Comment 4 for bug 1921934

Hi,

From the log, it seems nova schedule not filter a suitable host (AvailabilityZoneFilter not pass) to meet the resize requirement, then resize could not be done!
Please double check your test set up again. No other issue found.

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2021-03-30T14:41:39.527463748Z stdout F 2021-03-30 14:41:39.526 1 WARNING nova.scheduler.utils [req-3a563ed4-326d-4749-b5c3-723a67bb5629 10e13e496c894457acefa5a56809ab24 acc51db1f44d42dcb18313535a45f97f - default default] Failed to compute_task_migrate_server: No valid host was found. There are not enough hosts available.

2021-03-30T14:41:39.051276934Z stdout F 2021-03-30 14:41:39.051 1 INFO nova.filters [req-3a563ed4-326d-4749-b5c3-723a67bb5629 10e13e496c894457acefa5a56809ab24 acc51db1f44d42dcb18313535a45f97f - default default] Filtering removed all hosts for the request with instance ID '3ee2e240-d033-4382-a774-44cccd0ebdc6'. Filter results: ['RetryFilter: (start: 1, end: 1)', 'ComputeFilter: (start: 1, end: 1)', 'AvailabilityZoneFilter: (start: 1, end: 0)']
2021-03-30T14:41:39.05143533Z stdout F 2021-03-30 14:41:39.051 1 INFO nova.filters [req-3a563ed4-326d-4749-b5c3-723a67bb5629 10e13e496c894457acefa5a56809ab24 acc51db1f44d42dcb18313535a45f97f - default default] Filtering removed all hosts for the request with instance ID '3ee2e240-d033-4382-a774-44cccd0ebdc6'. Filter results: ['RetryFilter: (start: 1, end: 1)', 'ComputeFilter: (start: 1, end: 1)', 'AvailabilityZoneFilter: (start: 1, end: 0)']
  fm.py.254 Raised alarm, uuid=55f29b20-61b7-4b86-80d1-510cde35b5ca, fm_uuid=f025e3a0-01bd-4d6d-bb43-d5deb672b6e1.

Thanks!
Zhipeng