tony at specialistdevelopment.com
2010-Dec-15 12:06 UTC
[libvirt-users] KVM Virtualisation, Console output no longer working
Hi,
I used to use KVM for virtualisation and have now moved back to it, but I
have a problem.
When i used to install the guest machine with virt-install i used to use
the -x "extra args" part to set the console for the install and guest,
but
it no longer works.
Here is the command i use:
virt-install -n server01 -r 512 --os-variant=virtio26 -c /isos/c5u5.iso
--nographics --noautoconsole -f /storage/vm/server01 -s 5 bus=virtio -w
bridge:br0 -x "console=ttyS0 ks=http://www.domain.com/c5u5.cfg"
As you can see im setting the console to ttyS0, but then when i go to
connect to the console with:
virsh console server01
it either wont connect or comes up with: error: Failed to get local hostname
Here is a dump of the xml, but no mention of ttyS0 either.
<domain type='qemu' id='5'>
<name>server01</name>
<uuid>5991cf85-db6c-2b87-b76d-07a0caae77b9</uuid>
<memory>524288</memory>
<currentMemory>524288</currentMemory>
<vcpu>1</vcpu>
<os>
<type arch='x86_64'
machine='rhel5.4.0'>hvm</type>
<boot dev='cdrom'/>
</os>
<features>
<acpi/>
<apic/>
<pae/>
</features>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>destroy</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/libexec/qemu-kvm</emulator>
<disk type='file' device='disk'>
<driver name='qemu' cache='none'/>
<source file='/storage/vm/server01'/>
<target dev='hda' bus='ide'/>
</disk>
<disk type='file' device='cdrom'>
<source file='/isos/c5u5.iso'/>
<target dev='hdc' bus='ide'/>
<readonly/>
</disk>
<interface type='bridge'>
<mac address='54:52:00:61:ea:78'/>
<source bridge='br0'/>
<target dev='vnet0'/>
</interface>
<serial type='pty'>
<source path='/dev/pts/2'/>
<target port='0'/>
</serial>
<console type='pty' tty='/dev/pts/2'>
<source path='/dev/pts/2'/>
<target port='0'/>
</console>
</devices>
</domain>
Can anyone shed any light on this as im totally stuck.
Daniel P. Berrange
2010-Dec-15 12:16 UTC
[libvirt-users] KVM Virtualisation, Console output no longer working
On Wed, Dec 15, 2010 at 12:06:27PM -0000, tony at specialistdevelopment.com wrote:> Hi, > > I used to use KVM for virtualisation and have now moved back to it, but I > have a problem. > > When i used to install the guest machine with virt-install i used to use > the -x "extra args" part to set the console for the install and guest, but > it no longer works. > > Here is the command i use: > > virt-install -n server01 -r 512 --os-variant=virtio26 -c /isos/c5u5.iso > --nographics --noautoconsole -f /storage/vm/server01 -s 5 bus=virtio -w > bridge:br0 -x "console=ttyS0 ks=http://www.domain.com/c5u5.cfg" > As you can see im setting the console to ttyS0, but then when i go to > connect to the console with:You are doing a CDROM based install. The kernel args for that are set in the syslinux config file inside the ISO image and can't be overriden using -x. The -x arg only works when doing a kernel+initrd install (ie --location instead of --cdrom/-c) Daniel