Re: Autostarting VMs on KVM?

Mon, 27 Aug 2018 14:58:48 -0700 

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 <a...@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.gr...@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.sonst...@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" <a...@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.sonst...@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.sonst...@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" <a...@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.sonst...@shapeblue.com
www.shapeblue.com
53 Chandos Place, Covent Garden, London  WC2N 4HSUK
@shapeblue

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