Hi,
Do you mean this sleep :
# read() returns immediately (non-blocking) if no one is
# listening on the other side of the virtio-serial port.
# So in order not to be in a tight-loop and waste CPU
# time, we just sleep for a while and hope someone will
# be there when we will awake from our nap.
time.sleep(1)
Thx.
Regards,
J..P
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Objet : Users Digest, Vol 52, Issue 87
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Contents of Users digest..."
Today's Topics:
1. Re: What's going on open channel devices when migrating the
Guest ? (Vinzenz Feenstra)
2. Re: Scripting Guests migration , shutdown and reboot ( from
ovirt) ? (Vinzenz Feenstra)
----------------------------------------------------------------------
Message: 1
Date: Fri, 15 Jan 2016 10:51:50 +0100
From: Vinzenz Feenstra <[email protected]<mailto:[email protected]>>
To: Jean-Pierre Ribeauville
<[email protected]<mailto:[email protected]>>
Cc: "[email protected]<mailto:[email protected]>"
<[email protected]<mailto:[email protected]>>
Subject: Re: [ovirt-users] What's going on open channel devices when
migrating the Guest ?
Message-ID:
<[email protected]<mailto:[email protected]>>
Content-Type: text/plain; charset="utf-8"
> On Jan 15, 2016, at 10:08 AM, Jean-Pierre Ribeauville
> <[email protected]<mailto:[email protected]>> wrote:
>
> Hi,
>
> I?m using a channel device between host and guest to exchange datas every 20
> seconds.
>
> On the Guest size , there is an open /dev/virtio file on which we read
> continuously what?s sent by the host.
>
> My question is the following :
> When migrating the Guest to another host , and the migrating back to
> the first one , the Guest software doesn?t receive anymore datas from the
> host unless I restart the Guest software to re-open the /dev/virtio file.
>
> Is there any way to detect in the Guest that migration has been done so we
> have to reopen the file ?
Well you can look how we do it in the ovirt-guest-agent. But we?re not
reopening the unix domain socket - We?re basically on read failure just
rescheduling the read - That causes no problems after migrations - it just
continues
Our python code for that is here:
https://github.com/oVirt/ovirt-guest-agent/blob/master/ovirt-guest-agent/VirtIoChannel.py
HTH
>
> Any hint is welcome .
>
> Thanks for help.
>
>
> J.P. Ribeauville
>
> P: +33.(0).1.47.17.20.49
> .
> Puteaux 3 Etage 5 Bureau 4
>
> [email protected]<mailto:[email protected]>
> <mailto:[email protected]>
> http://www.axway.com <http://www.axway.com/>
>
> P Pensez ? l?environnement avant d?imprimer.
>
>
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Message: 2
Date: Fri, 15 Jan 2016 10:53:31 +0100
From: Vinzenz Feenstra <[email protected]<mailto:[email protected]>>
To: Jean-Pierre Ribeauville
<[email protected]<mailto:[email protected]>>
Cc: "[email protected]<mailto:[email protected]>"
<[email protected]<mailto:[email protected]>>
Subject: Re: [ovirt-users] Scripting Guests migration , shutdown and
reboot ( from ovirt) ?
Message-ID:
<[email protected]<mailto:[email protected]>>
Content-Type: text/plain; charset="utf-8"
> On Jan 15, 2016, at 9:53 AM, Jean-Pierre Ribeauville
> <[email protected]<mailto:[email protected]>> wrote:
>
> Hi,
>
> In order to test reliability of some of my softwares running on Guest and
> Hosts, I would like to script
> from RHEV-M manager host , via command line interface, sequences for
> rebooting , migrate and shutdown/run KVM Guests.
>
> What?s your hint to achieve this ?
Well you could use the Python SDK http://www.ovirt.org/Python-sdk
>
>
> I cannot use virsh on the host cos theses domains are transient ones , so
> they disappear from the host virsh list as soon as they are off.
>
>
> Thx for your help.
>
> Regards,
>
> J.P. Ribeauville
>
> P: +33.(0).1.47.17.20.49
> .
> Puteaux 3 Etage 5 Bureau 4
>
> [email protected]<mailto:[email protected]>
> <mailto:[email protected]>
> http://www.axway.com <http://www.axway.com/>
>
> P Pensez ? l?environnement avant d?imprimer.
>
>
> _______________________________________________
> Users mailing list
> [email protected]<mailto:[email protected]> <mailto:[email protected]>
> http://lists.ovirt.org/mailman/listinfo/users
> <http://lists.ovirt.org/mailman/listinfo/users>
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