Any reason HA can not be used with baremetal?

[Jessica Tomechak <je...@gmail.com>]

Does it matter whether Offer HA is checked when creating a compute offering
for use with a bare metal deployment? My understanding of HA is that it
will restart a VM on another host in the same zone if the VM crashes. In
the case of bare metal, instead of a VM, we have a baremetal instance, one
per machine. Would checking Offer HA mean that if a bare metal host
crashes, another baremetal instance would be created on a different host in
the zone? Has anyone tried / tested this scenario?

Jessica T.

Re: Any reason HA can not be used with baremetal?

[Ahmad Emneina <ae...@gmail.com>]

youre probably not technically allowed to add shared storage to bare metal
hosts... at least not at this moment. so daves assertion about the
assumption and my irrelevant comment are correct, IMO. waiting for frank
for the definitive answer on this, since he implemented the feature
originally and is working on the modern bare metal.


On Mon, May 6, 2013 at 7:26 PM, Jessica Tomechak <jessica.tomechak@gmail.com
> wrote:

> On Mon, May 6, 2013 at 9:29 AM, David Nalley <da...@gnsa.us> wrote:
>
> > On Mon, May 6, 2013 at 10:38 AM, Jessica Tomechak
> > <je...@gmail.com> wrote:
> > > Does it matter whether Offer HA is checked when creating a compute
> > offering
> > > for use with a bare metal deployment? My understanding of HA is that it
> > > will restart a VM on another host in the same zone if the VM crashes.
> In
> > > the case of bare metal, instead of a VM, we have a baremetal instance,
> > one
> > > per machine. Would checking Offer HA mean that if a bare metal host
> > > crashes, another baremetal instance would be created on a different
> host
> > in
> > > the zone? Has anyone tried / tested this scenario?
> > >
> > > Jessica T.
> >
> >
> > No assumption of shared storage - as a matter of fact, I think the
> > assumption is the opposite.
> >
> > --David
> >
>
> I think you check "Shared" for Storage Type when creating a compute
> offering for an HA host. So I'm not sure whether your assumption about the
> assumption is correct. I'd love to hear more about this.
>
> Since we're talking about these settings, there are a few others which I'm
> not sure how to document. These are in the Add Compute Offering dialog.
> When the offering is for a bare metal host, would there be any restrictions
> on setting these, or perhaps would some or all of them not make sense with
> bare metal even if they're technically allowed:
>
> Network Rate
> Storage Tags
> CPU Cap
> isVolatile
>
> Jessica T.
>

Re: Any reason HA can not be used with baremetal?

[Jessica Tomechak <je...@gmail.com>]

On Mon, May 6, 2013 at 9:29 AM, David Nalley <da...@gnsa.us> wrote:

> On Mon, May 6, 2013 at 10:38 AM, Jessica Tomechak
> <je...@gmail.com> wrote:
> > Does it matter whether Offer HA is checked when creating a compute
> offering
> > for use with a bare metal deployment? My understanding of HA is that it
> > will restart a VM on another host in the same zone if the VM crashes. In
> > the case of bare metal, instead of a VM, we have a baremetal instance,
> one
> > per machine. Would checking Offer HA mean that if a bare metal host
> > crashes, another baremetal instance would be created on a different host
> in
> > the zone? Has anyone tried / tested this scenario?
> >
> > Jessica T.
>
>
> No assumption of shared storage - as a matter of fact, I think the
> assumption is the opposite.
>
> --David
>

I think you check "Shared" for Storage Type when creating a compute
offering for an HA host. So I'm not sure whether your assumption about the
assumption is correct. I'd love to hear more about this.

Since we're talking about these settings, there are a few others which I'm
not sure how to document. These are in the Add Compute Offering dialog.
When the offering is for a bare metal host, would there be any restrictions
on setting these, or perhaps would some or all of them not make sense with
bare metal even if they're technically allowed:

Network Rate
Storage Tags
CPU Cap
isVolatile

Jessica T.

Re: Any reason HA can not be used with baremetal?

[David Nalley <da...@gnsa.us>]

On Mon, May 6, 2013 at 10:38 AM, Jessica Tomechak
<je...@gmail.com> wrote:
> Does it matter whether Offer HA is checked when creating a compute offering
> for use with a bare metal deployment? My understanding of HA is that it
> will restart a VM on another host in the same zone if the VM crashes. In
> the case of bare metal, instead of a VM, we have a baremetal instance, one
> per machine. Would checking Offer HA mean that if a bare metal host
> crashes, another baremetal instance would be created on a different host in
> the zone? Has anyone tried / tested this scenario?
>
> Jessica T.


No assumption of shared storage - as a matter of fact, I think the
assumption is the opposite.

--David

Re: Any reason HA can not be used with baremetal?

[Ahmad Emneina <ae...@gmail.com>]

I dont think there is a meaningful way to determine the host state in a
bare metal instance without writing a guest specific client/agent. IPMI
when queried will just let you know the chassis' power state, which isnt
very useful. To my knowledge HA and bare metal dont work together at the
moment.


On Mon, May 6, 2013 at 7:38 AM, Jessica Tomechak <jessica.tomechak@gmail.com
> wrote:

> Does it matter whether Offer HA is checked when creating a compute offering
> for use with a bare metal deployment? My understanding of HA is that it
> will restart a VM on another host in the same zone if the VM crashes. In
> the case of bare metal, instead of a VM, we have a baremetal instance, one
> per machine. Would checking Offer HA mean that if a bare metal host
> crashes, another baremetal instance would be created on a different host in
> the zone? Has anyone tried / tested this scenario?
>
> Jessica T.
>