[Lxm-commits-diff] SF.net SVN: lxm: [5] trunk/bash_scripts/lxmstart

[<ou...@us...>]

Revision: 5
          http://lxm.svn.sourceforge.net/lxm/?rev=5&view=rev
Author:   outchy
Date:     2007-11-12 14:30:00 -0800 (Mon, 12 Nov 2007)

Log Message:
-----------
additional checks before launching a VM: test if already launched and test of logical volumes as snapshot source of other snapshots

Modified Paths:
--------------
    trunk/bash_scripts/lxmstart

Modified: trunk/bash_scripts/lxmstart
===================================================================
--- trunk/bash_scripts/lxmstart	2007-11-09 20:07:47 UTC (rev 4)
+++ trunk/bash_scripts/lxmstart	2007-11-12 22:30:00 UTC (rev 5)
@@ -13,14 +13,69 @@
 for CONFDIR in $XENCONFPATH; do
   if [ -f "$CONFDIR/$VMNAME" ]; then
     echo "launching virtual machine $CONFDIR/$VMNAME"
+
+    xm list --long $VMNAME > /dev/null 2> /dev/null
+    if [ "$?" == "0" ]; then
+      echo "error virtual machine $VMNAME is already launched"
+      exit 1
+    fi
+
+    DISKLIST=`echo "disk" | python -i "$CONFDIR/$VMNAME" 2>/dev/null`
+    if [ ! "$?" == "0" ]; then
+      echo "error while probing disk list"
+      exit 1
+    fi
+
+    echo "disk list is $DISKLIST"
+    LVLIST=`echo "$DISKLIST" | awk "/\[/ {
+        sep1 = \"['\\\\\"]\"
+	sep2 = \",\"
+	sep3 = \":\"
+	split(\\\$0, a, sep1)
+	i = 2
+	while (i <= length(a)) {
+	  split(a[i], b, sep2)
+	  if ( b[3] == \"w\" ) {
+	    c = index(b[2], \":cdrom\")
+	    if (c == 0) {
+	      split(b[1], d, sep3)
+	      if (d[1] == \"phy\" ) {
+	        print d[2]
+              }
+	    }
+	  }
+	  i++
+	  i++
+	}
+      }"`
+
+    echo "logical volume list is $LVLIST"
+
+    if [ ! -z "$LVLIST" ]; then
+      for LV in $LVLIST ; do
+        echo "checking logical volume: $LV"
+        LVPROP=`lvdisplay "$LV"`
+        if [ "$?" == "0" ]; then
+          # this is a logical volume, check if it sources some snapshots
+          LVSNAPSTATUS=`echo "$LVPROP" | grep "LV snapshot status" | grep "source of"`
+	  if [ ! -z "$LVSNAPSTATUS" ]; then
+	    echo "logical volume $LV sources a snapshot and thus cannot be launched with write access mode"
+	    exit 1
+	  fi
+        fi
+      done
+    fi
+
+    echo "check of logical volumes passed"
+
     xm create $CONFDIR/$VMNAME
-    if [ ! "$?" = "0" ]; then
+    if [ ! "$?" == "0" ]; then
       echo "error while launching virtual machine $VMNAME"
       exit 1
     fi
 
     # auto execute viewer
-    if [ ! "$2" = "NODISPLAY" ]; then
+    if [ ! "$2" == "NODISPLAY" ]; then
       lxmdisplay $VMNAME
     fi
 


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