Re: virsh and bash scripts

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On Mon, Jan 08, 2018 at 04:07:12PM +0100, Erik Skultety wrote:
> On Sat, Jan 06, 2018 at 05:27:52PM +0200, Hetz Ben Hamo wrote:
> > Hi,
> >
> > I'm looking for a way to use virsh to connect to vCenter/VCSA and do some
> > simple management of the VM's in case of power loss (I'm planning to run
> > the script upon UPS/apcd event of power failure).
> >
> > Looking through the virsh documentation, I didn't find 2 things:
>
> I'm not familiar with the VCSA solution topology, but virsh is just cli
> frontend to libvirt APIs, the documentation you're looking for is here [1].

aand of course I forgot to link the URI itself:
[1] https://libvirt.org/drvesx.html

Erik


>
> >
> > 1. Login through a script (I don't see any user/password, specially since
> > VCSA for example requires to use username@vsphere.local [or your AD domaino
>
> Unless you use the C/Python/Other APIs directly where you can actually specify
> a callback that is called during the authentication phase, you're stuck with
> the default callback which provides you with a prompt which reads from stdin.
>
> > insteadd of vsphere.local if you connected it to your AD domain])
> > 2. Get all the VMs running on the vCenter, not just specific hosts.
>
> you're connecting via the ESX driver (using the type 'vpx' in the URI schema),
> which from libvirt's point of view is client-side only which means that we use
> the driver to talk to the vCenter. When querying the list of machines, I would
> expect the vCenter/ESX server to return the list of all VMs on all vCenter
> nodes, if not so, then either our driver needs to be updated to reflect the
> changes or the backend API (the ESX server/vCenter) doesn't support this
> feature and you'll need to query all the nodes manually.
>
> I never tried using the esx driver, so that's just my understanding of how I
> think things are supposed to work, i.e. it's fairly out of libvirt's reach,
> since we just call the corresponding remote APIs the ESX provides, there's no
> daemon we can control.
>
> Erik
>
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