f0b8204072
As discussed at our nova meetings, reorganize the juno specs into three directories: - proposed: things proposed which weren't approved - approved: things we approved but didn't implement - implemented: things approved and implemented The first I suspect is the most controversial. I've done this because I worry about the case where a future developer wants to pick up something dropped by a previous developer, but has trouble finding previous proposed specifications on the topic. Note that the actual proposed specs for Juno are adding in a later commit. Change-Id: Idcf55ca37a83d7098dcb7c2971240c4e8fd23dc8
2.7 KiB
Add hook for update_instance_cache_with_nw_info
https://blueprints.launchpad.net/nova/+spec/instance-network-info-hook
A hook of the update_instance_cache_with_nw_info call will allow hooks access to valuable network information as soon as it becomes available. This will be useful for sending this data to scripts that can make informed tweaks to the networking on hosts.
Problem description
Right now there is no way to hook into the updating of network info.
Usecase: * Deployer would be able to register a hook to send networking information to a script that could make informed tweaks to networking on hosts. This might include flows or QoS.
Proposed change
Add a hook to the update_instance_cache_with_nw_info call to allow hooks access to this information.
Alternatives
This information is stored in the database, and could be accessed from there. But, this would require giving access to the database to outside applications and could potentitally increase load on the database.
Data model impact
None
REST API impact
None
Security impact
None
Notifications impact
None
Other end user impact
None
Performance Impact
The new code itself will not introduce any performance impact, but due to the nature of hooks, any deployer introduced hooks could have a performance impact. It will be up to the deployer to test their hooks for performance impact.
Other deployer impact
This change will introduce a new location for hooks. It will not immediately effect a deployment, as new hooks would need to be introduced that would take advantage of this new hook location.
Developer impact
None
Implementation
Assignee(s)
- Primary assignee:
-
andrew-melton
- Other contributors:
-
None
Work Items
- Register a new hook for update_instance_cache_with_nw_info
Dependencies
None
Testing
Unit testing to verify that you can register a hook for update_instance_cache_with_nw_info should be sufficient. The functional testing of the actual hooks should be left to the deployer.
Documentation Impact
If there is a list of hook locations, it will need to be updated to include this new location.
References
- Dev docs on nova hooks: http://docs.openstack.org/developer/nova/devref/hooks.html