Use workers instead of threads in wsgi by default

In most of puppet-openstack modules, we use workers instead of threads
in wsgi to realize concurrency of api process by default.

This patch makes puppet-watcher follow that standard configuration,
so that the default setup can be more consistent among all modules.

Change-Id: Iac7cba33f69b39e5bf29c61ed0c22b9b533b1293

manifests/wsgi/apache.pp

@@ -42,7 +42,7 @@
 #
 #   [*workers*]
 #     Number of WSGI workers to spawn.
-#     Optional. Defaults to 1
+#     Optional. Defaults to $::os_workers
 #
 #   [*priority*]
 #     (optional) The priority for the vhost.
@@ -50,7 +50,7 @@
 #
 #   [*threads*]
 #     (optional) The number of threads for the vhost.
-#     Defaults to $::os_workers
+#     Defaults to 1
 #
 #   [*access_log_file*]
 #     The log file name for the virtualhost.
@@ -102,7 +102,7 @@ class watcher::wsgi::apache (
   $bind_host                   = undef,
   $path                        = '/',
   $ssl                         = true,
-  $workers                     = 1,
+  $workers                     = $::os_workers,
   $ssl_cert                    = undef,
   $ssl_key                     = undef,
   $ssl_chain                   = undef,
@@ -111,7 +111,7 @@ class watcher::wsgi::apache (
   $ssl_crl                     = undef,
   $ssl_certs_dir               = undef,
   $wsgi_process_display_name   = undef,
-  $threads                     = $::os_workers,
+  $threads                     = 1,
   $priority                    = '10',
   $access_log_file             = false,
   $access_log_format           = false,

releasenotes/notes/wsgi-use-workers-02a0232bf3aac3fe.yaml

@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    In wsgi configuration, now workers is used to define concurrency by default
+    instead of threads, to be consistent with the other puppet modules.

spec/classes/watcher_wsgi_apache_spec.rb

@@ -14,9 +14,9 @@ describe 'watcher::wsgi::apache' do
         :path                        => '/',
         :servername                  => facts[:fqdn],
         :ssl                         => true,
-        :threads                     => facts[:os_workers],
+        :threads                     => 1,
         :user                        => 'watcher',
-        :workers                     => 1,
+        :workers                     => facts[:os_workers],
         :wsgi_daemon_process         => 'watcher',
         :wsgi_process_group          => 'watcher',
         :wsgi_script_dir             => platform_params[:wsgi_script_path],
@@ -56,7 +56,7 @@ describe 'watcher::wsgi::apache' do
         :path                        => '/',
         :servername                  => 'dummy.host',
         :ssl                         => false,
-        :threads                     => facts[:os_workers],
+        :threads                     => 1,
         :user                        => 'watcher',
         :workers                     => 37,
         :wsgi_daemon_process         => 'watcher',