X-Git-Url: http://git.pippins.net/embedvideo/.git/static/gitweb.js?a=blobdiff_plain;f=zfs-replicate;h=174d6dd5ef7f834e0efa252a5e5545e7e47c08dd;hb=33fdac775c0fe55f73bb79166b33846ac3381bde;hp=413d078e05cf28311896be3d7d94bcca454aa6d0;hpb=a7cc781d51dcfb24d9a062bdb60ba76ea79be676;p=zfs-ubuntu%2F.git

diff --git a/zfs-replicate b/zfs-replicate
index 413d078..174d6dd 100755
--- a/zfs-replicate
+++ b/zfs-replicate
@@ -1,26 +1,24 @@
-#/bin/bash
+#!/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"
 hostname=`hostname`
 
-# 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
-mailx=/usr/bin/mailx
-
-# 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
-
 # Setup our cleanup and exit trap
 cleanup() {
   if [[ -e "$local_list" ]]; then
@@ -29,18 +27,31 @@ cleanup() {
   if [[ -e "$remote_list" ]]; then
     rm -f $remote_list
   fi
-  if [[ -n "$remote" ]]; then
-    ssh $remote ls -d "$remote_lockdir" > /dev/null 2>&1
-    if [[ $? == 0 ]]; then
-      ssh $remote rm -rf "$remote_lockdir"
-    fi
+  $ssh $remote ls -d "$lockdir" > /dev/null 2>&1
+  if [[ $? == 0 ]]; then
+    $ssh $remote rm -rf "$lockdir"
   fi
 }
 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 ${backup_pool}/${current_backup_marker} > /dev/null 2>&1
+    if [ $? == 0 ]; then
+      $zfs destroy ${backup_pool}/${current_backup_marker}
+    fi
+  fi
+  if [[ -n "$previous_backup_marker" ]]; then
+    zfs list -t snapshot ${backup_pool}/${previous_backup_marker} > /dev/null 2>&1 
+    if [ $? == 0 ]; then
+      $zfs destroy ${backup_pool}/${previous_backup_marker}
+    fi
+  fi
+  # send email notification
   if [[ -n "$2" ]]; then
     echo -e "$1" | $mailx -s "zfs replicate on $hostname failed" "$2"
   fi
+  # exit
   exit 1
 }
 trap fatal_and_exit INT
@@ -51,26 +62,32 @@ if [[ -z "$remote" ]] || [[ -z "$remote_fs" ]]; then
   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
+# check for localhost
+if [[ $remote = "localhost" ]]; then
+  remote=""
+  ssh=""
+fi
+
+# Make sure the local backup pool and local receiving filesystem exist, or print some errors
+zpool list -H "$backup_pool" >/dev/null 2>&1
 if [ $? != 0 ]; then
-  fatal_and_exit "-E- The local pool, '$local_pool' doesn't seem to exist." $mailto
+  fatal_and_exit "-E- The local backup pool, '$backup_pool' doesn't seem to exist." $mailto
 fi
-zfs list "$local_pool/$remote_pool" >/dev/null 2>&1
+zfs list "$backup_pool/$remote_pool" >/dev/null 2>&1
 if [ $? != 0 ]; then
-  echo >&2 "-I- The local filesystem for the remote pool, '$local_pool/$remote_pool' doesn't seem to exist."
-  echo >&2 "    Creating the local filesystem to receive the remote pool into: $local_pool/$remote_pool"
-  $zfs create $local_pool/$remote_pool
+  echo >&2 "-I- The local filesystem for the remote pool, '$backup_pool/$remote_pool' doesn't seem to exist."
+  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 create command failed" $mailto
   fi
 fi
 
-# Obtain the zpool guid for the local pool
-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
+# Obtain the zpool guid for the local backup pool
+backup_pool_guid=`zpool get guid $backup_pool 2>&1 | grep $backup_pool | awk '{ print $3 }'`
+zpool get guid $backup_pool > /dev/null 2>&1
 if [ $? != 0 ]; then
-  fatal_and_exit "-E- Unable to extract the guid for the local pool: $local_pool" $mailto
+  fatal_and_exit "-E- Unable to extract the guid for the local backup pool: $backup_pool" $mailto
 fi
 
 # Turn on shell verbosity
@@ -79,10 +96,10 @@ set -x
 # Create the remote lockdir before continuing with the replicate
 # Spinlock on creating the lock
 maxsleeptime=60
-maxattempts=100
+maxattempts=500
 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
@@ -96,18 +113,18 @@ while true; do
   if [[ $attempts -gt $maxattempts ]]; then
     # We've exceeded our maximum while loop count
     echo "-E- The zfs filesystem has been locked down. Skipping replicate operation."
-    fail_msg=`ssh $remote ls -ld $remote_lockdir 2>&1`
+    fail_msg=`$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
 
 # Setup our backup marker names
-current_backup_marker=${remote_fs}@current-backup-${local_pool_guid}
-previous_backup_marker=${remote_fs}@previous-backup-${local_pool_guid}
+current_backup_marker=${remote_fs}@current-backup-${backup_pool_guid}
+previous_backup_marker=${remote_fs}@previous-backup-${backup_pool_guid}
 
