cloudstack-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Asai <a...@globalchangemusic.org>
Subject Re: Autostarting VMs on KVM?
Date Mon, 27 Aug 2018 21:57:57 GMT
Thank you, Makrand.

On 8/27/2018 11:11 AM, Makrand wrote:
> Hi Asai,
>
> The Server offering with HA enabled will do trick. While launching the VM
> just choose this SO. In case your previous SO was not ha enabled (and thus
> VM) you can actually change the SO and relaunch VM. Just test it before on
> one of the VMs.
>
> The VMs with HA enabled will come back on its own once the standalone host
> comes back online (Assuming VMs went down abruptly while host went down and
> not shutdown manually)
>
> Note- By default, all virtual router VMs and Elastic Load Balancing VMs are
> automatically configured as HA-enabled.
>
> --
> Makrand
>
>
> On Thu, Aug 16, 2018 at 2:41 AM, Asai <asai@globalchangemusic.org> wrote:
>
>> Thanks, Eric,
>>
>> Do they have to be already created as HA instances?  Can you turn on HA
>> after the fact?
>>
>> Also, what if it’s only one standalone server with no failover?
>>
>> Asai
>>
>>
>>> On Aug 15, 2018, at 1:39 PM, Eric Lee Green <eric.lee.green@gmail.com>
>> wrote:
>>> If you set the offering to allow HA and create the instances as HA
>> instances, they will autostart once the management server figures out
>> they're really dead (either because it used STONITH to kill the unreachable
>> node, or because that node became reachable again). When I had to reboot my
>> cluster due to a massive network failure (critical 10 gigabit switch
>> croaked, had to slide a new one in), all the instances marked "HA" came
>> back up all by themselves without me having to do anything about it.
>>> On 8/15/18 09:11, Asai wrote:
>>>> Thanks, Dag,
>>>>
>>>> Looks like scripting it is the way to go.
>>>> Asai
>>>>
>>>>
>>>>> On Aug 15, 2018, at 9:06 AM, Dag Sonstebo <Dag.Sonstebo@shapeblue.com>
>> wrote:
>>>>> Hi Asai,
>>>>>
>>>>> In short – no that is not a use case CloudStack is designed for, the
>> VM states are controlled by CloudStack management. You should however look
>> at using HA service offerings and host HA (if you meet all the
>> pre-requisites). Between these mechanisms VMs can be brought up on other
>> hosts if a host goes down.
>>>>> Alternatively if you are looking to trigger an automated startup of
>> VMs I suggest you simply script this with e.g. cloudmonkey. Keep in mind
>> this still requires a healthy management server though.
>>>>> Regards,
>>>>> Dag Sonstebo
>>>>> Cloud Architect
>>>>> ShapeBlue
>>>>>
>>>>> On 15/08/2018, 16:47, "Asai" <asai@globalchangemusic.org> wrote:
>>>>>
>>>>>     Thanks, Dag,
>>>>>
>>>>>     On boot of the server, I would like the VMs to start up
>> automatically, rather than me having to go to the management console and
>> start them manually.  We suffered some downtime and in restarting the
>> hardware, I had to manually get everything back up and running.
>>>>>     Asai
>>>>>
>>>>>
>>>>>
>>>>> Dag.Sonstebo@shapeblue.com
>>>>> www.shapeblue.com
>>>>> 53 Chandos Place, Covent Garden, London  WC2N 4HSUK
>>>>> @shapeblue
>>>>>
>>>>>
>>>>>
>>>>>> On Aug 15, 2018, at 1:22 AM, Dag Sonstebo <Dag.Sonstebo@shapeblue.com>
>> wrote:
>>>>>> Hi Asai,
>>>>>>
>>>>>> Can you explain a bit more what you are trying to achieve? Everything
>> in CloudStack is controlled by the management server, not the KVM host, and
>> in general the assumption is a KVM host is always online.
>>>>>> Regards,
>>>>>> Dag Sonstebo
>>>>>> Cloud Architect
>>>>>> ShapeBlue
>>>>>>
>>>>>> On 15/08/2018, 03:38, "Asai" <asai@globalchangemusic.org> wrote:
>>>>>>
>>>>>>    Greetings,
>>>>>>
>>>>>>    Can anyone offer advice on how to autostart VMs at boot time using
>> KVM?  There doesn’t seem to be any documentation for this in the CS docs.
>> We’re on CS 4.9.2.0.
>>>>>>    I tried doing it with virsh autostart, but it just throws an error.
>>>>>>
>>>>>>    Thank you,
>>>>>>    Asai
>>>>>>
>>>>>>
>>>>>>
>>>>>> Dag.Sonstebo@shapeblue.com
>>>>>> www.shapeblue.com
>>>>>> 53 Chandos Place, Covent Garden, London  WC2N 4HSUK
>>>>>> @shapeblue
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>

Mime
View raw message