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README.md

Recipes for deploying Appiphany apps.

There are several recipes for each part of the app. First add this gem to the Gemfile and then to the deploy.rb file like so:

require 'appiphany/capistrano/base' # Always start with this one
require 'appiphany/capistrano/LIBRARY'

Available libraries are after the "Base recipes" below.

Base recipes

This is the default configuration:

  default_environment['PATH'] = '/opt/rbenv/shims:/opt/rbenv/bin:$PATH'

  set :use_sudo, false

  set :scm, 'git'

  set(:appdir)     { "/home/#{user}/#{application}" }
  set :branch,     'master'
  set :deploy_via, 'remote_cache'

  set(:deploy_to) { appdir }

  default_run_options[:pty]   = true
  ssh_options[:forward_agent] = true

All of these can be overriden in the deploy.rb file.

If the remote file #{shared_path}/config/database.yml exists, then it will be linked to #{release_path}/config/database.yml after updating the code.

After deploy:setup the following actions will be performed:

  • Create #{shared_path}/config
  • Link the log directory to the main log directory on `/home/#{user}/logs/#{application}
  • If a config/database.example.yml exists, you will be prompted for values to create a real production database.yml file.

Usign rbenv

If a .rbenv_version file exists in the app's root, it will be linked inside the /home/#{user}/#{application} directory so when you SSH into the server, all the commands run in that tree use the proper Ruby version.

God (god)

God is used to manage services used by an app, including the web server.

  • god:quit stops the god daemon without stopping any monitored services.
  • god:start starts the god daemon and starts services as needed.
  • god:restart_all restarts all of the apps services.
  • god:restart SERVICE=name restarts just the named service.

An app's god config file lives in config/deploy/#{application}.god. This file will be linked to /etc/god/config.d/#{application}.god so the daemon picks up the configuration.

After a deploy, the god daemon will be restarted (so it picks up any changes in the config file), and then all the app's services will be restarted.

Here's a template for the config file with example monitors for the web server, sphinx, and resque:

app = 'APP_NAME'

default = DefaultConfig.new(root: "/home/ubuntu/#{app}")

God.watch do |w|
  name = app + '-web'

  default.with(w, name: name, group: app)

  w.start    = default.bundle_cmd "passenger start -d -S /tmp/#{app}-passenger.sock -e production"
  w.pid_file = "#{default[:root]}/shared/pids/passenger.pid"
end

God.watch do |w|
  name = app + '-sphinx'

  default.with(w, name: name, group: app)

  w.start    = default.bundle_cmd 'rake ts:start'
  w.pid_file = "#{default[:root]}/shared/log/searchd.#{default[:rails_env]}.pid"
  w.log      = "#{default[:root]}/shared/log/god-sphinx.log"
end

God.watch do |w|
  name = app + '-worker'

  default.with(w, name: name, group: app, env: { 'QUEUE' => app })

  w.start = default.bundle_cmd 'rake environment resque:work'
  w.log   = "#{default[:root]}/shared/log/god-worker.log"
end