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, 1 insertions, 0 deletions

diff --git a/meta-openstack/classes/identity.bbclass b/meta-openstack/classes/identity.bbclass
index d1eb276..70191a5 100644
--- a/meta-openstack/classes/identity.bbclass
+++ b/meta-openstack/classes/identity.bbclass
@@ -4,3 +4,4 @@ SERVICE_PASSWORD = "password"
 SERVICE_TENANT_NAME = "service"
 DB_USER = "admin"
 DB_PASSWORD = "admin"
+METADATA_SHARED_SECRET = "password"