Capistrano - Speaker Deck

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Stefan Husch

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‣ Inhaber ‚qutic development‘ : Beratung, Entwicklung und Hosting ‣ Software-Entwicklung seit 1983 ‣ Start mit Basic und Assembler auf dem C64 ‣ Seit 1993 MacOS, ab 2000 MacOS X: C, Objective-C ‣ Web-Entwicklung mit Ruby (On Rails) seit Ende 2005

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Introducing SwitchTower Posted by Jamis Buck on August 05, 2005 @ 05:43 PM

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SwitchTower: Renamed Posted by Jamis Buck on March 05, 2006 @ 05:49 PM

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Capistrano

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Application Deployment Tool

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geschrieben in Ruby

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mit einer einfachen DSL für die Konﬁguration

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zur Ausführung auf der Kommandozeile

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cap deploy

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... und Capistrano macht das Heavy Lifting :-)

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‣ Applikation aus scm auschecken und auf Server kopieren ‣ Wartungsseite schalten ‣ Hintergrund-Prozesse beenden ‣ fehlende Bibliotheken nachinstallieren ‣ Datenbank migrieren ‣ Ordner in Projekt hineinlinken (ﬁles, logs, etc) ‣ Hintergrund-Prozesse wieder starten ‣ Memcache-Instanz zurücksetzen (ﬂush_all) ‣ Sphinx-Datenbank indizieren und Prozess neu starten ‣ Applikation neu starten ‣ Wartungsseite entfernen ‣ Alte Deployments entfernen

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Einfache Installation

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nur auf dem Deployment-Rechner!

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gem install capistrano cd /mein/projekt capify . nano config/deploy.rb

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set :location, "radiantmagic.com" set :user, "radiantic" set :port, 10900 set :use_sudo, false set :application, "radiantic" set :scm, :git set :repository, "git@mein-git-srv:radiantic.git" set :branch, "master" set :deploy_via, :rsync_with_remote_cache set :deploy_to, "/export/home/#{user}/www/#{application}"

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Ausführung über SSH

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mit Ruby >= 1.9 auch parallel

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Und wenn etwas schief geht?

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cap deploy:rollback

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Spezielle Ordner-Struktur

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radiantic current -> releases/20130609164855 releases 20130608155124 20130609164855 shared config database.yml log production.log sphinx files

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desc "Migrate database" task :migrate, :roles => :db do run "cd '#{current_path}' && /rake db:migrate" end desc "Delete cache" task :cache_clear, :roles => :worker do delete "#{shared_path}/tmp/cache", :recursive => true end desc "Restart application" task :restart, :roles => :app do run "touch '#{current_path}/tmp/restart.txt'" end desc "Restart Webserver" task :restart_webserver, :roles => : app do sudo "/etc/init.d/apache2 restart" end

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Namespaces

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namespace :dj do desc "Start delayed_job backgound worker" task :start, :roles => :worker do run "'#{current_path}/script/delayed_job' start -n 4" end desc "Stop delayed_job backgound worker" task :stop, :roles => :worker do run "'#{current_path}/script/delayed_job' stop" end desc "Restart delayed_job backgound worker" task :restart, :roles => :worker do stop start end end

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Callbacks

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before "deploy:update_code", "deploy:dj:stop" before "deploy:restart", "deploy:bundle" after "deploy:bundle", "deploy:migrate" after "deploy:migrate", "deploy:cache_clear"

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Rollen

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role :app, "web1.example.com", "web2.example.com" role :web, "web1.example.com", "web2.example.com" role :db, "web1.example.com", :primary => true role :worker, "web2.example.com"

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Multistage

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Erweiterbar

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No content

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GUI

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Webistrano

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a Web UI for managing Capistrano deployment

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Harrow.io

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SaaS für Deployment?

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there is one more thing...

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cap shell

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Orchestration

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task "puppet:stop" task "puppet:start" task "puppet:restart" task "zone:stop" task "zone:start" task "zone:restart" task "db:switch_master" task "db:switch_proxy"

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Quellen ‣ https://github.com/capistrano/capistrano ‣ http://de.wikipedia.org/wiki/Capistrano_(Software) ‣ http://www.capistranorb.com ‣ http://weblog.jamisbuck.org/2005/8/5/introducing-switchtower ‣ http://weblog.jamisbuck.org/2006/3/6/switchtower-renamed ‣ https://github.com/peritor/webistrano ‣ https://www.harrow.io ‣ http://stackoverﬂow.com/questions/tagged/capistrano