This is a MDS failover script in python.It uses the LDAP server to get the failover...

diff --git a/lustre/utils/ha_assist2 b/lustre/utils/ha_assist2
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+#!/usr/bin/python2
+# Author: Ravindranadh Chowdary Sahukara <s-ravindranadh_chowdary@hp.com>
+
+#   This file is part of Lustre, http://www.lustre.org.
+#
+#   Lustre is free software; you can redistribute it and/or
+#   modify it under the terms of version 2 of the GNU General Public
+#   License as published by the Free Software Foundation.
+#
+#   Lustre is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with Lustre; if not, write to the Free Software
+#   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+#
+#Author : Ravindranadh Chowdary Sahukara <s-ravindranadh_chowdary@hp.com>
+
+from lutils import *
+
+
+def network(failedUUID, failoverUUID, failoverNode, failovernetType, failoverPort):
+       lctl=LCTLInterface('lctl')
+       if failovernetType == 'tcp':
+               cmd = """
+               network %s
+               close_uuid %s
+               del_uuid %s
+               connect %s %d
+               add_uuid %s %s
+               name2dev RPCDEV
+               probe
+               newconn %s
+               quit""" % (failovernetType,failedUUID, failedUUID, failoverNode,int(failoverPort),failoverUUID,failoverNode,failoverUUID)
+               print cmd
+               lctl.run(cmd)
+               
+
+def main():
+       FailedNetUUID=sys.argv[1:][0]
+       print FailedNetUUID
+       print "ha assist checking for problems"
+       if not os.access("/tmp/halog",os.R_OK):
+               print "no problems ..exiting"
+               sys.exit(1)
+               
+       try:
+               fp=open("/etc/lustre/ldapserver","r")
+               line=fp.readline()
+               fp.close()
+        except IOError, e:
+            log(e)
+
+       ldapinfo=string.split(line,':')
+       server=ldapinfo[0]
+       port=ldapinfo[1]
+       base="fs=lustre"
+       myCon=MyConn(server,port)
+       myCon.open()
+
+       connId=myCon.id
+       lustreNet=LustreNet()
+       lustreNet.getEntry_from_ldap(connId,base,FailedNetUUID)
+       
+       nodename=socket.gethostname()
+
+       nodename=lustreNet.id
+       failoverNetUUID=lustreNet.fnetUUID
+       lustreNet=LustreNet()
+       lustreNet.getEntry_from_ldap(connId,base,failoverNetUUID)
+       
+       network(FailedNetUUID, failoverNetUUID, lustreNet.id, lustreNet.netType, lustreNet.port)
+       
+
+
+if __name__ == "__main__":
+       main()
+
+
+