Add heal_instance_info_cache_interval to nova.conf

This attribute is not currently a part of the cookbook template.
Adding this attribute will allow operators to configure this option
which can reduce unecessary neutron requests in non OVS or Linux
Bridge deployments.

Closes-Bug:1499551

Change-Id: Ibcf6b7bb614d629926b7d1f50ac552a9d1b1e670

attributes/default.rb

@@ -371,6 +371,7 @@ default['openstack']['compute']['config']['disk_allocation_ratio'] = 1.0
 default['openstack']['compute']['config']['snapshot_image_format'] = 'qcow2'
 default['openstack']['compute']['config']['allow_resize_to_same_host'] = false
 default['openstack']['compute']['config']['resize_confirm_window'] = 0
+default['openstack']['compute']['config']['heal_instance_info_cache_interval'] = 60
 default['openstack']['compute']['config']['reserved_host_disk_mb'] = 0
 default['openstack']['compute']['config']['reserved_host_memory_mb'] = 512
 # `start` will cause nova-compute to error out if a VM is already running, where

spec/nova-common_spec.rb

@@ -97,6 +97,11 @@ describe 'openstack-compute::nova-common' do
         end
       end
 
+      it 'has default heal_instance_info_cache_interval set' do
+        line = 'heal_instance_info_cache_interval=60'
+        expect(chef_run).to render_file(file.name).with_content(/^#{line}$/)
+      end
+
       it 'has default ssl options set' do
         %w(ssl_only=false
            cert=self.pem

templates/default/nova.conf.erb

@@ -185,6 +185,8 @@ start_guests_on_host_boot=<%= node["openstack"]["compute"]["config"]["start_gues
 resume_guests_state_on_host_boot=<%= node["openstack"]["compute"]["config"]["resume_guests_state_on_host_boot"] %>
 allow_resize_to_same_host=<%= node["openstack"]["compute"]["config"]["allow_resize_to_same_host"] %>
 resize_confirm_window=<%= node["openstack"]["compute"]["config"]["resize_confirm_window"] %>
+# (IntOpt) Number of seconds between instance network information cache updates.
+heal_instance_info_cache_interval=<%= node['openstack']['compute']['config']['heal_instance_info_cache_interval'] %>
 live_migration_retry_count=<%= node["openstack"]["compute"]["config"]["live_migration_retry_count"] %>
 
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