From: Jamis Buck <jamis@37signals.com>
Date: 2006-02-21T14:16:05+09:00
Subject: [ANN] SwitchTower 1.0.1, SwitchTower Extensions

SwitchTower is a utility that can execute commands in parallel on   
multiple servers. It allows you to define tasks, which can include  
commands that are executed on the servers. You can also define roles  
for your servers, and then specify that certain tasks apply only to  
certain roles.

    Manual: http://manuals.rubyonrails.org/read/book/17
    Project: http://rubyforge.org/projects/switchtower
    Install: gem install switchtower

SwitchTower 1.0.1, coming hard on the heels of 1.0.0, fixes the  
broken rakefile that was generated for rails applications. Nothing  
else was changed.

In addition to SwitchTower 1.0.1, I'd also like to announce  
SwitchTower Extensions 1.0.0, a collection of SwitchTower tasks and  
methods for use in your own SwitchTower recipes. There are two tasks  
provided by this library:

* watch_load. Just run "switchtower -r config/deploy -a watch_load"  
and you'll see a display of the current load (1/5/15) for each of  
your servers. The display updates every 30 seconds.

* watch_requests. Run "switchtower -r config/deploy -a  
watch_requests" and you'll see a display of the current requests/ 
second of each of your application servers, as harvested from your  
application log, in real-time.

Mostly, this library is provided as an example of how to write  
SwitchTower extensions, though some may find the tasks themselves  
useful. You can install SwitchTower extensions either by downloading  
from http://rubyforge.org/projects/switchtower, or by rubygems (gem  
install switchtower-ext). Once installed, you simply need to put  
"require 'switchtower/ext/monitor'" in your deploy.rb and the tasks  
will be available to you.

- Jamis