Initial implementation
Changes in the mechanism driver:
* Automatically create a port with device_owner=network:dhcp to
serve metadata and eventually DHCP.
* Auto-allocate an IP for the metadata port on subnet creation.
* Push static route for 169.254.169.254 in DHCP options.
* Wait until metadata service is provisioned in the chassis where
a port resides before sending the event to Nova.
Agent:
* Implementation of [0].
Devstack plugin:
* Starts networking-ovn-agent with the proper config files.
* Disables config drive in nova.conf for tempest against master
branch.
* Enables TEMPEST_RUN_VALIDATION for tempest against master branch.
In order to test this patch out we need to make these changes to
nova.conf:
* [DEFAULT] section:
force_config_drive = False
* [neutron] section:
service_metadata_proxy = True
This patch depends on [1] and [2] (already merged into OVS master).
NOTE: Metadata tests are only enabled for the non-voting tempest job
which runs against OVS master branch. The release job runs against
OVS 2.7 which doesn't include [1][2] so those tests are disabled
until OVS 2.8 is released.
[0]
https://docs.openstack.org/developer/networking-ovn/design/metadata_api.html
[1] https://patchwork.ozlabs.org/patch/767369/
[2] https://patchwork.ozlabs.org/patch/771297/
Change-Id: Ife2fd18f2f88050429e70c7e557fa41d2d54b034
Daniel Alvarez
ad1fea3e7b