Re: [load balancing] code updates

From: Ben Wilson <bwilson [izzat] psecu.com>
Date: Fri Sep 28 2007 - 08:10:41 EDT

Hmm, never mind. This won't work. They still want to manually test each
node after updates are applied...

Back to disabling nodes!

> -----Original Message-----
> From: lb-l-bounces@vegan.net [mailto:lb-l-bounces@vegan.net] On Behalf
> Of Ben Wilson
> Sent: Thursday, September 27, 2007 11:08 AM
> To: Load Balancing Mailing List
> Subject: Re: [load balancing] code updates
>
> Thanks, using monitors sounds like a safe way to go. The current
> monitors are too generic, but I tested a more specific monitor and
> disabling sites in IIS and it works fine.
>
> Send String: GET /test.html HTTP/1.0\r\nHost:
> www8.psecu.com\r\nConnection: close\r\n
> Receive String: www8.psecu.com (only contents of test.html)
>
> Then on the web server:
>
> iisweb /stop www8.psecu.com
>
> Works great!
>
> Also, I wasn't aware the there where pool member specific monitors.
> Since we have 1 to 1 mapping between web and app servers that could be
> useful, but we plan on load balancing the back end next year, so I
> probably won't bother with it.
>
> --
> Ben
>
> > -----Original Message-----
> > From: lb-l-bounces@vegan.net [mailto:lb-l-bounces@vegan.net] On
> Behalf
> > Of LeMay, John
> > Sent: Wednesday, September 26, 2007 3:53 PM
> > To: Load Balancing Mailing List
> > Subject: Re: [load balancing] code updates
> >
> >
> > I've stuck with using monitors myself for controlling up/down in a
> > somewhat automated fashion. Since multiple monitors can be assigned
> to
> > a node or member, I create and use specific monitors that will down
> the
> > node/member based on some service. Reverse monitors can be used here
> as
> > well - ie disable node x if we are able to connect to the ftp
> service.
> > Unless you use ftp on the server in question, or unless you are able
> to
> > limit ftp access to the server to a secure network, this may work
for
> > you. Obviously virtually any service with a listener would work
here.
> >
> > --
> > John LeMay
> >
> > -----Original Message-----
> > From: lb-l-bounces@vegan.net [mailto:lb-l-bounces@vegan.net] On
> Behalf
> > Of Ben Wilson
> > Sent: Wednesday, September 26, 2007 14:39
> > To: lb-l@vegan.net
> > Subject: [load balancing] code updates
> >
> > Hi,
> >
> > We are starting to automate code updates for servers behind our F5
> load
> > balancers.
> >
> > There are a few options for disabling nodes while code is updated
and
> > tested and I was looking for some feedback for what has/hasn't
> worked.
> >
> > Right now I am looking at using ssh (key authorization) with
> "bigpipe"
> > or iControl.
> >
> > Any ideas/experiences appreciated!
> >
> > --
> > Ben
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Received on Fri Sep 28 08:11:38 2007

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