[cells v2 multicell] nova metadata api per cell

Bug #1823760 reported by Martin Schuppert on 2019-04-08
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
tripleo
Undecided
Martin Schuppert

Bug Description

Nova Metadata API service
Starting from the Stein release, the Nova Metadata API service can be run either globally or per cell using the api.local_metadata_per_cell configuration option.

Global

If you have networks that span cells, you might need to run Nova metadata API globally. When running globally, it should be configured as an API-level service with access to the api_database.connection information. The nova metadata API service must not be run as a standalone service in this case (e.g. must not be run via the nova-api-metadata script).

Local per cell

Running Nova metadata API per cell can have better performance and data isolation in a muli-cell deployment. If your networks are segmented along cell boundaries, then you can run Nova metadata API service per cell. If you choose to run it per cell, you should also configure each Neutron metadata-agent to point to the corresponding nova-metadata-api. The nova metadata API service must be run as a standalone service in this case (e.g. must be run via the nova-api-metadata script).

[1] https://docs.openstack.org/nova/latest/user/cellsv2-layout.html#nova-metadata-api-service

This is to track nova metadata api per cell in tripleo

Changed in tripleo:
assignee: nobody → Martin Schuppert (mschuppert)
status: New → In Progress
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