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HMC session settings, might cause deploy, lpm, resize failure in PowerVC

Troubleshooting


Problem

LPM, Deploy, Resize, Volume attach, errors might appear due to greenlet and HMC 401 error
in var/log/nova/MT_SN.compute.log 

ERROR powervc_nova.compute.discovery_manager [-] Detected periodic tasks have stopped running.

ERROR powervc_nova.compute.discovery_manager [-] Greenthread 0 <greenlet.greenlet object at  suspended active started main>

INFO powervc_oslo.k2.k2operator [req- - - - -] logging on HMCFQDN

INFO powervc_oslo.k2.k2operator [req - - - -] result: 401 () for DELETE httpsk2://HMCFQDN:443/rest/api/web/Logon

INFO powervc_oslo.k2.k2operator [req- - - -] response.body: b'\n<entry xmlns="http://www.w3.org/2005/Atom" xmlns:ns2="http://a9.com/-/spec/opensearch/1.1/" xmlns:ns3="http://www.w3.org/1999/xhtml">\n

This is due to the number of session, session idle timeout and the user used to connect the HMC under PowerVC time out value.

Resolving The Problem

We recommend:
To edit the setting in HMC (in both if this is a redundant pair)
HMC Management> HMC Settings >
Idle time out in minutes: 120
Maximum Web session per user: 200 
image-20250310173450-1
Then edit the user setting for the one used to connect the HMC to PowerVC:
Go to users > select the one in question > Edit >
Idle timeout minutes: 61
image-20250310173742-2
Reference: 
https://www.ibm.com/docs/en/power10/000V-HMC?topic=tasks-hmc-settings

Document Location

Worldwide

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Document Information

Modified date:
11 March 2025

UID

ibm17185326

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