Hello,
I'm working on a project with a similar setup and would like to use ATS
as a reverse proxy with caching.
My "PoOS" hosts thousands of domains, so I configured ATS as an open
relay and made a plugin to authorize requests based on a whitelist of
backend IP addresses.
For now I used option 2) for a simple round robin LB on PoOS, but in the
future I may need a more sophisticated solution, for example with
stickiness.
So my question is about the balancer plugin - why exactly is it broken?
Does the planned rewrite by Alan have an ETA?
--
Tomasz Kuzemko
[email protected]
W dniu 22.11.2012 17:36, Leif Hedstrom pisze:
On 11/22/12 6:06 AM, deepak srinivasan wrote:
Hello,
We are working on a project which uses ATS as the main component of
the design.
We wanted to do a setup like LOAD BALANCERS --> POOL OF ATS SERVERS
--> POOL OF ORIGINS SERVER.
From some discussion on the mailing list we came to know that this is
not possible.
Would request if some one can put a light on this and guide me if its
possible or not.
would like to know if remap.config or any other config file will help
me achieve ATS to forward 1 single HTTP request to multiple Origin
servers.
We are using ATS v 3.2
You have a few options:
1) Create a DNS entry for the "Pool of Origin Servers" (PoOS from now on
;), with multiple A-records. ATS will round-robin across those IPs, and
detect connect failures etc.
2) Use the Parent Proxy config (parent.config), and add your PoOS
machines there.
3) Write a simple plugin that does something intelligent when setting
the destination address of the PoOS. This is how the (broken!) balancer
plugin works, it's just not fully open sourced.
-- Leif
P.s
3) needs some serious loving, not only from the plugin perspective, but
from the fact that we don't integrate nicely with our DNS cache, health
checks, or how to handle failures (such as allowing it to try a
different machine upon failures, calling the plugin again). Alan M.
Carroll has promised he will rewrite all this, and we all get ponies
too. Thanks Alan!
P.p.s
That was a wee bit of Thanksgiving fun at the end. We get no ponies :/.
