On Tue, Jun 20, 2017 at 10:57:34AM +0100, Narunas Krasauskas wrote: > Hi Pavel, > > I've found a blog post, which claims otherwise, here's excerpt from it: > > The <qemu:commandline> domain XML tagThere is a special namespace for > QEMU-specific tags in libvirt domain XML. You > cannot use QEMU-specific tags without first declaring the namespace. To > enable > it use the following: > > <domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'> > > > Now you can *add command-line arguments* to the QEMU invocation. For > example, to load an option ROM with -option-rom: > > <qemu:commandline> > <qemu:arg value='-option-rom'/> > <qemu:arg value='path/to/my.rom'/> > </qemu:commandline> > > > It is also possible to *add environment variables* to the QEMU invocation: > > <qemu:commandline> > <qemu:env name='MY_VAR' value='my_value'/> > </qemu:commandline> > > > > Can you please comment regarding this approach? This is only for testing purposes and they are unsupported so you are on your own :) [1]. So if you think that this is a valid feature and could be useful, you should create a new bug to track it and give it a chance to have it properly implemented in libvirt and virt-manager/virt-install/virt-xml. Anyway, it's possible to set this only via virt-xml/virt-install, this will never be implemented into the virt-manager GUI. Refer to man virt-xml and man virt-install and look for "qemu-commandline". TL;DR this should work for you: when installing new guest using virt-install: virt-install ... --qemu-commandline="-fw_cfg name=opt/com.coreos/config,file=some/file.json" or to modify existing domain: virt-xml DOMAIN-NAME --edit --qemu-commandline="-fw_cfg name=opt/com.coreos/config,file=some/file.json" Pavel [1] <http://libvirt.org/drvqemu.html#qemucommand> > > > Regards > > Narunas > > > > > On Tue, Jun 20, 2017 at 10:44 AM, Pavel Hrdina <phrdina@xxxxxxxxxx> wrote: > > > On Tue, Jun 20, 2017 at 10:20:01AM +0100, Narunas Krasauskas wrote: > > > Is there a way to load *fw_cfg* file in *virt-manager* (v1.4.1)? > > > > > > On the plain *QEMU* command line I can do it like so: > > > > > > -fw_cfg name=opt/com.coreos/config,file=some/file.json > > > > > > I cannot find equivalent option in the *virt-manager*. > > > > > > Thanks, Narunas > > > > Hi, no there is no way to use *fw_cfg* in virt-manager. Virt-manager > > controls libvirt an this is not even implemented in libvirt. > > > > To allow setting it via virt-manager/virt-xml/virt-install it needs > > to be implemented in libvirt as well. > > > > Feel free to create a Bug to track this feature, both libvirt and > > virt-manager uses this site to track bugs [1]. As a product you should > > select "Virtualization Tools" and component is libvirt or virt-manager. > > > > Pavel > >
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