Learning OpenStack Networking - Third Edition

Enabling the metadata proxy

When Neutron routers are used as the gateway for instances, requests for metadata are proxied by the router rather than the DHCP server and are forwarded to the Nova metadata service. This feature is enabled by default and can be disabled by setting the enable_metadata_proxy value to False in the l3_agent.ini configuration file and uncommenting the line. For this environment, leave the setting at its default True value.

If the metadata proxy is disabled, users may only be able to obtain metadata using config-drive.