# God 0.3.0 released **URL:** \ **Category:** Ruby\ **Created:** [August 20, 2007, 8:08pm UTC](https://www.ruby-forum.com/t/god-0-3-0-released/112546 "2007-08-20T20:08:59Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![tomfarm](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/b5ac83/32.png) [@tomfarm](https://www.ruby-forum.com/u/tomfarm)\ **Post date:** [August 20, 2007, 8:08pm UTC](https://www.ruby-forum.com/t/god-0-3-0-released/112546/1 "2007-08-20T20:08:59Z")
Plenty of big changes and improvements in this release of god. Most noticeable is a simplification of the config file. Sadly, we must say goodbye to the much loved God.meddle and promote God.watch to top level. This change allows you to easily load in other god config files and have them work as expected. There’s even a God.load that takes a glob-style file path string and expands it to load multiple files. PID file support is now baked in so you don’t have to set the pid\_file attribute on conditions anymore. This also allows god to support processes that aren’t already daemons. If you don’t specify a PID file for the watch, god will auto-daemonize and keep track of your process for you! To use this feature, you must either run as root (pid files will be stored by default in /var/run/god) or set the pid\_file\_directory attribute in a God.init block (see docs). For anyone that had problems installing the 0.2.0 release because of the events system not compiling, god 0.3.0 will now allow you to install without event support. Most systems are capable of supporting events, but it requires some dedication to get the headers in place and make sure your kernel is new enough. To determine if your god installation has event support you can run “sudo god -V” (this MUST be run as root on Linux, as netlink connector requires root permissions). Using the god binary you can now control your watches from the command line. You can start/stop/restart/monitor/unmonitor watches at your demand. New watch attributes now available: pid\_file: sets the watch process’ PID file location uid/gid: start processes as someone else (requires root access) group: assign a watch to a group (to control them all at once) autostart: prevent auto start on god start if false Updated documentation is now available on the website: [http://god.rubyforge.org/](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 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 - Easily control non-daemonized processes 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](http://gravatar.com) to keep the mongrels running: # file: gravatar.god # run with: god -c /path/to/gravatar.god # # This is the actual config file used to keep the mongrels of # [gravatar.com](http://gravatar.com) running. RAILS\_ROOT = “/var/www/gravatar2/current” %w{8200 8201 8202}.each do |port| God.watch do |w| w.name = “gravatar2-mongrel-#{port}” w.interval = 30.seconds # default 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 w.pid\_file = File.join(RAILS\_ROOT, “log/mongrel.#{port}.pid”) ``` w.behavior(:clean_pid_file) w.start_if do |start| start.condition(:process_running) do |c| c.interval = 5.seconds c.running = false end end w.restart_if do |restart| restart.condition(:memory_usage) do |c| c.above = 150.megabytes c.times = [3, 5] # 3 out of 5 intervals end restart.condition(:cpu_usage) do |c| c.above = 50.percent c.times = 5 end end ``` end end DOCS Detailed documentation is available at [http://god.rubyforge.org/](http://god.rubyforge.org/) CHANGES == 0.3.0 / 2007-08-17 - Fix netlink header problem on Ubuntu Edgy [Dan Sully] - Add uid/gid setting for processes [kevinclark] - Add autostart flag for watches so they don’t necessarily startup with god [kevinclark] - Change command line call options for god binary to accommodate watch start/stop functionality - Add individual start/stop/restart grace periods for finer grained control - Change default DRb port to 17165 (‘god’.to\_i(32)) - Implement command line control to start/restart/stop/monitor/unmonitor watches/groups by name - Watches can now belong to a group that can be controlled as a whole - Allow god to be installed (sans events) on systems that don’t support events - Daemonize and handle PID files for non-daemonizing scripts [kevinclark] - Fix simple mode lifecycle gap - Remove necessity to specify pid\_file for conditions - Change config file to use God.init and God.watch directly instead of God.meddle block - Move god binary command logic to main library - Enhance god binary with better reporting - Fix synchronization bug in Timer (reported by Srini Panguluri) - Add Lambda condition for easy custom conditions [Mike Mintz] - Add sugar for numerics (seconds, minutes, kilobytes, megabytes, percent, etc) - Add optional PID and log file generation to god binary for daemon mode - Add God.load to do glob enabled loading - Add -V option to god binary for detailed version/build info AUTHORS Tom Preston-Werner Kevin C. – Tom Preston-Werner - Libraries: Chronic ([chronic.rubyforge.org](http://chronic.rubyforge.org)) God ([god.rubyforge.org](http://god.rubyforge.org)) Fuzed ([fuzed.rubyforge.org](http://fuzed.rubyforge.org)) - Site: [rubyisawesome.com](http://rubyisawesome.com)