Merge pull request #3 from consolo/monit

Add support for monit

README.md

@@ -25,6 +25,8 @@ Or install it yourself as:
 # Capfile
 
 require 'capistrano/sneakers'
+# Include monit tasks
+# require 'capistrano/sneakers/monit'
 ```
 
 ## Contributors

lib/capistrano/sneakers/monit.rb

+# Load monit tasks
+load File.expand_path('../../tasks/monit.rake', __FILE__)

lib/capistrano/tasks/monit.rake

+namespace :load do
+  task :defaults do
+    set :sneakers_monit_conf_dir, -> { "/etc/monit/conf.d/#{sneakers_monit_service_name}.conf" }
+    set :sneakers_monit_use_sudo, true
+    set :sneakers_monit_bin, '/usr/bin/monit'
+  end
+end
+
+namespace :sneakers do
+  namespace :monit do
+    desc 'Add Sneakers to monit'
+    task :config do
+      on roles(fetch(:sneakers_role)) do |role|
+        @role = role
+        template_sneakers 'sneakers_monit.conf', "#{fetch(:tmp_dir)}/monit.conf", @role
+        sudo_if_needed "mv #{fetch(:tmp_dir)}/monit.conf #{fetch(:sneakers_monit_conf_dir)}"
+        sudo_if_needed "#{fetch(:sneakers_monit_bin)} reload"
+      end
+    end
+
+    desc 'Enable Sneakers monit'
+    task :monitor do
+      on roles(fetch(:sneakers_role)) do
+        sudo_if_needed "#{fetch(:sneakers_monit_bin)} monitor #{sneakers_monit_service_name}"
+      end
+    end
+
+    desc 'Disable Sneakers monit'
+    task :unmonitor do
+      on roles(fetch(:sneakers_role)) do
+        sudo_if_needed "#{fetch(:sneakers_monit_bin)} unmonitor #{sneakers_monit_service_name}"
+      end
+    end
+
+    desc 'Start Sneakers through monit'
+    task :start do
+      on roles(fetch(:sneakers_role)) do
+        sudo_if_needed "#{fetch(:sneakers_monit_bin)} start #{sneakers_monit_service_name}"
+      end
+    end
+
+    desc 'Stop Sneakers through monit'
+    task :stop do
+      on roles(fetch(:sneakers_role)) do
+        sudo_if_needed "#{fetch(:sneakers_monit_bin)}  stop #{sneakers_monit_service_name}"
+      end
+    end
+
+    desc 'Restart Sneakers through monit'
+    task :restart do
+      on roles(fetch(:sneakers_role)) do
+        sudo_if_needed "#{fetch(:sneakers_monit_bin)} restart #{sneakers_monit_service_name}"
+      end
+    end
+
+    before 'deploy:updating', 'sneakers:monit:unmonitor'
+    after 'deploy:published', 'sneakers:monit:monitor'
+
+    def sneakers_monit_service_name
+      fetch(:sneakers_monit_service_name, "sneakers_#{fetch(:application)}_#{fetch(:stage)}")
+    end
+
+    def sudo_if_needed(command)
+      fetch(:sneakers_monit_use_sudo) ? sudo(command) : execute(command)
+    end
+  end
+end

lib/capistrano/templates/sneakers_monit.conf.erb

+# Monit configuration for Sneakers
+# Service name: <%= sneakers_monit_service_name %>
+#
+check process <%= sneakers_monit_service_name %>
+  with pidfile "<%= fetch(:sneakers_pid) %>"
+  start program = "/usr/bin/sudo -iu <%= sneakers_user(@role) %> /bin/bash -c 'cd <%= current_path %> && RAILS_ENV=<%= fetch(:sneakers_env) %> WORKERS=<%= fetch(:sneakers_workers).join(',') %> <%= SSHKit.config.command_map[:rake] %> sneakers:run'"
+  stop program = "/usr/bin/sudo -iu <%= sneakers_user(@role) %> /bin/bash -c 'kill -SIGTERM `cat <%= fetch(:sneakers_pid) %>`'"