Bug 1794013 - Ansible consumes around 50 cores of CPU when running the update /etc/hosts task on a scale deployment
Summary: Ansible consumes around 50 cores of CPU when running the update /etc/hosts ta...
Keywords:
Status: CLOSED DUPLICATE of bug 1794012
Alias: None
Product: Red Hat OpenStack
Classification: Red Hat
Component: tripleo-ansible
Version: 16.0 (Train)
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
: ---
Assignee: RHOS Maint
QA Contact: Sasha Smolyak
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-01-22 13:56 UTC by Sai Sindhur Malleni
Modified: 2020-01-22 14:54 UTC (History)
0 users

Fixed In Version:
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Last Closed: 2020-01-22 14:54:39 UTC
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Description Sai Sindhur Malleni 2020-01-22 13:56:34 UTC 
Description of problem:
When scaling from 200 nodes to 250 nodes in OSP 16, we see ansible-playbook process consume around 50 cores on the undercloud during the update /etc/hosts task which runs for around 22 minutes

Version-Release number of selected component (if applicable):
RHOS_TRUNK-16.0-RHEL-8-20200113.n.0

How reproducible:
100% at scale

Steps to Reproduce:
1. Run a scale out on a large deployment
2. Monitor CPU usage of ansible
3.

Actual results:
Ansible consumes around 50 cores on the undercloud

Expected results:
Consuming 50 cores isn't acceptable

Additional info:
https://snapshot.raintank.io/dashboard/snapshot/Xujs6L7FAsCM8Kpzc63khcOUi8RBRkbj?orgId=2
Comment 1 Sai Sindhur Malleni 2020-01-22 14:54:39 UTC 

*** This bug has been marked as a duplicate of bug 1794012 ***
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