Run discover_hosts after computes are added, before running Tempest

Change-Id: If1b300bdb4e1d9a5e1be2361c29816d75d368b91

recipes/setup.rb

@@ -165,6 +165,9 @@ end
 # merge all config options and secrets to be used in the nova.conf.erb
 integration_test_conf_options = merge_config_options 'integration-test'
 
+nova_user = node['openstack']['compute']['user']
+nova_group = node['openstack']['compute']['group']
+
 # create the keystone.conf from attributes
 template '/opt/tempest/etc/tempest.conf' do
   source 'openstack-service.conf.erb'
@@ -184,6 +187,14 @@ directory '/opt/tempest/logs' do
   action :create
 end
 
+# execute discover_hosts again before running tempest
+execute 'discover_hosts' do
+  user nova_user
+  group nova_group
+  command 'nova-manage cell_v2 discover_hosts'
+  action :run
+end
+
 # delete all secrets saved in the attribute
 # node['openstack']['identity']['conf_secrets'] after creating the keystone.conf
 ruby_block "delete all attributes in node['openstack']['integration-test']['conf_secrets']" do

spec/setup_spec.rb

@@ -162,6 +162,12 @@ describe 'openstack-integration-test::setup' do
           'uri_v3 = http://127.0.0.1:5000/v3'
         )
       end
+
+      it 'discovers compute hosts' do
+        expect(chef_run).to run_execute('discover_hosts')
+          .with(user: 'nova',
+                group: 'nova')
+      end
     end
 
     describe 'tempest.conf with HTTPS' do