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From Parth Patel <parthpatel2...@gmail.com>
Subject Re: KVM HostHA
Date Mon, 12 Mar 2018 17:35:07 GMT
>
> Hi Jon,
>
> As I said, in my case, making the host HA didn't work but by just having a
> HA VM running on host and executing - (WARNING) "echo c >
> /proc/sysrq-trigger" to simulate a kernel crash on host, the management
> server registered it as down and started the VM on another host. I know
> I've suggested this before but I insist you give this a try. Also, you
> don't need to completely power off the machine manually but just plugging
> out the network cable works fine. The cloudstack agent after losing
> connection to management server auto reboots because of KVM heartbeat check
> shell script mentioned by Rohit Yadav to one of my earlier queries in other
> thread.
>
> On Mon 12 Mar, 2018, 21:23 Jon Marshall, <jms.123@hotmail.co.uk> wrote:
> Hi Paul
>
>
> Thanks for the response.
>
>
> I think I am not understanding how it was meant to work then. My
> understanding was that the manager used ipmitool to just keep querying the
> compute nodes as to their status so I assumed it didn't matter how you shut
> the node down, once it was down the manager would get no response and mark
> it as down (which it does).
>
>
> I am in testing mode so I think I will just go and pull the power and see
> what happens :)
>
>
> Thanks
>
>
> Jon
>
>
> ________________________________
> From: Paul Angus <paul.angus@shapeblue.com>
> Sent: 12 March 2018 15:31
> To: users@cloudstack.apache.org
> Subject: RE: KVM HostHA
> Hi Jon,
>
> I think that what you guys are finding, is that a controlled host
> shutdown, which will cause the agent to shutdown cleanly; Is not considered
> an HA event. I wouldn't expect CloudStack to take any action if you shut
> down a host, only if the host (agent) stops responding.
>
>
>
>
> Kind regards,
>
> Paul Angus
>
> paul.angus@shapeblue.com
> www.shapeblue.com<http://www.shapeblue.com>
> [http://www.shapeblue.com/wp-content/uploads/2017/06/logo.png]<
> http://www.shapeblue.com/>
>
> Shapeblue - The CloudStack Company<http://www.shapeblue.com/>
> www.shapeblue.com
> Rapid deployment framework for Apache CloudStack IaaS Clouds. CSForge is a
> framework developed by ShapeBlue to deliver the rapid deployment of a
> standardised ...
>
>
>
> 53 Chandos Place, Covent Garden, London WC2N 4HSUK
> @shapeblue
>
>
>
>
> -----Original Message-----
> From: Jon Marshall <jms.123@hotmail.co.uk>
> Sent: 12 March 2018 15:15
> To: users@cloudstack.apache.org
> Subject: Re: KVM HostHA
>
> I have the same issue here and am not entirely sure what the behaviour
> should be.
>
>
> I have one manager node and 2 compute nodes running 4.11 with ipmi working
> correctly.
>
>
> From the UI under HA -
>
>
> HA Enabled Yes
> HA State Available
> HA Provider kvmhaprovider
>
>
> although interestingly from the "Details" tab it shows -
>
>
> HA enabled No
>
>
> which I assume is a cosmetic issue ?
>
>
> On each compute node I have one HA enabled VM and one non HA enabled VM.
>
>
> I power off a compute node and the UI updates the host status and the VMs
> on that node stop responding but they never fail over to the other node.
>
>
> Couple of things I noticed -
>
>
> 1) as soon as i power off the compute node the HA state on the other node
> shows "Ineligible"
>
>
> 2) In the UI the instances all still show as green even though two of them
> are not available
>
>
> Any help much appreciated
>
>
>
>
> ________________________________
> From: victor <victor@ihnetworks.com>
> Sent: 07 March 2018 17:01
> To: users@cloudstack.apache.org
> Subject: KVM HostHA
>
> Hello Guys,
>
> I have installed cloudstack 4.11. I have enabled HA for each hosts I have
> added. I have also added ipmi successfully (using ipmi driver).
> The hosts are showing like the following.
>
> =======
>
> HA Enabled Yes
> HA State Available
> HA Provider kvmhaprovider
>
> ======
>
> Also the host is showing the following correctly
>
> Resource state --> Enabled
> State --> UP
> Power state --> On
>
> So I have shutdown one of the hosts to see how the KVM hosts Ha is
> working. I have waited for half an hour. But nothing has happened. What
> will happen to the VM's in that host, if the host failed to back up.
> There isn't much from logs.
>
> Regards
> Victor
>

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