Nginx / varnish / apache with RT?

Hi all,

i’ve been playing with an NVA setup for some lamp sites (Joomla) and the
scaling is looking pretty amazing… still early days but initial results
look very promising.

anyway, it got me thinking to whether varnish would work with RT. I’m
familiar enough with it to understand the generic accelerator principle …
but I don’t see how it would work with generated content - because of RT
handles sessions / authentication / etc. Or is it smart enough to know that
if I visit the same ticket twice in a row and the ticket hasn’t changed, to
give me cached content?

I’ve tried searching for “perl varnish” and “request tracker varnish” type
pages but have only found one archive thread
http://www.gossamer-threads.com/lists/rt/users/72455 which appears
inconclusive - does it actually make a noticeable difference or not?
Internally we’re using a squid proxy, and we have a small number of users,
so not sure that the static page elements being handled by varnish or nginx
would offer a huge advantage? anyway keen to hear people’s experiences or
other thoughts on accelerating RT…

Cheers,

Chris

Am Tue, 6 Aug 2013 21:04:25 +1000
schrieb Chris Herrmann chrisherrmann7@gmail.com:

Hi all,

i’ve been playing with an NVA setup for some lamp sites (Joomla) and
the scaling is looking pretty amazing… still early days but initial
results look very promising.

anyway, it got me thinking to whether varnish would work with RT. I’m
familiar enough with it to understand the generic accelerator
principle … but I don’t see how it would work with generated
content - because of RT handles sessions / authentication / etc. Or
is it smart enough to know that if I visit the same ticket twice in a
row and the ticket hasn’t changed, to give me cached content?

I’ve tried searching for “perl varnish” and “request tracker varnish”
type pages but have only found one archive thread
Carbon60: Cloud Consulting - Services and Solutions which appears
inconclusive - does it actually make a noticeable difference or not?
Internally we’re using a squid proxy, and we have a small number of
users, so not sure that the static page elements being handled by
varnish or nginx would offer a huge advantage? anyway keen to hear
people’s experiences or other thoughts on accelerating RT…

I have no experience running RT with NGNIX (only installed it as
proof-of-concept once), but from what I can remember, it’s serving all
the static files directly (if you follow the documentation, you don’t
even need Apache anymore) and maybe also cached data.

I sincerely doubt you’d hit a scalabilty-wall in NGINX before running
out of CPU for the spawn-fcgi perl processes. Adding varnish to the mix
looks to me like a wasted effort (if you serve RT over SSL, you’d need
NGINX in front of it, again, because varnish does not do SSL at all).

Hi all,

i’ve been playing with an NVA setup for some lamp sites (Joomla) and the
scaling is looking pretty amazing… still early days but initial results
look very promising.

anyway, it got me thinking to whether varnish would work with RT. I’m
familiar enough with it to understand the generic accelerator principle …
but I don’t see how it would work with generated content - because of RT
handles sessions / authentication / etc. Or is it smart enough to know that
if I visit the same ticket twice in a row and the ticket hasn’t changed, to
give me cached content?

I’ve tried searching for “perl varnish” and “request tracker varnish” type
pages but have only found one archive thread
Carbon60: Cloud Consulting - Services and Solutions which appears
inconclusive - does it actually make a noticeable difference or not?
Internally we’re using a squid proxy, and we have a small number of users,
so not sure that the static page elements being handled by varnish or nginx
would offer a huge advantage? anyway keen to hear people’s experiences or
other thoughts on accelerating RT…

Cheers,

Chris

Hi Chris,

We have tried nginx/fastCGI both with and without nginx caching the static
content. The biggest win was just moving from Apache/mod_perl to the nginx/
fastCGI. It made RT much more scalable and allowed us to manage its resource
allocation better. I do not think that varnish would do anything except add
complexity to the setup.

Regards,
Ken

Hi all,

i’ve been playing with an NVA setup for some lamp sites (Joomla) and the
scaling is looking pretty amazing… still early days but initial results
look very promising.

anyway, it got me thinking to whether varnish would work with RT. I’m
familiar enough with it to understand the generic accelerator principle

but I don’t see how it would work with generated content - because of RT
handles sessions / authentication / etc. Or is it smart enough to know
that
if I visit the same ticket twice in a row and the ticket hasn’t changed,
to
give me cached content?

I’ve tried searching for “perl varnish” and “request tracker varnish”
type
pages but have only found one archive thread
Carbon60: Cloud Consulting - Services and Solutions which appears
inconclusive - does it actually make a noticeable difference or not?
Internally we’re using a squid proxy, and we have a small number of
users,
so not sure that the static page elements being handled by varnish or
nginx
would offer a huge advantage? anyway keen to hear people’s experiences or
other thoughts on accelerating RT…

Cheers,

Chris

Hi Chris,

We have tried nginx/fastCGI both with and without nginx caching the static
content. The biggest win was just moving from Apache/mod_perl to the nginx/
fastCGI. It made RT much more scalable and allowed us to manage its
resource
allocation better. I do not think that varnish would do anything except add
complexity to the setup.

care to share your nginx/fascgi config ? I am seeing one in the
http://bestpractical.com/docs/rt/latest/web_deployment.html#nginx
as a start.

Regards,
Ken

Asif Iqbal
PGP Key: 0xE62693C5 KeyServer: pgp.mit.edu
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?

care to share your nginx/fascgi config ? I am seeing one in the
Web deployment - RT 5.0.3 Documentation - Best Practical
as a start.

I used that from doc with an exception of adding some ssl options and
adding fastcgi_param HTTPS on;

It works pretty well. And then I found Ruslan has a cool nginx extension in
github. I tried that and it works too
except I do not see an option to run in ssl mode.

Asif Iqbal
PGP Key: 0xE62693C5 KeyServer: pgp.mit.edu
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?