 # List the snapshots on the remote machine.
 remote_list=$(mktemp /tmp/replicate.XXXXXX)
-ssh $remote \
+$ssh $remote \
     $zfs list -H -t snapshot |
     grep ^${remote_fs}@ |
     awk '{print$1}' > $remote_list
@@ -120,9 +137,9 @@ fi
 # If you do, it can mess up the common finding algorithm below.
 local_list=$(mktemp /tmp/replicate.XXXXXX)
 $zfs list -H -t snapshot |
-    grep ^${local_pool}/${remote_fs}@ |
-    grep -v ^${local_pool}/${current_backup_marker} | 
-    awk "{gsub(/^$local_pool./,\"\",\$1); print\$1}" > $local_list
+    grep ^${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 command failed" $mailto
 fi
@@ -130,14 +147,14 @@ fi
 # 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} 
+  $ssh $remote $zfs destroy ${current_backup_marker} 
   if [ $? != 0 ]; then
     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 ${current_backup_marker}
+$ssh $remote $zfs snapshot ${current_backup_marker}
 if [ $? != 0 ]; then
   fatal_and_exit "-E- remote $zfs snapshot command failed" $mailto
 fi
@@ -155,17 +172,22 @@ no_markers=$(($no_markers || $?))
 if [ $no_markers == 0 ]; then
   # We found backup markers, incrementally send the new snaps
 
-  # First, rollback the local pool to the previous backup marker in case the previous
+  # First, rollback the local backup pool to the previous backup marker in case the previous
   # 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 ${local_pool}/${previous_backup_marker} 
+  $zfs rollback -r ${backup_pool}/${previous_backup_marker} 
   if [ $? != 0 ]; then
     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 [[ $throttle_enable == 1 && -e $throttle ]]; then
+    $ssh $remote $zfs send -R -I${previous_backup_marker} ${current_backup_marker} | 
+        $throttle $throttle_opt | $zfs receive -vF -d ${backup_pool}/${remote_pool}
+  else 
+    $ssh $remote $zfs send -R -I${previous_backup_marker} ${current_backup_marker} |
+        $zfs receive -vF -d ${backup_pool}/${remote_pool}
+  fi
   if [ $? != 0 ]; then
     fatal_and_exit "-E- remote incremental $zfs send command failed" $mailto
   fi
@@ -184,8 +206,13 @@ else
 
   if [[ -n "$common" ]]; then
     # We found a common snapshot, incrementally send the new snaps
-    ssh $remote $zfs send -R -I${common/*@/@} ${current_backup_marker} |
-        $zfs receive -vF -d ${local_pool}/${remote_pool}
+    if [[ $throttle_enable == 1 && -e $throttle ]]; then
+      $ssh $remote $zfs send -R -I${common/*@/@} ${current_backup_marker} |
+          $throttle $throttle_opt | $zfs receive -vF -d ${backup_pool}/${remote_pool}
+    else
+      $ssh $remote $zfs send -R -I${common/*@/@} ${current_backup_marker} |
+          $zfs receive -vF -d ${backup_pool}/${remote_pool}
+    fi
     if [ $? != 0 ]; then
       fatal_and_exit "-E- remote incremental $zfs send command failed" $mailto
     fi
@@ -193,22 +220,27 @@ else
     # We did not find any markers or a common snapshot
     # At this point, we'll have to send the entire filesystem
     # Destroy the local filesystem if it exists before receving the full replicate
-    zfs list ${local_pool}/${remote_fs} > /dev/null 2>&1
+    zfs list ${backup_pool}/${remote_fs} > /dev/null 2>&1
     if [ $? == 0 ]; then
       if [[ $destroy_local_filesystem_on_full_replicate == 1 ]]; then
-        $zfs destroy -r ${local_pool}/${remote_fs}
+        $zfs destroy -r ${backup_pool}/${remote_fs}
         if [ $? != 0 ]; then
           fatal_and_exit "-E- remote full $zfs destroy command failed" $mailto
         fi
       else
         echo "-W- We need to destroy a local filesystem before receiving a full stream."
 	echo "    However, since the option is set to prevent this, skipping replicate operation."
-        fatal_and_exit "unable to destroy local filesystem:\n$zfs destroy -r ${local_pool}/${remote_fs} not able to run" $mailto
+        fatal_and_exit "unable to destroy local filesystem:\n$zfs destroy -r ${backup_pool}/${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 [[ $throttle_enable == 1 && -e $throttle ]]; then
+      $ssh $remote $zfs send -R ${current_backup_marker} |
+          $throttle $throttle_opt | $zfs receive -vF -d ${backup_pool}/${remote_pool}
+    else
+      $ssh $remote $zfs send -R ${current_backup_marker} |
+          $zfs receive -vF -d ${backup_pool}/${remote_pool}
+    fi
     if [ $? != 0 ]; then
       fatal_and_exit "-E- remote full $zfs send command failed" $mailto
     fi
@@ -217,16 +249,15 @@ fi
  
 # destroy the previous backup markers now that we've replicated past them
 # don't check the return codes here because these may not exist, and that is ok
-$zfs destroy ${local_pool}/${previous_backup_marker} > /dev/null 2>&1
-ssh $remote $zfs destroy ${previous_backup_marker} > /dev/null 2>&1
+$zfs destroy ${backup_pool}/${previous_backup_marker} > /dev/null 2>&1
+$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}
+$zfs rename ${backup_pool}/${current_backup_marker} ${backup_pool}/${previous_backup_marker}
 if [ $? != 0 ]; then
   fatal_and_exit "-E- local $zfs rename command failed" $mailto
 fi
-ssh $remote $zfs rename ${current_backup_marker} ${previous_backup_marker}
+$ssh $remote $zfs rename ${current_backup_marker} ${previous_backup_marker}
 if [ $? != 0 ]; then
   fatal_and_exit "-E- remote $zfs rename command failed" $mailto
 fi
-