Bug 1703110

Summary: uneven instance placement on compute nodes
Product: Red Hat OpenStack Reporter: Eduard Barrera <ebarrera>
Component: openstack-novaAssignee: Kashyap Chamarthy <kchamart>
Status: CLOSED DUPLICATE QA Contact: OSP DFG:Compute <osp-dfg-compute>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 13.0 (Queens)CC: dasmith, eglynn, jhakimra, kchamart, mbooth, sbauza, sgordon, vromanso
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Last Closed: 2019-05-24 13:32:25 UTC Type: Bug
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Description Eduard Barrera 2019-04-25 14:21:31 UTC 
Description of problem:

we are having a problem where the scheduler is not distrubuting correctly the instances across all the available compute node:

There is a group of nodes where no instances are scheduled:


2019-04-24 15:11:51.734 1 DEBUG nova.scheduler.filter_scheduler [req-1c573bd7-30f9-434a-96e8-ac1fc6668c58 db59947485d447e1a7c58477d94d8805 a2764e78bb344151877bde6ffdd713e2 - default default] 

Weighed [
(overcloud-compute-std-9.localdomain, overcloud-compute-std-9.localdomain)   ram: 863930MB disk: 854016MB io_ops: 0 instances: 8,

(overcloud-compute-std-13.localdomain, overcloud-compute-std-13.localdomain) ram: 843450MB disk: 841728MB io_ops: 0 instances: 9, 
(overcloud-compute-std-14.localdomain, overcloud-compute-std-14.localdomain) ram: 720570MB disk: 768000MB io_ops: 0 instances: 15, 
(overcloud-compute-std-1.localdomain, overcloud-compute-std-1.localdomain)   ram: 720570MB disk: 768000MB io_ops: 0 instances: 15, 
(overcloud-compute-std-6.localdomain, overcloud-compute-std-6.localdomain)   ram: 720570MB disk: 768000MB io_ops: 0 instances: 15, 
(overcloud-compute-std-12.localdomain, overcloud-compute-std-12.localdomain) ram: 720570MB disk: 768000MB io_ops: 0 instances: 15, 
(overcloud-compute-std-11.localdomain, overcloud-compute-std-11.localdomain) ram: 720570MB disk: 768000MB io_ops: 0 instances: 15, 
(overcloud-compute-std-0.localdomain, overcloud-compute-std-0.localdomain)   ram: 862906MB disk: 841728MB io_ops: 1 instances: 9, 

Instances snot scheduled on this nodes:

(overcloud-compute-std-15.localdomain, overcloud-compute-std-15.localdomain) ram: 1027770MB disk: 944128MB io_ops: 0 instances: 0, 
(overcloud-compute-std-5.localdomain, overcloud-compute-std-5.localdomain)   ram: 1027770MB disk: 944128MB io_ops: 0 instances: 0,
(overcloud-compute-std-8.localdomain, overcloud-compute-std-8.localdomain)   ram: 1027770MB disk: 944128MB io_ops: 0 instances: 0, 
(overcloud-compute-std-3.localdomain, overcloud-compute-std-3.localdomain)   ram: 1027770MB disk: 944128MB io_ops: 0 instances: 0, 
(overcloud-compute-std-7.localdomain, overcloud-compute-std-7.localdomain)   ram: 1027770MB disk: 944128MB io_ops: 0 instances: 0, 
(overcloud-compute-std-4.localdomain, overcloud-compute-std-4.localdomain)   ram: 1027770MB disk: 944128MB io_ops: 0 instances: 0, 
(overcloud-compute-std-2.localdomain, overcloud-compute-std-2.localdomain)   ram: 1027770MB disk: 942080MB io_ops: 0 instances: 0, 
(overcloud-compute-std-10.localdomain, overcloud-compute-std-10.localdomain) ram: 1027770MB disk: 944128MB io_ops: 0 instances: 0
] _get_sorted_hosts /usr/lib/python2.7/site-packages/nova/scheduler/filter_scheduler.py:424



Version-Release number of selected component (if applicable):
OSP13

How reproducible:
always

Steps to Reproduce:
Via horizon or an application consuming openstack api

Actual results:
Instances not distributed to all compute nods

Expected results:
Instances  distributed to all compute nods


There is no cells, no host aggregates
Comment 3 Matthew Booth 2019-05-24 13:32:25 UTC 

*** This bug has been marked as a duplicate of bug 1701334 ***
Comment 4 Red Hat Bugzilla 2023-09-18 00:16:08 UTC 
The needinfo request[s] on this closed bug have been removed as they have been unresolved for 120 days