Add osapi_compute_link_prefix to nova.conf

When a load balancer is used to terminate SSL, it generally
strips the https:// from the HTTP_HOST header and changes it
to http://. This is used by webob.Request as the request_url
that is then used by default when constructing link collections
in the OpenStack Compute API. Setting the osapi_compute_link_prefix
configuration option allows us to override the URI returned to
match the original compute endpoint URI.

recipes/nova-common.rb

@@ -131,7 +131,8 @@ template "/etc/nova/nova.conf" do
     :glance_api_ipaddress => image_endpoint.host,
     :glance_api_port => image_endpoint.port,
     :iscsi_helper => platform_options["iscsi_helper"],
-    :scheduler_default_filters => node["nova"]["scheduler"]["default_filters"].join(",")
+    :scheduler_default_filters => node["nova"]["scheduler"]["default_filters"].join(","),
+    :osapi_compute_link_prefix => nova_api_endpoint.to_s
   )
 end
 

templates/default/nova.conf.erb

@@ -98,6 +98,12 @@ memcached_servers=<%= @memcache_servers %>
 force_raw_images=<%= node["nova"]["config"]["force_raw_images"] %>
 allow_same_net_traffic=<%= node["nova"]["config"]["allow_same_net_traffic"] %>
 osapi_max_limit=<%= node["nova"]["config"]["osapi_max_limit"] %>
+# If you terminate SSL with a load balancer, the HTTP_HOST environ
+# variable that generates the request_uri in webob.Request will lack
+# the HTTPS scheme. Setting this overrides the default and allows
+# URIs returned in the various links collections to contain the proper
+# HTTPS endpoint.
+osapi_compute_link_prefix = <%= @osapi_compute_link_prefix %>
 snapshot_image_format=<%= node["nova"]["config"]["snapshot_image_format"] %>
 start_guests_on_host_boot=<%= node["nova"]["config"]["start_guests_on_host_boot"] %>
 resume_guests_state_on_host_boot=<%= node["nova"]["config"]["resume_guests_state_on_host_boot"] %>