feat(appserver): Switched default appserver from unicorn to puma

BREAKING CHANGE: Unicorn is no longer a default appserver, in favor of Puma. If you have a working
instances which were relying on that, you have to either set `app['appserver']['adapter'] =
'unicorn'` in your stack/layer JSON file, or switch the app server in your application

README.md

@@ -171,7 +171,7 @@ Configuration parameters for the ruby application server. Currently `Puma`,
 `Thin` and `Unicorn` are supported.
 
 * `app['appserver']['adapter']`
-  * **Default:** `unicorn`
+  * **Default:** `puma`
   * **Supported values:** `puma`, `thin`, `unicorn`, `null`
   * Server on the application side, which will receive requests from webserver
     in front. `null` means no appserver enabled.

attributes/default.rb

@@ -37,7 +37,7 @@
 # appserver
 ## common
 
-default['defaults']['appserver']['adapter'] = 'unicorn'
+default['defaults']['appserver']['adapter'] = 'puma'
 default['defaults']['appserver']['application_yml'] = false
 default['defaults']['appserver']['dot_env'] = false
 default['defaults']['appserver']['preload_app'] = true
@@ -51,6 +51,7 @@
 default['defaults']['appserver']['thread_max'] = 16
 
 ## thin
+
 default['defaults']['appserver']['max_connections'] = 1024
 default['defaults']['appserver']['max_persistent_connections'] = 512
 

spec/unit/recipes/deploy_spec.rb

@@ -131,7 +131,7 @@
       solo_node.set['deploy'] = { 'a1' => {}, 'a2' => {} }
       solo_node.set['applications'] = ['a1']
     end.converge(described_recipe)
-    service_a1 = chef_run.service('unicorn_a1')
+    service_a1 = chef_run.service('puma_a1')
 
     expect(chef_run).to create_directory('/srv/www/a1/shared')
     expect(chef_run).to create_directory('/srv/www/a1/shared/config')
@@ -141,8 +141,8 @@
     expect(chef_run).to create_directory('/srv/www/a1/shared/sockets')
     expect(chef_run).to create_directory('/srv/www/a1/shared/vendor/bundle')
     expect(chef_run).to create_template('/srv/www/a1/shared/config/database.yml')
-    expect(chef_run).to create_template('/srv/www/a1/shared/config/unicorn.conf')
-    expect(chef_run).to create_template('/srv/www/a1/shared/scripts/unicorn.service')
+    expect(chef_run).to create_template('/srv/www/a1/shared/config/puma.rb')
+    expect(chef_run).to create_template('/srv/www/a1/shared/scripts/puma.service')
     expect(chef_run).to create_template('/etc/nginx/sites-available/a1.conf')
     expect(chef_run).to create_link('/etc/nginx/sites-enabled/a1.conf')
     expect(service_a1).to do_nothing