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[Bug 1799727] [NEW] CPU_Allocation_Ratio from nova.conf doesn't update exisiting providers

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Public bug reported:

(OpenStack 14)

After changing the value of cpu_allocation_ratio in nova.conf from 16 to
1 and restarting nova containers, the ProviderTree still uses the old
value

(A patch with extra debugging is applied to the system for ProviderTree
information)

Nova.conf setting:

cpu_allocation_ratio=1

[root@compute-0 ~]# docker restart nova_compute nova_libvirt
nova_compute
nova_libvirt

Inside Nova-compute.log

2018-10-23 19:19:49.217 1 DEBUG oslo_service.service [req-9539f623-b342
-4c5d-ab93-6ffacdbd8358 - - - - -] cpu_allocation_ratio           = 1.0
log_opt_values /usr/lib/python2.7/site-packages/oslo_config/cfg.py:3023

2018-10-23 19:19:51.990 1 DEBUG nova.scheduler.client.report [req-9490c7f4-2157-44ef-a81c-ea3e6bf9be21 - - - - -] Updating ProviderTree inventory for provider ca60934d-074d-4628-ae61-3c3bbc9e5543 from _refresh_and_get_inventory using data: {u'VCPU': {u'allocation_ratio': 16.0, u'total': 6, u'reserved': 0, u'step_size': 1, u'min_unit': 1, u'max_unit': 6}, u'MEMORY_MB': {u'allocation_ratio': 1.0, u'total': 6143, u'reserved': 4096, u'step_size': 1, u'min_unit': 1, u'max_unit': 6143}, u'DISK_GB': {u'allocation_ratio': 1.0, u'total': 19, u'reserved': 0, u'step_size': 1, u'min_unit': 1, u'max_unit': 19}} _refresh_and_get_inventory /usr/lib/python2.7/site-packages/nova/scheduler/client/report.py:754
2018-10-23 19:19:51.990 1 DEBUG nova.compute.provider_tree [req-9490c7f4-2157-44ef-a81c-ea3e6bf9be21 - - - - -] Updating inventory in ProviderTree for provider ca60934d-074d-4628-ae61-3c3bbc9e5543 with inventory: {u'VCPU': {u'allocation_ratio': 16.0, u'total': 6, u'reserved': 0, u'step_size': 1, u'min_unit': 1, u'max_unit': 6}, u'MEMORY_MB': {u'allocation_ratio': 1.0, u'total': 6143, u'reserved': 4096, u'step_size': 1, u'min_unit': 1, u'max_unit': 6143}, u'DISK_GB': {u'allocation_ratio': 1.0, u'total': 19, u'reserved': 0, u'step_size': 1, u'min_unit': 1, u'max_unit': 19}} update_inventory /usr/lib/python2.7/site-packages/nova/compute/provider_tree.py:172

** Affects: nova
     Importance: Undecided
         Status: New

** Description changed:

+ (OpenStack 14)
+ 
  After changing the value of cpu_allocation_ratio in nova.conf from 16 to
  1 and restarting nova containers, the ProviderTree still uses the old
  value
  
  (A patch with extra debugging is applied to the system for ProviderTree
  information)
  
  Nova.conf setting:
  
  cpu_allocation_ratio=1
  
- 
  [root@compute-0 ~]# docker restart nova_compute nova_libvirt
  nova_compute
  nova_libvirt
- 
  
  Inside Nova-compute.log
  
  2018-10-23 19:19:49.217 1 DEBUG oslo_service.service [req-9539f623-b342
  -4c5d-ab93-6ffacdbd8358 - - - - -] cpu_allocation_ratio           = 1.0
  log_opt_values /usr/lib/python2.7/site-packages/oslo_config/cfg.py:3023
  
