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From Dag Sonstebo <Dag.Sonst...@shapeblue.com>
Subject Re: CloudStack HA
Date Wed, 30 Mar 2016 09:07:57 GMT
Hi Martins,

yes this is a typical example of host self fencing, where a host will reboot when losing connectivity
to a primary storage pool. As you have already found this is controlled by the xenheartbeat.sh
script.

Dag Sonstebo
Cloud Architect
ShapeBlue






On 30/03/2016, 10:04, "Mārtiņš Jakubovičs" <martins-lists@hostnet.lv> wrote:

>Looks like I found issue, it is /opt/cloud/bin/xenheartbeat.sh script 
>which is running in all hosts.
>
>On 2016.03.30. 11:14, Mārtiņš Jakubovičs wrote:
>> Hello,
>>
>> This morning I faced unexpected problem, one of XenServer hosts 
>> rebooted. I checked logs and it looks like due network issue, but 
>> question is why host rebooted it self? CloudStack's XS Pool is not HA 
>> enabled. And as I know, in ACS 4.3.2 CloudStack did not manage Host's 
>> HA or am I wrong?
>>
>> Mar 30 07:00:33 cloudstack-1 heartbeat: Potential problem with 
>> /var/run/sr-mount/858d490c-38e8-0f44-2840-c6acb98c3ae9/hb-b81b5d17-dea8-4257-a9b5-30b52229cc68:

>> not reachable since 65 seconds
>> Mar 30 07:00:33 cloudstack-1 heartbeat: Problem with 
>> /var/run/sr-mount/858d490c-38e8-0f44-2840-c6acb98c3ae9/hb-b81b5d17-dea8-4257-a9b5-30b52229cc68:

>> not reachable for 65 seconds, rebooting system!
>>
>> [root@cloudstack-1 ~]# xe pool-list params=all | grep ha-
>>                       ha-enabled ( RO): false
>>                 ha-configuration ( RO):
>>                    ha-statefiles ( RO):
>>     ha-host-failures-to-tolerate ( RW): 0
>>               ha-plan-exists-for ( RO): 0
>>              ha-allow-overcommit ( RW): false
>>                 ha-overcommitted ( RO): false
>>
>> So did ACS manage some kind of host's HA?
>>
>> XenServer 6.2
>> ACS 4.3.2
>>
>> Best regards,
>> Martins
>>
>

Regards,

Dag Sonstebo

Dag.Sonstebo@shapeblue.com 
www.shapeblue.com
53 Chandos Place, Covent Garden, London  WC2N 4HSUK
@shapeblue
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