From: Alan J. Pippin <ajp@pippins.net>
Date: Fri, 22 Aug 2008 05:45:36 +0000 (-0600)
Subject: Added safegaurds to prevent script from running on top of itself
X-Git-Url: http://git.pippins.net/embedvideo/.git/%22%22.%24thumbnail.%22/%24link?a=commitdiff_plain;h=e52d277a87f755e063e35a74fbc2a94de84a4462;p=zfs-nexenta%2F.git

Added safegaurds to prevent script from running on top of itself
---

diff --git a/zfs-autosnap-wrapper b/zfs-autosnap-wrapper
index ad8f4fc..813d9fe 100755
--- a/zfs-autosnap-wrapper
+++ b/zfs-autosnap-wrapper
@@ -7,8 +7,16 @@
 # Setup some default values
 autosnap="/usr/local/etc/bin/zfs-autosnap"
 logfile="/var/log/zfs/zfs-autosnap.log"
+lockdir="/tmp/zfs-autosnap-all"
 numsnapshots=20
 maxagedays=365
+date=`date`
+
+# Make sure we aren't already running
+if ! mkdir "$lockdir" >/dev/null 2>&1; then
+  echo "$date Another $0 process is already running" >> $logfile
+  exit 1
+fi
 
 # Auto snapshot every zfs filesystem on the system specified below
 date >> $logfile
@@ -27,7 +35,14 @@ $autosnap tank/usr/local/etc /usr/local/etc $numsnapshots $maxagedays
 
 # Daily filesystems (only perform these at midnight)
 if [ `date +"%H:%M"` == "00:00" ]; then 
-  $autosnap tank/var /var $numsnapshots $maxagedays
-  $autosnap tank/usr/local/var /usr/local/var $numsnapshots $maxagedays
+   echo "Performing Daily snapshots" >> $logfile
+fi
+
+# Weekly filesystems (only perform these on Sunday at midnight)
+if [ `date +"%H:%M:%u"` == "00:00:7" ]; then
+  echo "Performing Weekly snapshots" >> $logfile
+  $autosnap tank/var /var $numsnapshots 60
+  $autosnap tank/usr/local/var /usr/local/var $numsnapshots 60
 fi
 
+rm -rf "$lockdir"
diff --git a/zfs-replicate-wrapper b/zfs-replicate-wrapper
index faeaeb0..b52e64e 100755
--- a/zfs-replicate-wrapper
+++ b/zfs-replicate-wrapper
@@ -9,41 +9,51 @@ replicate="/usr/local/etc/bin/zfs-replicate"
 logfile_parser="/usr/local/etc/bin/zfs-log-parser"
 logfile="/var/log/zfs/zfs-replicate.log"
 lockdir="/tmp/zfs-admin-lock"
+mailto=root
 destpool="backups"
 maxsleeptime=60
+maxattempts=600
 released_lock_date=0
+date=`date`
 
 # Setup our cleanup and exit trap
 cleanup() { 
   rm -rf "$lockdir"
   if [ $released_lock_date == 0 ]; then 
+    zpool export $destpool
+    /usr/local/etc/bin/usb-drive-power off
     echo `date` ZFS admin lock released >> $logfile
   fi
 }
 trap cleanup EXIT
 
 # Auto snapshot every zfs filesystem on the system specified below
-date=`date`;
 echo "$date Polling for ZFS admin lock" >> $logfile
 
 # Poll for a lock on the zfs subsystem, and make the lock once we can do so
+attempts=0
 while true; do
   if ! mkdir "$lockdir" >/dev/null 2>&1; then
     # Another zfs admin tool is running.
     # Wait a random amount of time and try again
     ransleep=$(($RANDOM % $maxsleeptime))
     sleep $ransleep
+    ((attempts=attempts+1))
   else 
     # No other zfs admin tool is running, we can now.
     break
   fi
+  if [[ $attempts -gt $maxattempts ]]; then
+    # We've exceeded our maximum while loop count
+    ls -ld $lockdir | /usr/bin/mailx -s "zfs-replicate-all unable to obtain zfs admin lock" $mailto
+    exit 1
+  fi
 done
 date=`date`;
 echo "$date ZFS admin lock obtained" >> $logfile
 
 # Poweron the destpool and import it
-/usr/local/bin/br -x /dev/ttyd0 A3 ON
-sleep 10
+/usr/local/etc/bin/usb-drive-power on >> $logfile
 zpool import $destpool
 
 # List the filesystems to replicate
@@ -62,7 +72,7 @@ $replicate tank/backup $destpool
 
 # Export the destpool and power it down
 zpool export $destpool
-/usr/local/bin/br -x /dev/ttyd0 A3 OFF
+/usr/local/etc/bin/usb-drive-power off >> $logfile
 
 # Release our lock
 released_lock_date=1
@@ -70,3 +80,4 @@ echo `date` ZFS admin lock released >> $logfile
 
 # Parse the log file and extract our backup stats
 $logfile_parser "$logfile" "$date" >> $logfile
+