Difference between revisions of "Nova-Cells-v2"
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** Original regression is reverted: https://review.openstack.org/#/c/457097/ | ** Original regression is reverted: https://review.openstack.org/#/c/457097/ | ||
** TODO(dansmith) to provide a proper fix | ** TODO(dansmith) to provide a proper fix | ||
| + | |||
| + | === Blueprints === | ||
| + | |||
| + | These are all currently targeted for the Pike release. | ||
| + | |||
| + | * https://blueprints.launchpad.net/nova/+spec/discover-hosts-faster | ||
| + | * https://blueprints.launchpad.net/nova/+spec/cells-aware-api | ||
| + | * https://blueprints.launchpad.net/nova/+spec/cells-count-resources-to-check-quota-in-api | ||
| + | * https://blueprints.launchpad.net/nova/+spec/list-instances-using-searchlight | ||
| + | * https://blueprints.launchpad.net/nova/+spec/service-hyper-uuid-in-api | ||
| + | * https://blueprints.launchpad.net/nova/+spec/convert-consoles-to-objects | ||
=== TODOs === | === TODOs === | ||
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=== Code Review === | === Code Review === | ||
| − | * | + | * See the cells v2 section in the Pike review priorities etherpad: https://etherpad.openstack.org/p/pike-nova-priorities-tracking |
| − | |||
| − | |||
=== References === | === References === | ||
Revision as of 17:08, 17 April 2017
Contents
Nova Cells v2
Bugs
- https://bugs.launchpad.net/openstack-manuals/+bug/1673616 - Scaling in Operations Guide - cells section needs to be updated
- https://bugs.launchpad.net/nova/+bug/1682060 - empty nova service and hypervisor list
- Fixed with a docs patch: https://review.openstack.org/#/c/456923/ (mriedem)
- https://bugs.launchpad.net/nova/+bug/1682693 - tags and not-tags cannot work properly
- Patch from Kevin Zheng: https://review.openstack.org/#/c/456872/ - needs to be backported to ocata and newton
- https://bugs.launchpad.net/trove/+bug/1682845 - nova's server group API returns deleted instances as members
- Original regression is reverted: https://review.openstack.org/#/c/457097/
- TODO(dansmith) to provide a proper fix
Blueprints
These are all currently targeted for the Pike release.
- https://blueprints.launchpad.net/nova/+spec/discover-hosts-faster
- https://blueprints.launchpad.net/nova/+spec/cells-aware-api
- https://blueprints.launchpad.net/nova/+spec/cells-count-resources-to-check-quota-in-api
- https://blueprints.launchpad.net/nova/+spec/list-instances-using-searchlight
- https://blueprints.launchpad.net/nova/+spec/service-hyper-uuid-in-api
- https://blueprints.launchpad.net/nova/+spec/convert-consoles-to-objects
TODOs
- Older tracking etherpads (these may be out of date):
Open Questions
- Should the computes self-register with a cell when the compute_nodes record is created from the ResourceTracker? https://review.openstack.org/#/c/369634/
- How would the computes know which cell to map to? We could add something to the model to flag a 'default' or 'staging' cell mapping, or put something into nova.conf on the compute node.
- If we auto-register into a default/staging cell, how do we move hosts to other cells? nova-manage CLI?
- We have an option to auto-map hosts from the scheduler since Ocata, with improvements being made in Pike: https://blueprints.launchpad.net/nova/+spec/discover-hosts-faster
Manifesto
http://docs.openstack.org/developer/nova/cells.html#manifesto
Testing
https://etherpad.openstack.org/p/nova-cells-testing
DB Table Analysis
https://etherpad.openstack.org/p/nova-cells-table-analysis
Scheduling requirements
https://etherpad.openstack.org/p/nova-cells-scheduling-requirements
Code Review
- See the cells v2 section in the Pike review priorities etherpad: https://etherpad.openstack.org/p/pike-nova-priorities-tracking
References
- Note the original cells wiki is here: https://wiki.openstack.org/wiki/Blueprint-nova-compute-cells
- Kilo design summit etherpad: https://etherpad.openstack.org/p/kilo-nova-cells
- nova-specs: https://review.openstack.org/#/q/status:open+project:openstack/nova-specs+branch:master+topic:bp/cells-instance-mapping,n,z
- Flow diagrams: http://paste.openstack.org/show/144068/
- https://etherpad.openstack.org/p/nova-cells-flow-diagram commentable version