  2018-10-23 19:19:51.990 1 DEBUG nova.scheduler.client.report [req-9490c7f4-2157-44ef-a81c-ea3e6bf9be21 - - - - -] Updating ProviderTree inventory for provider ca60934d-074d-4628-ae61-3c3bbc9e5543 from _refresh_and_get_inventory using data: {u'VCPU': {u'allocation_ratio': 16.0, u'total': 6, u'reserved': 0, u'step_size': 1, u'min_unit': 1, u'max_unit': 6}, u'MEMORY_MB': {u'allocation_ratio': 1.0, u'total': 6143, u'reserved': 4096, u'step_size': 1, u'min_unit': 1, u'max_unit': 6143}, u'DISK_GB': {u'allocation_ratio': 1.0, u'total': 19, u'reserved': 0, u'step_size': 1, u'min_unit': 1, u'max_unit': 19}} _refresh_and_get_inventory /usr/lib/python2.7/site-packages/nova/scheduler/client/report.py:754
  2018-10-23 19:19:51.990 1 DEBUG nova.compute.provider_tree [req-9490c7f4-2157-44ef-a81c-ea3e6bf9be21 - - - - -] Updating inventory in ProviderTree for provider ca60934d-074d-4628-ae61-3c3bbc9e5543 with inventory: {u'VCPU': {u'allocation_ratio': 16.0, u'total': 6, u'reserved': 0, u'step_size': 1, u'min_unit': 1, u'max_unit': 6}, u'MEMORY_MB': {u'allocation_ratio': 1.0, u'total': 6143, u'reserved': 4096, u'step_size': 1, u'min_unit': 1, u'max_unit': 6143}, u'DISK_GB': {u'allocation_ratio': 1.0, u'total': 19, u'reserved': 0, u'step_size': 1, u'min_unit': 1, u'max_unit': 19}} update_inventory /usr/lib/python2.7/site-packages/nova/compute/provider_tree.py:172

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https://bugs.launchpad.net/bugs/1799727

Title:
  CPU_Allocation_Ratio from nova.conf doesn't update exisiting providers

Status in OpenStack Compute (nova):
  New

Bug description:
  (OpenStack 14)

  After changing the value of cpu_allocation_ratio in nova.conf from 16
  to 1 and restarting nova containers, the ProviderTree still uses the
  old value

  (A patch with extra debugging is applied to the system for
  ProviderTree information)

  Nova.conf setting:

  cpu_allocation_ratio=1

  [root@compute-0 ~]# docker restart nova_compute nova_libvirt
  nova_compute
  nova_libvirt

  Inside Nova-compute.log

  2018-10-23 19:19:49.217 1 DEBUG oslo_service.service [req-
  9539f623-b342-4c5d-ab93-6ffacdbd8358 - - - - -] cpu_allocation_ratio
  = 1.0 log_opt_values /usr/lib/python2.7/site-
  packages/oslo_config/cfg.py:3023

  2018-10-23 19:19:51.990 1 DEBUG nova.scheduler.client.report [req-9490c7f4-2157-44ef-a81c-ea3e6bf9be21 - - - - -] Updating ProviderTree inventory for provider ca60934d-074d-4628-ae61-3c3bbc9e5543 from _refresh_and_get_inventory using data: {u'VCPU': {u'allocation_ratio': 16.0, u'total': 6, u'reserved': 0, u'step_size': 1, u'min_unit': 1, u'max_unit': 6}, u'MEMORY_MB': {u'allocation_ratio': 1.0, u'total': 6143, u'reserved': 4096, u'step_size': 1, u'min_unit': 1, u'max_unit': 6143}, u'DISK_GB': {u'allocation_ratio': 1.0, u'total': 19, u'reserved': 0, u'step_size': 1, u'min_unit': 1, u'max_unit': 19}} _refresh_and_get_inventory /usr/lib/python2.7/site-packages/nova/scheduler/client/report.py:754
  2018-10-23 19:19:51.990 1 DEBUG nova.compute.provider_tree [req-9490c7f4-2157-44ef-a81c-ea3e6bf9be21 - - - - -] Updating inventory in ProviderTree for provider ca60934d-074d-4628-ae61-3c3bbc9e5543 with inventory: {u'VCPU': {u'allocation_ratio': 16.0, u'total': 6, u'reserved': 0, u'step_size': 1, u'min_unit': 1, u'max_unit': 6}, u'MEMORY_MB': {u'allocation_ratio': 1.0, u'total': 6143, u'reserved': 4096, u'step_size': 1, u'min_unit': 1, u'max_unit': 6143}, u'DISK_GB': {u'allocation_ratio': 1.0, u'total': 19, u'reserved': 0, u'step_size': 1, u'min_unit': 1, u'max_unit': 19}} update_inventory /usr/lib/python2.7/site-packages/nova/compute/provider_tree.py:172

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