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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>If your load balancer can do a port 80 check (or whatever port
you are using), you can block port 80 with pf to stop traffic flow, do your
updating, and return it to service by unblocking the port.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Stefan Caunter :: Senior Systems Administrator :: TOPS<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>e: scaunter@topscms.com :: m: (416) 561-4871<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>www.thestar.com www.topscms.com<o:p></o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> varnish-misc-bounces@varnish-cache.org
[mailto:varnish-misc-bounces@varnish-cache.org] <b>On Behalf Of </b>Mohan Rao<br>
<b>Sent:</b> September-15-10 9:26 AM<br>
<b>To:</b> varnish-misc@varnish-cache.org<br>
<b>Subject:</b> Probing to see if Varnish is Alive.<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>Hi,<o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal>Is there a way to probe a varnish server to see if it is
alive ? We have a couple of varnish servers that are load balanced. We would
like the load balancer to stop sending traffic to a particular varnish server
if we are updating that server. Is there a recommended way to do this ?<o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal>Thanks & Regards,<o:p></o:p></p>
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<p class=MsoNormal>Mohan<o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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