[COOK-3851] Allow config file change notification type to be specifie…

…d by attribute, defaulting to :restart

Signed-off-by: Sean OMeara <someara@opscode.com>

README.md

@@ -46,6 +46,8 @@ The following attributes are set based on the platform, see the
   that should be installed on "client" systems.
 * `node['postgresql']['server']['packages']` - An array of package names
   that should be installed on "server" systems.
+* `node['postgresql']['server']['config_change_notify']` - Type of
+  notification triggered when a config file changes.
 * `node['postgresql']['contrib']['packages']` - An array of package names
   that could be installed on "server" systems for useful sysadmin tools.
 
@@ -400,6 +402,12 @@ certificates and distribute them in your own cookbook, and set the
 `node['postgresql']['config']['ssl']` attribute to true in your
 role/cookboook/node.
 
+On server systems, the postgres server is restarted when a configuration
+file changes.  This can be changed to reload only by setting the
+following attribute:
+
+    node['postgresql']['server']['config_change_notify'] = :reload
+
 Chef Solo Note
 ==============
 

attributes/default.rb

@@ -18,6 +18,7 @@
 #
 
 default['postgresql']['enable_pgdg_apt'] = false
+default['postgresql']['server']['config_change_notify'] = :restart
 
 case node['platform']
 when "debian"

recipes/server.rb

@@ -57,20 +57,22 @@
   include_recipe "postgresql::server_debian"
 end
 
+change_notify = node['postgresql']['server']['config_change_notify']
+
 template "#{node['postgresql']['dir']}/postgresql.conf" do
   source "postgresql.conf.erb"
   owner "postgres"
   group "postgres"
-  mode 0644
-  notifies :reload, 'service[postgresql]', :immediately
+  mode 0600
+  notifies change_notify, 'service[postgresql]', :immediately
 end
 
 template "#{node['postgresql']['dir']}/pg_hba.conf" do
   source "pg_hba.conf.erb"
   owner "postgres"
   group "postgres"
   mode 00600
-  notifies :reload, 'service[postgresql]', :immediately
+  notifies change_notify, 'service[postgresql]', :immediately
 end
 
 # NOTE: Consider two facts before modifying "assign-postgres-password":