Simplify roles a bit

We now have an attribute that helps us know when a node is a founder or
not. The end goal will be to get rid of the founder role and have the
wrapper (for instance, crowbar) set this attribute on one node.

This also allows installing pacemaker before corosync, avoiding issues
where corosync doesn't know about pacemaker.

attributes/default.rb

@@ -27,4 +27,5 @@ else
   return
 end
 
+default[:pacemaker][:founder] = false
 default[:pacemaker][:crm][:initial_config_file] = "/etc/corosync/crm-initial.conf"

metadata.rb

@@ -5,3 +5,5 @@ license          "Apache 2.0"
 description      "Installs/configures Pacemaker"
 long_description IO.read(File.join(File.dirname(__FILE__), 'README.md'))
 version          "0.1"
+
+depends "corosync"

recipes/default.rb

@@ -18,4 +18,12 @@
 # limitations under the License.
 #
 
-include_recipe "pacemaker::setup"
+if Chef::Config[:solo]
+  ::Chef::Log.warn "Using Chef Solo, you are expected to manually include the corosync default recipe!"
+else
+  include_recipe "corosync::default"
+end
+
+if node[:pacemaker][:founder]
+  include_recipe "pacemaker::setup"
+end