Comments on: Deploying Ruby on Rails on Ubuntu Feisty Fawn via Mongrel Cluster and Apache

By: ryanm

ryanm — Mon, 13 Oct 2008 04:27:09 +0000

In case anyone else comes across this.. The command to create the cluster config file is missing the -c option which tells the cluster where the app is located.

should be something like this:

mongrel_rails cluster::configure -p 8000 -N 3 -c /var/www/my_rails_app

Otherwise, how is the mongrel_cluster script supposed to know where the app is? Maybe the options were different at the time this was written up?

By: Remington D.

Remington D. — Tue, 26 Feb 2008 05:16:37 +0000

I’m sorry, you seem to have mistaken me for someone who cares.

By: Ani

Ani — Tue, 15 Jan 2008 13:50:28 +0000

Ok i’ve got a noobish question (if anybody still visits this place)

What if I want to run multiple application with load-balancer. How can I make a seperate entry for a new application and make sure it gets a new load-balancer so it doesnt end up proxy-ing it to an other application.

By: alfredo

alfredo — Tue, 09 Oct 2007 20:26:25 +0000

A word of note: Ruby 1.8.5 doesnt work with mongrel_cluster 1.0.2

you need to install manually (not apt-get) the 1.8.6 version

By: Jereme

Jereme — Wed, 12 Sep 2007 00:03:22 +0000

I’m running into a problem with the Apache2 setup. Every time I try and access the site I receive a “404 Not Found” page. I’m guessing the rewrite rules are not in effect, but have no clue how to make them work properly.

Any help is much appreciated!

By: Brad

Brad — Wed, 15 Aug 2007 17:54:15 +0000

I figured it out: there is a typo in this command:

mongrel_rails cluster::configure -p 8000 -n 3

The -n option is case sensitive. Use -N to set the number of servers. -n sets number of threads.

By: Brad

Brad — Wed, 15 Aug 2007 17:49:53 +0000

When I start my cluster as you describe, I only get responses on ports 8000 and 8001, not 8002 for some reason.

By: addame

addame — Sun, 15 Jul 2007 20:07:47 +0000

Hi!
Thanks a lot for this very instructive tutorial ! it helps me to get my small application up !

The only problem is when I tried to lunch mongrel_cluster, where I have problem.
In fact the mongrel_rails start -e production is working fine. However mongrel_rails cluster::start is not working. The log I get the following output :

starting port 8000
starting port 8001
starting port 8002

But when I lunched the browser to the application url and port 8000 for
example, the mongrels seems not working.

I looked at the log file and get for the first mongrel instance :

** Daemonized, any open files are closed. Look at tmp/mongrel.8000.pid
and log/mongrel.8000.log for info.
** Starting Mongrel listening at 0.0.0.0:8000
** Changing group to mongrel.
** Changing user to mongrel.
** Starting Rails with production environment…
** Mounting Rails at /home/rails/projects/myapps…
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:30:in
`gem_original_require’: no such file to load –
/home/rails/projects/jokes/config/environment (LoadError)
from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:30:in
`require’
from
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/rails.rb:157:in
`rails’
from
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/bin/mongrel_rails:116:in
`cloaker_’
from
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/configurator.rb:138:in
`call’
from
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/configurator.rb:138:in
`listener’
from
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/bin/mongrel_rails:98:in
`cloaker_’
from
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/configurator.rb:51:in
`call’
from
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/configurator.rb:51:in
`initialize’
from
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/bin/mongrel_rails:83:in `new’
from
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/bin/mongrel_rails:83:in `run’
from
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/command.rb:211:in
`run’
from /usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/bin/mongrel_rails:248
from /usr/bin/mongrel_rails:16:in `load’
from /usr/bin/mongrel_rails:16

It’s the same thing for the two other instances.

My mongrel cluster configuration is as follows :

user: mongrel
group: mongrel
cwd: /home/rails/projects/myapps
log_file: log/mongrel.log
port: “8000″
environment: production
address: 127.0.0.1
pid_file: tmp/mongrel.pid
servers: 3

Do you have any idea of this problem ?

Thanks in advance !!

Addam

By: peter retief

peter retief — Mon, 02 Jul 2007 07:44:33 +0000

I did the “Start Mongrel Cluster on Boot” a bit different - see link

http://pieter-mantis.blogspot.com/2007/07/start-mongrel-cluster-on-boot-ubuntu.html

By: peter retief

peter retief — Mon, 02 Jul 2007 07:41:52 +0000

I did the “Start Mongrel Cluster on Boot” a bit different - see link