Thanks Willy. I'll need to get up to speed on using ACL's and multiple
backends. I'll scrape together a config and then post back if I can't
figure it out. This will be excellent if I can get it to work.
Brian Koloszyc
CREATIVE MERCHANDISE, LLC | p. 415.787.4824 | f. 415.276.3180
On 04/08/2010 02:21 PM, Willy Tarreau wrote:
On Thu, Apr 08, 2010 at 02:17:31PM -0700, Brian Koloszyc wrote:
Hi,
I'm wondering if it is possible to load balance using the User-Agent
string with the "balance hdr(User-Agent)" option?
yes but I'm not sure it's of any use. Hash-based balance algorithms
are efficient when the population is very large and well distributed.
Here you'll mainly have 4-5 different user agents, some of which may
land on the same server, so the balancing could be very poor.
For example, ideally I would like to have haproxy inspect the User-Agent
header string, and if the User-Agent = x then send traffic to server A,
else send traffic to server B.
OK so it's different. The first solution above might work by pure luck.
Here if you know that one specific user agent should be sent to one
specific server, use two backends with an ACL to decide which one to
use depending on the header.
Regards,
Willy
