Add metadata service support to controller node

The metadata service is working as the following:
- metadata is being served by nova-api on controller at port 8775.
- VM instance requests metadata by 169.254.169.254 (eg, curl http://169.254.169.254/latest/meta-data)
- metadata request comes to neutron-ns-metadata-proxy on controller in dhcp network name space.
- neutron-ns-metadata-proxy forwards the request to neutron-metadata-agent through a unix domain socket (/var/lib/neutron/metadata_proxy).
- neutron-metadata-agent sends the request to nova-api on port 8775 to be serviced.

To support metadata service, neutron-ns-metadata-proxy is baked into the controller image. Also neutron-metadata-agent startup script
(/etc/init.d/neutron-metadata-agent) and config file (/etc/neutron/metadata_agent.ini) are added to start up metadata agent at system
initialization. dhcp_agent.ini and nova.conf are updated as well.

A README.metadata is added in the Documentation/ directory.

Signed-off-by: Andy Ning <andy.ning@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/meta-openstack/recipes-devtools/python/python-nova/nova.conf b/meta-openstack/recipes-devtools/python/python-nova/nova.conf
index 35eed8b..fbaaa78 100644
--- a/meta-openstack/recipes-devtools/python/python-nova/nova.conf
+++ b/meta-openstack/recipes-devtools/python/python-nova/nova.conf
@@ -73,6 +73,12 @@ libvirt_images_rbd_ceph_conf=/etc/ceph/ceph.conf
 rbd_user=cinder-volume
 #rbd_secret_uuid=
 
+# nova-api configuration for metadata
+# neutron_metadata_proxy_shared_secret must match
+# metadata_proxy_shared_secret in metadata_agent.ini
+service_neutron_metadata_proxy = true
+neutron_metadata_proxy_shared_secret=%METADATA_SHARED_SECRET%
+
 [spice]
 agent_enabled=True
 enabled=True