Facing your daemons

Ruby daemons are a PITA
 Tired of brittle daemons ?
 Tired of running blind ?
 Tired of setting up monitoring ?
 Tired of worrying about logging ?
 Tired of missing pid files ?

daemon­kit
http://github.com/kennethkalmer/daemon-kit
Kenneth Kalmer
@kennethkalmer
http://opensourcery.co.za

daemon­kit ?
 Opionated Framework for Ruby daemons
 Keep things DRY
 Generators to help make things simple
 Rake tasks to help keep things simple

Multiple environments
 Development
 Be noisy, break early, break hard
 Testing
 Staging
 Production
 Be quiet, stay alive, recover easily

Don't worry about pid files
 Managed for you
 Infered or explicit files
 Great for controlling clusters
 Handles stale pid files

Don't worry about logging
 Multiple levels
 Syslog support
 Log rotation friendly (HUP)

Don't worry about configuration
 Simple YAML config files
 On­demand hashes
 Environment­aware configuration
 Defaults and environment specific overrides

Don't worry about monitoring
 Generate monit/god configuration files via rake

Don't worry about silent death
 Safety nets for threads
 Hoptoad integration
 Exception emails
 Change logging levels with SIGUSR1/SIGUSER2

Generators accelarate
 AMQP consumer
 Nanite agent
 XMPP bot
 Cron daemon
 Ruote remote participants

 $ daemon_kit mydaemon ­i amqp

Easy deployment
 Custom capistrano recipe tailored for daemons
 Awaiting vlad contribution :)

 $ daemon_kit mydaemon ­d capistrano
 $ ./script/generate deploy_capistrano

Suitable for networking
 EventMachine is a dependency
 AMQP uses EM
 Scheduler uses EM
 XMPP to use EM (under construction)

Looking forward
 RobustThread support
 Bundled thread/fibre pool implementation
 Sys V Init script generation
 Bleakhouse support
 Privilege dropping & chroot'ing

Arigato gozaimasu !
 http://github.com/kennethkalmer/daemon­kit
 http://kit.rubyforge.org/daemon/rdoc
 #daemon­kit on Freenode

 http://opensourcery.co.za
 @kennethkalmer