[libvirt] [Question] Will we support to set boot order online?
Hello, I find that QEMU supports to set boot(QMP command "boot_set") order online, namely the virtual machine can be reboot in appointed order, but libvirt had no corresponding interface. So, I want to know if libvirt intend to support to set boot order online. If the answer is yes, I'll try to apply the patch. If no, why? Best Regards, -WangYufei
On Mon, Mar 03, 2014 at 08:22:13AM +0000, Wangyufei (James) wrote:
Hello, I find that QEMU supports to set boot(QMP command "boot_set") order online, namely the virtual machine can be reboot in appointed order, but libvirt had no corresponding interface. So, I want to know if libvirt intend to support to set boot order online. If the answer is yes, I'll try to apply the patch. If no, why?
AFAIK, no one has looked at this. NB, this will only work for guests actually using the old style boot order. Any guests using per-device boot indexes for ordering won't work with this command. Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|
On Mon, Mar 03, 2014 at 09:58:40 +0000, Daniel Berrange wrote:
On Mon, Mar 03, 2014 at 08:22:13AM +0000, Wangyufei (James) wrote:
Hello, I find that QEMU supports to set boot(QMP command "boot_set") order online, namely the virtual machine can be reboot in appointed order, but libvirt had no corresponding interface. So, I want to know if libvirt intend to support to set boot order online. If the answer is yes, I'll try to apply the patch. If no, why?
AFAIK, no one has looked at this.
NB, this will only work for guests actually using the old style boot order. Any guests using per-device boot indexes for ordering won't work with this command.
Hmm, looks like it's quite useless because libvirt uses per-device boot indexes whenever it is possible even if the domain XML used the old way of specifying boot order. Thus, it's very likely any domain running in a QEMU which is not ancient will be using per-device boot order. Jirka
Thanks all! I will have a think about it.
-----Original Message----- From: Jiri Denemark [mailto:jdenemar@redhat.com] Sent: Monday, March 03, 2014 9:31 PM To: Daniel P. Berrange Cc: Wangyufei (James); libvir-list@redhat.com; Moyuxiang; Zhaoyanbin (A) Subject: Re: [libvirt] [Question] Will we support to set boot order online?
On Mon, Mar 03, 2014 at 09:58:40 +0000, Daniel Berrange wrote:
On Mon, Mar 03, 2014 at 08:22:13AM +0000, Wangyufei (James) wrote:
Hello, I find that QEMU supports to set boot(QMP command "boot_set") order online, namely the virtual machine can be reboot in appointed order, but libvirt had no corresponding interface. So, I want to know if libvirt intend to support to set boot order online. If the answer is yes, I'll try to apply the patch. If no, why?
AFAIK, no one has looked at this.
NB, this will only work for guests actually using the old style boot order. Any guests using per-device boot indexes for ordering won't work with this command.
Hmm, looks like it's quite useless because libvirt uses per-device boot indexes whenever it is possible even if the domain XML used the old way of specifying boot order. Thus, it's very likely any domain running in a QEMU which is not ancient will be using per-device boot order.
Jirka
Thank you very much. For example, if at first I install an OS in a virtual machine from NETWORK, then I modify the boot option from NETWORK to HD online, at last I reboot the virtual machine. I hope it can boot from HD now. Can per-device boot indexes work on this situation? If yes, how does it work? If no, can I try to make a patch to set boot indexes online (maybe play with the QEMU command "boot_set")?
-----Original Message----- From: Jiri Denemark [mailto:jdenemar@redhat.com] Sent: Monday, March 03, 2014 9:31 PM To: Daniel P. Berrange Cc: Wangyufei (James); libvir-list@redhat.com; Moyuxiang; Zhaoyanbin (A) Subject: Re: [libvirt] [Question] Will we support to set boot order online?
On Mon, Mar 03, 2014 at 09:58:40 +0000, Daniel Berrange wrote:
On Mon, Mar 03, 2014 at 08:22:13AM +0000, Wangyufei (James) wrote:
Hello, I find that QEMU supports to set boot(QMP command "boot_set") order online, namely the virtual machine can be reboot in appointed order, but libvirt had no corresponding interface. So, I want to know if libvirt intend to support to set boot order online. If the answer is yes, I'll try to apply the patch. If no, why?
AFAIK, no one has looked at this.
NB, this will only work for guests actually using the old style boot order. Any guests using per-device boot indexes for ordering won't work with this command.
Hmm, looks like it's quite useless because libvirt uses per-device boot indexes whenever it is possible even if the domain XML used the old way of specifying boot order. Thus, it's very likely any domain running in a QEMU which is not ancient will be using per-device boot order.
Jirka
participants (3)
-
Daniel P. Berrange -
Jiri Denemark -
Wangyufei (James)