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HowTo Investigate Hangup or Unexpected Reboot of a Solaris Zone (Doc ID 2214066.1)

Last updated on MAY 27, 2021

Applies to:

Solaris x64/x86 Operating System - Version 10 3/05 HW1 and later
Solaris Operating System - Version 10 and later
Information in this document applies to any platform.

Goal

This document lists the files and data that are most commonly required when diagnosing unexpected reboot of a Solaris zone

A non-global zone does not panic or reset in the traditional sense. 
During shutdown of a non-global, all zones related processes will exit and the kernel in global zone is cleaning up the state related to the zone.
In case of issues with a non-global-zone, collect this information form the global zone, since the processes of all zones are visible from the global zone.

Solution

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In this Document
Goal
Solution
 Generic logs of console and messages
 Connect to console of non-global zone
 Check non-global zone console in /var/log/zones/<zonename>.console file  ( Solaris 11 on GZ only )
 Check non-global-zone messages files in /var/log/zones/<zonename>.messages   ( Solaris 11 on GZ only )
 Troubleshooting unexpected reboot of non-global zones
 Check boot timestamps in non-global-zone
 You may try to catch info about the caller of a shutdown command using DTrace
 Check for application corefiles generated by a non-global zone
 Troubleshooting hangup/shutdown of non-global zones
 Check the status of a non-global zone
 Check running/remaining processes for a non-global zone
 Does ssh into the guest still work? Does zlogin into the guest still work? Does zlogin -C work?
 Capture some info about the zoneadmd process for a specific non-global zone
 Consider to capture a kernel threadlist on global zone using mdb
 Consider to capture a live savecore
 Consider to create a savecore of the whole system from global zone (gracefully shutdown other running non-global zones first)
 Halting/shutdown/hang a Non Global Zone (NGZ) related MOS documents
References

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