[libvirt] Using Xen config files

[Matthew Donovan]

I'm still having problems with this.  I've dug around and found errors in
the qemu-dm log.

When I try to start the VM with libvirt, the error I'm getting is:
"xs_read(/vm/414e73de-cf1e-487c-87e0-d4ebf7a23576/rtc/timeoffset): read
error"

I did a xenstore-ls on the /vm/414e73de-cf1e-487c-87e0-d4ebf7a23576
directory and sure enough, rtc/timeoffset is not there.  When I start the VM
with the Xen config file I used to generate the XML the rtc/timeoffset is
there (timeoffset is set to "0").

Is there a way to set that in the XML?  I didn't see it in the online XML
description.

I'm using a slightly different XML description than I had originally so I've
included here (along with the Xen Config file)

Thanks!
-matthew

const char* foo = 
"<domain type='xen'>"
"<name>LinuxVM</name>"
"<uuid>414e73de-cf1e-487c-87e0-d4ebf7a23576</uuid>"
"<os>"
    "<type>hvm</type>"
    "<loader>/usr/lib/xen/boot/hvmloader</loader>"
    "<boot dev='hd'/>"
"</os>"
"<memory>512000</memory>"
"<vcpu>1</vcpu>"
"<on_shutdown>shutdown</on_shutdown>"
"<on_reboot>restart</on_reboot>"
"<on_crash>restart</on_crash>"
"<features>"
    "<pae/>"
    "<acpi/>"
    "<apic/>"
"</features>"
"<clock sync='localtime'/>"
"<devices>"
	"<emulator>/usr/lib/xen/bin/qemu-dm</emulator>"
	"<disk type='block'>"
	    "<source dev='/dev/vgvms/LinuxVM'/>"
	    "<target dev='hda'/>"
	"</disk>"
    "<interface type='ioemu'>"
        "<mac address='7A:AB:D0:01:82:98'/>"
    "</interface>"
    "<input type='tablet' bus='usb'/>"
    "<graphics type='sdl' password=''/>"
    "<serial type='pty'/>"
"</devices>"
"</domain>";
//serial = "pty" 


int main (int argc, char** argv) 
{
    virConnectPtr con;      /* connection to the Xen hypervisor */
    virDomainPtr  domain;

    virInitialize();

    con = virConnectOpen ("xen:///");
    if (!con) {
        virErrorPtr err = virGetLastError ();
        printf ("virConnectOpen failed: %s\n",
                err->message);
        return -1;
    }

    domain = virDomainDefineXML (con, foo);
    if (!domain) {
        virErrorPtr err = virConnGetLastError (con);
        printf ("virDomainDefineXML failed: %s\n",
                err->message);

    } else {
        
        if (virDomainCreate (domain) < 0) {
            virErrorPtr err = virConnGetLastError (con);
            printf ("virDomainCreate failed: %s\n",
                    err->message);
        } else {
            virDomainInfo info = {0};
            virDomainGetInfo (domain, &info);
            printf ("state = %d\n", info.state);
            getchar ();
        }
    }

    virConnectClose (con);
    return 0;
}

# Automatically generated xen config file
name = "LinuxVM"
builder = "hvm"
memory = "500"
disk = [ 'phy:/dev/vgvms/LinuxVM,hda,w', ]
vif = [ 'type=ioemu, mac=7A:AB:D0:01:82:98', ]
uuid = "414e73de-cf1e-487c-87e0-d4ebf7a23576"
device_model = "/usr/lib/xen/bin/qemu-dm"
kernel = "/usr/lib/xen/boot/hvmloader"
vnc=1 

vnc=0
sdl=1
stdvga=0

boot="cda"

usbdevice="tablet"

vncunused=1
apic=1
acpi=1
pae=1

vcpus=1
serial = "pty" 
on_reboot   = 'restart'
on_crash    = 'restart'





> -----Original Message-----
> From: Daniel P. Berrange [mailto:berrange at redhat.com] 
> Sent: Wednesday, August 20, 2008 1:05 PM
> To: Richard W.M. Jones
> Cc: Matthew Donovan; libvir-list at redhat.com
> Subject: Re: [libvirt] Using Xen config files
> 
> On Wed, Aug 20, 2008 at 04:44:04PM +0100, Richard W.M. Jones wrote:
> > On Wed, Aug 20, 2008 at 11:35:17AM -0400, Matthew Donovan wrote:
> > 
> > It certainly looks OK, and it seems like the domain should run after
> > virDomainCreate.  Have you tried adding a delay of 30 
> seconds just to
> > check if the domain is starting up slowly?
> 
> Yep, that debug suggests the libvirt part of creation has 
> completed OK.
> I think if anything is going wrong, its going to be in XenD's 
> arena. I'd
> recommend looking in /var/log/xen for any further hints of trouble
> 
> Daniel
> -- 
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>