6369f39244
Tempest is intermittently failing a test which does the following: 1. Create a server. 2. Shelve offload it. 3. Unshelve it. Tempest waits for the server status to be SHELVED_OFFLOADED before unshelving the server, which goes through the scheduler to pick a compute node and claim resources on it. When shelve offloading a server, the resource allocations for the instance and compute node it was on are cleared, which will also delete the internal consumer record in the placement service. The race is that the allocations are removed during shelve offload *after* the server status changes to SHELVED_OFFLOADED. This leaves a window where unshelve is going through the scheduler and gets the existing allocations for the instance, which are non-empty and have a consumer generation. The claim_resources method in the scheduler then uses that consumer generation when PUTing the allocations. That PUT fails because in between the GET and PUT of the allocations, placement has deleted the internal consumer record. When PUTing the new allocations with a non-null consumer generation, placement returns a 409 conflict error because for a new consumer it expects the "consumer_generation" parameter to be None. This change handles the race by simply making sure the allocations are deleted (along with the related consumer record in placement) *before* the instance.vm_status is changed. Change-Id: I2a6ccaff904c1f0759d55feeeef0ec1da32c65df Closes-Bug: #1798688 |
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| .. | ||
| functional | ||
| live_migration/hooks | ||
| unit | ||
| __init__.py | ||
| fixtures.py | ||
| json_ref.py | ||