- remote $zfs create command failed" $mailto
   fi
 fi
 
@@ -54,8 +83,7 @@ fi
 local_pool_guid=`zpool get guid $local_pool 2>&1 | grep $local_pool | awk '{ print $3 }'`
 zpool get guid $local_pool > /dev/null 2>&1
 if [ $? != 0 ]; then
-  echo >&2 "-E- Unable to extract the guid for the local pool: $local_pool"
-  exit 1
+  fatal_and_exit "-E- Unable to extract the guid for the local pool: $local_pool" $mailto
 fi
 
 # Turn on shell verbosity
@@ -67,7 +95,7 @@ maxsleeptime=60
 maxattempts=100
 attempts=0
 while true; do
-  ssh $remote mkdir "$remote_lockdir" >/dev/null 2>&1
+  ssh $remote mkdir "$lockdir" >/dev/null 2>&1
   if [ $? != 0 ]; then
     # Another zfs admin tool is running.
     # Wait a random amount of time and try again
@@ -80,9 +108,9 @@ while true; do
   fi
   if [[ $attempts -gt $maxattempts ]]; then
     # We've exceeded our maximum while loop count
-    echo "-W- The zfs filesystem has been locked down. Skipping replicate operation."
-    ssh $remote ls -ld $remote_lockdir | /usr/bin/mailx -s "zfs-replicate-all unable to obtain zfs admin lock" $mailto
-    exit 1
+    echo "-E- The zfs filesystem has been locked down. Skipping replicate operation."
+    fail_msg=`ssh $remote ls -ld $lockdir 2>&1`
+    fatal_and_exit "zfs-replicate-all unable to obtain zfs admin lock:\n$fail_msg" $mailto
   fi
 done
 
@@ -97,8 +125,7 @@ ssh $remote \
     grep ^${remote_fs}@ |
     awk '{print$1}' > $remote_list
 if [ $? != 0 ]; then
-  echo "-E- remote $zfs list command failed"
-  exit 1
+  fatal_and_exit "-E- remote $zfs list command failed" $mailto
 fi
 
 # List the snapshots on the local machine.
@@ -110,8 +137,7 @@ $zfs list -H -t snapshot |
     grep -v ^${local_pool}/${current_backup_marker} | 
     awk "{gsub(/^$local_pool./,\"\",\$1); print\$1}" > $local_list
 if [ $? != 0 ]; then
-  echo "-E- local $zfs list command failed"
-  exit 1
+  fatal_and_exit "-E- local $zfs list command failed" $mailto
 fi
 
 # Destroy the current backup marker snapshot on the remote system if it exists
@@ -119,16 +145,14 @@ grep -q ${current_backup_marker} $remote_list
 if [ $? == 0 ]; then
   ssh $remote $zfs destroy ${current_backup_marker} 
   if [ $? != 0 ]; then
-    echo "-E- remote $zfs destroy command failed"
-    exit 1
+    fatal_and_exit "-E- remote $zfs destroy 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
-  echo "-E- remote $zfs snapshot command failed"
-  exit 1
+  fatal_and_exit "-E- remote $zfs snapshot command failed" $mailto
 fi
 
 # Check to see if the previous backup marker exists in the remote snapshot list.
@@ -150,15 +174,13 @@ if [ $no_markers == 0 ]; then
   # previous backup marker again from a previously interrupted replicate.
   $zfs rollback -r ${local_pool}/${previous_backup_marker} 
   if [ $? != 0 ]; then
-    echo "-E- remote incremental $zfs rollback command failed"
-    exit 1
+    fatal_and_exit "-E- remote incremental $zfs rollback command failed" $mailto
   fi
   # Now it should be safe to send the snaps
   ssh $remote $zfs send -R -I${previous_backup_marker} ${current_backup_marker} | 
       $zfs receive -vF -d ${local_pool}/${remote_pool}
   if [ $? != 0 ]; then
-    echo "-E- remote incremental $zfs send command failed"
-    exit 1
+    fatal_and_exit "-E- remote incremental $zfs send command failed" $mailto
   fi
 else
   # We didn't find any backup markers, next check to see if we have a common snapshot.
@@ -178,8 +200,7 @@ else
     ssh $remote $zfs send -R -I${common/*@/@} ${current_backup_marker} |
         $zfs receive -vF -d ${local_pool}/${remote_pool}
     if [ $? != 0 ]; then
-      echo "-E- remote incremental $zfs send command failed"
-      exit 1
+      fatal_and_exit "-E- remote incremental $zfs send command failed" $mailto
     fi
   else
     # We did not find any markers or a common snapshot
@@ -190,22 +211,19 @@ else
       if [[ $destroy_local_filesystem_on_full_replicate == 1 ]]; then
         $zfs destroy -r ${local_pool}/${remote_fs}
         if [ $? != 0 ]; then
-          echo "-E- remote full $zfs destroy command failed"
-          exit 1
+          fatal_and_exit "-E- remote full $zfs destroy command failed" $mailto
         fi
       else
         echo "-W- We need to destroy a local filesystem before receiving a full stream."
 	echo "    However, since the option is set to prevent this, skipping replicate operation."
-        echo "$zfs destroy -r ${local_pool}/${remote_fs} not able to run" | /usr/bin/mailx -s "zfs-replicate-all unable to destroy local filesystem" $mailto
-        exit 1
+        fatal_and_exit "unable to destroy local filesystem:\n$zfs destroy -r ${local_pool}/${remote_fs} not able to run" $mailto
       fi
     fi
     # Send the full filesystem
     ssh $remote $zfs send -R ${current_backup_marker} |
         $zfs receive -vF -d ${local_pool}/${remote_pool}
     if [ $? != 0 ]; then
-      echo "-E- remote full $zfs send command failed"
-      exit 1
+      fatal_and_exit "-E- remote full $zfs send command failed" $mailto
     fi
   fi
 fi
@@ -218,15 +236,10 @@ ssh $remote $zfs destroy ${previous_backup_marker} > /dev/null 2>&1
 # Rename the current backup marker to be the previous backup marker
 $zfs rename ${local_pool}/${current_backup_marker} ${local_pool}/${previous_backup_marker}
 if [ $? != 0 ]; then
-  echo "-E- local $zfs rename command failed"
-  exit 1
+  fatal_and_exit "-E- local $zfs rename command failed" $mailto
 fi
 ssh $remote $zfs rename ${current_backup_marker} ${previous_backup_marker}
 if [ $? != 0 ]; then
-  echo "-E- remote $zfs rename command failed"
-  exit 1
+  fatal_and_exit "-E- remote $zfs rename command failed" $mailto
 fi
-   
-# Remove tmp files
-rm -f $local_list $remote_list