Bug 1376038

Summary: RFE: In place node upgrades.
Product: OpenShift Container Platform Reporter: Timothy St. Clair <tstclair>
Component: RFEAssignee: Derek Carr <decarr>
Status: CLOSED WONTFIX QA Contact: Xiaoli Tian <xtian>
Severity: medium Docs Contact:
Priority: medium    
Version: 3.3.0CC: aos-bugs, jokerman, mmccomas, sdodson, tstclair
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Last Closed: 2018-01-25 22:30:39 UTC Type: Bug
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Description Timothy St. Clair 2016-09-14 13:26:31 UTC 
Description of problem:
As of today when we evac on upgrades. https://docs.openshift.com/enterprise/3.2/install_config/upgrading/manual_upgrades.html#upgrading-nodes

On a large scale, highly dense clusters, this can cause a massive reshuffling in the cluster and affect service SLOs.  

We should aim to allow in-place upgrades.  Either live, or via checkpoint and restore.  This may touch on the need for maintenance windows and forgiveness.

This touches both upstream enablement as well as the installer.  

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

How reproducible:
100%

Steps to Reproduce:
Upgrade

Actual results:
Pods evacuated.

Expected results:
No evacuation