T
Tom Werner
I'm proud to announce the initial public release of god!
http://god.rubyforge.org/
WHAT IS GOD?
God is an easy to configure, easy to extend monitoring framework written
in Ruby.
Keeping your server processes and tasks running should be a simple part
of your deployment process. God aims to be the simplest, most powerful
monitoring application available.
DISCLAIMER
God is still very young, I'd love to get feedback and bug reports, but I
do not yet recommend you use it for mission critical tasks. I personally
use it in production but then I'm a daring fellow.
INSTALL
sudo gem install god
* note: currently tested only on Redhat Linux and Darwin (won't work on
Windows)
FEATURES
* Config file is written in Ruby
* Easily write your own custom conditions in Ruby
* Supports both poll and event based conditions
* Different poll conditions can have different intervals
EXAMPLE
The easiest way to understand how god will make your life better is by
looking at a sample config file. The following configuration file is
what I use at gravatar.com to keep the mongrels running:
# file: gravatar.god
# run with: god start -c /path/to/gravatar.god
#
# This is the actual config file used to keep the mongrels of
# gravatar.com running.
RAILS_ROOT = "/var/www/gravatar2/current"
God.meddle do |god|
%w{8200 8201 8202}.each do |port|
god.watch do |w|
w.name = "gravatar2-mongrel-#{port}"
w.interval = 30 # seconds
w.start = "mongrel_rails cluster::start --only #{port} \
-C #{RAILS_ROOT}/config/mongrel_cluster.yml"
w.stop = "mongrel_rails cluster::stop --only #{port} \
-C #{RAILS_ROOT}/config/mongrel_cluster.yml"
w.grace = 10 # seconds
pid_file = File.join(RAILS_ROOT, "log/mongrel.#{port}.pid")
w.behavior
clean_pid_file) do |b|
b.pid_file = pid_file
end
w.start_if do |start|
start.conditionprocess_not_running) do |c|
c.interval = 5 # seconds
c.pid_file = pid_file
end
end
w.restart_if do |restart|
restart.conditionmemory_usage) do |c|
c.pid_file = pid_file
c.above = (150 * 1024) # 150mb
c.times = [3, 5] # 3 out of 5 intervals
end
restart.conditioncpu_usage) do |c|
c.pid_file = pid_file
c.above = 50 # percent
c.times = 5
end
end
end
end
end
DOCS
Detailed documentation is available at http://god.rubyforge.org/
CHANGES
== 0.1.0 / 2007-07-07
* 1 major enhancement
* Birthday!
AUTHOR
Tom Preston-Werner
http://god.rubyforge.org/
WHAT IS GOD?
God is an easy to configure, easy to extend monitoring framework written
in Ruby.
Keeping your server processes and tasks running should be a simple part
of your deployment process. God aims to be the simplest, most powerful
monitoring application available.
DISCLAIMER
God is still very young, I'd love to get feedback and bug reports, but I
do not yet recommend you use it for mission critical tasks. I personally
use it in production but then I'm a daring fellow.
INSTALL
sudo gem install god
* note: currently tested only on Redhat Linux and Darwin (won't work on
Windows)
FEATURES
* Config file is written in Ruby
* Easily write your own custom conditions in Ruby
* Supports both poll and event based conditions
* Different poll conditions can have different intervals
EXAMPLE
The easiest way to understand how god will make your life better is by
looking at a sample config file. The following configuration file is
what I use at gravatar.com to keep the mongrels running:
# file: gravatar.god
# run with: god start -c /path/to/gravatar.god
#
# This is the actual config file used to keep the mongrels of
# gravatar.com running.
RAILS_ROOT = "/var/www/gravatar2/current"
God.meddle do |god|
%w{8200 8201 8202}.each do |port|
god.watch do |w|
w.name = "gravatar2-mongrel-#{port}"
w.interval = 30 # seconds
w.start = "mongrel_rails cluster::start --only #{port} \
-C #{RAILS_ROOT}/config/mongrel_cluster.yml"
w.stop = "mongrel_rails cluster::stop --only #{port} \
-C #{RAILS_ROOT}/config/mongrel_cluster.yml"
w.grace = 10 # seconds
pid_file = File.join(RAILS_ROOT, "log/mongrel.#{port}.pid")
w.behavior
clean_pid_file) do |b|b.pid_file = pid_file
end
w.start_if do |start|
start.condition
process_not_running) do |c|c.interval = 5 # seconds
c.pid_file = pid_file
end
end
w.restart_if do |restart|
restart.condition
memory_usage) do |c|c.pid_file = pid_file
c.above = (150 * 1024) # 150mb
c.times = [3, 5] # 3 out of 5 intervals
end
restart.condition
cpu_usage) do |c|c.pid_file = pid_file
c.above = 50 # percent
c.times = 5
end
end
end
end
end
DOCS
Detailed documentation is available at http://god.rubyforge.org/
CHANGES
== 0.1.0 / 2007-07-07
* 1 major enhancement
* Birthday!
AUTHOR
Tom Preston-Werner