Comments on: Solving Common ELB Problems with a Sanity Test http://www.shlomoswidler.com/2009/09/solving-common-elb-problems-with-sanity.html Cloud Developer Tips: Practical tips for developers of cloud computing applications. Thu, 22 Jul 2010 02:24:54 +0000 hourly 1 http://wordpress.org/?v=3.0 By: shlomohttp://www.shlomoswidler.com/2009/09/solving-common-elb-problems-with-sanity.html/comment-page-1#comment-16 shlomo Thu, 24 Dec 2009 05:27:22 +0000 http://orchestratus.com/shlomoswidler.com/?p=8#comment-16 @Logan Green,<br /><br />There's no API to modify the listeners of an ELB. So you'll need to create a new ELB with both HTTP:80 and TCP:443 listeners specified at creation time. @Logan Green,

There's no API to modify the listeners of an ELB. So you'll need to create a new ELB with both HTTP:80 and TCP:443 listeners specified at creation time.

]]> By: Logan Greenhttp://www.shlomoswidler.com/2009/09/solving-common-elb-problems-with-sanity.html/comment-page-1#comment-17 Logan Green Thu, 24 Dec 2009 05:17:51 +0000 http://orchestratus.com/shlomoswidler.com/?p=8#comment-17 Is it possible to edit a load balancer to forward additional ports? For example we launched our aws ELB forwarding port 80, and now we want to add https support and forward 443 as well. Do I need to create a new ELB or can I edit my existing one? Is it possible to edit a load balancer to forward additional ports? For example we launched our aws ELB forwarding port 80, and now we want to add https support and forward 443 as well. Do I need to create a new ELB or can I edit my existing one?

]]> By: Prabhakarhttp://www.shlomoswidler.com/2009/09/solving-common-elb-problems-with-sanity.html/comment-page-1#comment-18 Prabhakar Tue, 15 Sep 2009 22:15:43 +0000 http://orchestratus.com/shlomoswidler.com/?p=8#comment-18 Excellent post! Very useful tips on what to look for while debugging ELBs. We just integrated this approach into our management UI - http://vimeo.com/6592989<br /><br />thanks! Excellent post! Very useful tips on what to look for while debugging ELBs. We just integrated this approach into our management UI – http://vimeo.com/6592989

thanks!

]]> By: Kenhttp://www.shlomoswidler.com/2009/09/solving-common-elb-problems-with-sanity.html/comment-page-1#comment-19 Ken Tue, 15 Sep 2009 20:58:33 +0000 http://orchestratus.com/shlomoswidler.com/?p=8#comment-19 Very useful post! I just saw that <a href="http://ylastic.com" rel="nofollow">Ylastic</a> integrated your sanity check approach into their dashboard. Nice!<br /><br />I wanted to share a problem I had recently. Because of some current ELB issues, it is possible to cause an ELB to get into an inconsistent state by terminating one of its instances without first deregistering it from the ELB. See the thread <a href="http://developer.amazonwebservices.com/connect/thread.jspa?threadID=36257" rel="nofollow">Mysterious "server=0" content returned by ELB</a> on the AWS forums.<br /><br />Also, if you are trying to read client IP addresses on a server behind an ELB, see my blog post: <a href="http://blog.kenweiner.com/2009/09/amazon-elb-capturing-client-ip-address.html" rel="nofollow">Amazon ELB - Capturing Client IP Address</a> Very useful post! I just saw that Ylastic integrated your sanity check approach into their dashboard. Nice!

I wanted to share a problem I had recently. Because of some current ELB issues, it is possible to cause an ELB to get into an inconsistent state by terminating one of its instances without first deregistering it from the ELB. See the thread Mysterious "server=0" content returned by ELB on the AWS forums.

Also, if you are trying to read client IP addresses on a server behind an ELB, see my blog post: Amazon ELB – Capturing Client IP Address

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