<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=Content-Type content="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 11 (filtered medium)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:Verdana;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal;
font-family:Verdana;
color:black;
font-weight:normal;
font-style:normal;
text-decoration:none none;}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:Verdana;
color:blue;
font-weight:normal;
font-style:normal;
text-decoration:none none;}
@page Section1
{size:612.0pt 792.0pt;
margin:72.0pt 90.0pt 72.0pt 90.0pt;}
div.Section1
{page:Section1;}
-->
</style>
</head>
<body lang=EN-US link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>Hello,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>We use LVS on Redhat 5.1
(2.6.18-53.el5) on 2 IBMS X3650 servers. Here are the RPM versions:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>ipvsadm-1.24-8.1.i386.rpm<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>system-config-cluster-1.0.50-1.3.noarch.rpm<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>piranha-0.8.4-7.el5.i386.rpm<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>The two servers are
configured as one master / one backup. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>They are also
configured to hold the virtual service RTSP. This service is load balanced with
round robin method between the two RTSP gateways (the real servers are also the
two X3650 servers).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>When a RTSP session is
set up, LVS selects the RTSP gateway, the session is initialized by accessing
database and then Video server.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>When established, the
RTSP session only access the video server for streaming.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>The monitoring script
chosen to monitor the real server is: RTSP access test <b><span
style='font-weight:bold'>and</span></b> database access test.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>If the database is no
more available, the monitoring script returns a bad answer and the service goes
down: the process nanny shuts down the IP:PORT session.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>Because of this
shutting down, all the current streamings on this RTSP gateway stop.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>Here are the logs:<br>
Jan 8 17:28:17 FHS1 nanny[10420]: Trouble. Recieved results are not what we expected
from (172.20.253.215)<br>
Jan 8 17:28:17 FHS1 nanny[10420]: shutting down 172.20.253.215:554 due to
connection failure<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>For robustness reason,
we need that nanny process prevents new connections when the database goes
down. But we need that current RTSP sessions go on, NOT STOP.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>Is there any way not
to shutdown current connections when the monitoring scripts answer not what
expected? Dynamically change weight of the real servers to zero for example?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>Thank you for your
answer.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'>Anne<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:black'><o:p> </o:p></span></font></p>
</div>
</body>
</html>