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From "edison su (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CLOUDSTACK-5578) KVM - Network down - When the host looses network connectivity , reboot stuck while unmounting primary
Date Mon, 17 Nov 2014 23:26:34 GMT

    [ https://issues.apache.org/jira/browse/CLOUDSTACK-5578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14215390#comment-14215390
] 

edison su commented on CLOUDSTACK-5578:
---------------------------------------

It's due to the behavior on kvm host:

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Virtualization_Deployment_and_Administration_Guide/sect-Managing_guest_virtual_machines_with_virsh-Shutting_down_rebooting_and_force_shutdown_of_a_guest_virtual_machine.html

Normally, KVM host will try to suspend vms on host during reboot, which may stuck when primary
storage is unavailable.
As you said, we could try "reboot -f", or change the KVM host behavior, to forcefully shutdown
vms.

> KVM - Network down - When the host looses network connectivity , reboot stuck while unmounting
primary
> ------------------------------------------------------------------------------------------------------
>
>                 Key: CLOUDSTACK-5578
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-5578
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>          Components: Management Server
>    Affects Versions: 4.2.0
>         Environment: Build from 4.3
>            Reporter: Sangeetha Hariharan
>            Assignee: Kishan Kavala
>            Priority: Critical
>             Fix For: 4.5.0
>
>         Attachments: DisconnectedHost.png, kvm-hostdisconnect.rar, nfsUmount.jpg
>
>
> KVM - Network down - When the host looses network connectivity , it is not able to fence
itself.
> Steps to reproduce the problem:
> Set up - Advanced zone with 2 Rhel 6.3 hosts in cluster.
> Deploy ~10 Vms.
> Simulate network disconnect on the host ( ifdown em1)
> Host gets marked as "Down" and all the Vms gets HA-ed to the other host.
> On the KVM host which lost connectivity , attempt to shutdown itself fails.
> It was not able to umount the primary store.



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