libvirt users - Feb 2019 - Re: virsh confirmed edits do not persist

This may be user error, I am new to libvirt.

I am using libvirt 5.0.0. I have created a VM (win10) in the system URI
using virt-manager. I stopped the VM to edit it.

I set my LIBVIRT_DEFAULT_URI="qemu:///system" and am able to read the
domain configuration with `EDITOR=nano virsh edit win10`. When I save
(ctrl+o) and exit (ctrl+x) I see the message "Domain win10 XML
configuration edited." as expected. However, when I run the edit command
again the changes do not appear to have persisted.

I have tried starting and stopping the VM. I read that I may need to define
the domain with virsh so I did that. None of these things seem to work.

I would appreciate it if someone could help me solve this issue in order to
be able to modify domains from virsh!

Thanks in advance for any help!

Josh

On Thu, Feb 21, 2019 at 01:06:48AM -0500, Josh Mcneil
wrote:
>This may be user error, I am new to libvirt.
>
Welcome,
>I am using libvirt 5.0.0. I have created a VM (win10) in the system URI
>using virt-manager. I stopped the VM to edit it.
>
>I set my LIBVIRT_DEFAULT_URI="qemu:///system" and am able to read
the
>domain configuration with `EDITOR=nano virsh edit win10`. When I save
>(ctrl+o) and exit (ctrl+x) I see the message "Domain win10 XML
>configuration edited." as expected.
that means libvirt successfully parsed the changed XML file.
The elements libvirt does not parse will not appear in the changed
configuration. Usually those should get caught by the schema validation,
but it's not perfect.

What were the exact changes you were trying to make?
>However, when I run the edit command
>again the changes do not appear to have persisted.
>
>I have tried starting and stopping the VM. I read that I may need to define
>the domain with virsh so I did that. None of these things seem to work.
Calling 'virsh define' with the same domain name and UUID in the XML and
'virsh edit' is equivalent - both call virDomainDefineXMLFlags under the
hood.

Jano
>
>I would appreciate it if someone could help me solve this issue in order to
>be able to modify domains from virsh!
>
>Thanks in advance for any help!
>
>Josh
>_______________________________________________
>libvirt-users mailing list
>libvirt-users@redhat.com
>https://www.redhat.com/mailman/listinfo/libvirt-users

Thanks Ján!
>What were the exact changes you were trying to make?
I was following this guide:
https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF#Passing_keyboard/mouse_via_Evdev

Specifically, I was updating the domain tag to include `xmlns:qemu='
http://libvirt.org/schemas/domain/qemu/1.0'`
>both call virDomainDefineXMLFlags under the hood.
That is good to know, thanks for the explanation.

I appreciate the help, if you have any suggestions I'm happy to hear them

Josh

On Thu, Feb 21, 2019 at 2:16 AM Ján Tomko <jtomko@redhat.com> wrote:
> On Thu, Feb 21, 2019 at 01:06:48AM -0500, Josh Mcneil wrote:
> >This may be user error, I am new to libvirt.
> >
>
> Welcome,
>
> >I am using libvirt 5.0.0. I have created a VM (win10) in the system URI
> >using virt-manager. I stopped the VM to edit it.
> >
> >I set my LIBVIRT_DEFAULT_URI="qemu:///system" and am able to
read the
> >domain configuration with `EDITOR=nano virsh edit win10`. When I save
> >(ctrl+o) and exit (ctrl+x) I see the message "Domain win10 XML
> >configuration edited." as expected.
>
> that means libvirt successfully parsed the changed XML file.
> The elements libvirt does not parse will not appear in the changed
> configuration. Usually those should get caught by the schema validation,
> but it's not perfect.
>
> What were the exact changes you were trying to make?
>
> >However, when I run the edit command
> >again the changes do not appear to have persisted.
> >
> >I have tried starting and stopping the VM. I read that I may need to
> define
> >the domain with virsh so I did that. None of these things seem to work.
>
> Calling 'virsh define' with the same domain name and UUID in the
XML and
> 'virsh edit' is equivalent - both call virDomainDefineXMLFlags
under the
> hood.
>
> Jano
>
> >
> >I would appreciate it if someone could help me solve this issue in
order
> to
> >be able to modify domains from virsh!
> >
> >Thanks in advance for any help!
> >
> >Josh
>
> >_______________________________________________
> >libvirt-users mailing list
> >libvirt-users@redhat.com
> >https://www.redhat.com/mailman/listinfo/libvirt-users
>
>