Changing boot device for a QEMU-KVM virtual machine
Solution 1
If libvirt doesn't reload VM settings on start/stop, virsh edit
command may help. And please write entire XML file and libvirt version
Hmm... everything seems OK. Try adding
<boot dev='hd'/>
<boot dev='cdrom'/>
<bootmenu enable='yes'/>
to <os> section and look if cdrom appears in boot menu. Also try removing all <boot> records from <os> and adding
<boot order='1'/>
to <disk> section
Solution 2
If the VM is down, look for a stored saved image under /var/lib/libvirt/qemu/save - it will keep the old parameters alive, despite changes made via virsh edit. I deleted such image in a similar case where it kept looking for an non-existent network interface (and failing to boot due to this).
Comments
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NukaRakuForgotEmail over 1 year
I am trying to change the boot device for a VM. I go to the VM's XML file in
/etc/libvirt/qemu
and set<boot dev='cdrom' />
. Still, it attempts to boot from the harddrive instead of the cdrom.I know I have an ISO image loaded on the CD-ROM virtual device.
Am I not doing this correctly? I tried shutting down the VM completely and starting it back up to no avail. Perhaps I need to reload the settings somehow?
Edit:
By request of @Selivanov:
$ libvirtd --version libvirtd (libvirt) 0.8.7
And XML file:
<domain type='kvm'> <name>nimmy.example.com</name> <uuid>(SNIP)</uuid> <memory>524288</memory> <currentMemory>524288</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64' machine='rhel6.1.0'>hvm</type> <boot dev='cdrom'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/libexec/qemu-kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='none'/> <source file='/var/lib/libvirt/images/nimmy.img'/> <target dev='hda' bus='ide'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <source file='/home/nimmy/CentOS-6.0-x86_64-netinstall.iso'/> <target dev='hdc' bus='ide'/> <readonly/> <address type='drive' controller='0' bus='1' unit='0'/> </disk> <controller type='ide' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <interface type='network'> <mac address='(SNIP)'/> <source network='default'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes'/> <sound model='ac97'> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </sound> <video> <model type='cirrus' vram='9216' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </memballoon> </devices> </domain>
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NukaRakuForgotEmail over 12 yearsApparently, I had to close
virt-manager
for the settings to reload. Is this the usual case? Is there a way to reload the settings? Also, I'm confused as to why the settings invirt-manager
were not taking. -
Selivanov Pavel over 12 yearsYou may reload libvirt-bin service, if it's init script in your distributive supports this, for example in ubuntu:
sudo reload libvirt-bin
. If you edited xml file with external editor, this is normal. If you usedvirsh edit
or changed settings from virt-manager, this is bug. -
Admin almost 8 yearsIf you edit the XML file you need to reload the VM to effect the updates. /etc/init.d/libvirt-bin reload
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Philipp Ludwig over 3 years
virsh edit
just yieldserror: command 'edit' requires <domain> option
. -
Tornado726 over 2 years@PhilippLudwig, just add the name of your VM after the virsh edit command. The <domain> is the VM itself. For example, if your VM is named winserver2016, the command would be
virsh edit winserver2016
.