On Mon, Mar 22, 2010 at 12:41:14PM -0700, Andrew Evans wrote:
> >> 
> > Do you have a bridge called 'eth0' for real? Try "brctl show" to verify.
> > RHEL5 as a default creates 'xenbr0', not 'eth0'.
> > 
>
> Well spotted! I don't have such a bridge, and I can't create one because
> eth0 is already an existing network interface name. I've changed my
> libvirt domU config to use xenbr0 instead of eth0. Not sure why this
> works with Xen 3.4.2 though.
>
Xen 3.4.x with the default configuration creates a bridge called 'eth0',
and renames the physical network adapter to peth0.
Xen 3.0.x and 3.1.x with the default configuration creates a bridge called 
'xenbr0',
and renames the physical network adapter to peth0, and also creates a separate
dom0 management only virtual interface called 'eth0'.
So it's just different defaults.
 
> My domU *still* isn't starting, though. xend-debug.log shows this traceback:
>
Are you sure you got the earlier xen 3.4.x stuff completely removed? 
Did you also make sure virt-manager, libvirt, virsh etc were downgraded 
to the RHEL5 default versions?
Dunno if the xml configuration created with newer libvirt is still compatible 
with the older libvirt/xen..
-- Pasi
> Traceback (most recent call last):
> File "/usr/lib64/python2.4/SocketServer.py", line 463, in
> process_request_thread
> self.finish_request(request, client_address)
> File "/usr/lib64/python2.4/SocketServer.py", line 254, in finish_request
> self.RequestHandlerClass(request, client_address, self)
> File "/usr/lib64/python2.4/SocketServer.py", line 521, in __init__
> self.handle()
> File "/usr/lib64/python2.4/BaseHTTPServer.py", line 316, in handle
> self.handle_one_request()
> File "/usr/lib64/python2.4/BaseHTTPServer.py", line 310, in
> handle_one_request
> method()
> File "/usr/lib64/python2.4/site-packages/xen/util/xmlrpclib2.py", line
> 66, in do_POST
> self.send_response(200)
> File "/usr/lib64/python2.4/BaseHTTPServer.py", line 367, in send_response
> self.wfile.write("%s %d %s\r\n" %
> File "/usr/lib64/python2.4/socket.py", line 256, in write
> self.flush()
> File "/usr/lib64/python2.4/socket.py", line 243, in flush
> self._sock.sendall(buffer)
> error: (32, 'Broken pipe')
>
> No idea if it's relevant or not. Certainly doesn't look good though.
>
> xend.log contains everyone's favorite, "Hotplug scripts not working":
>
> [2010年03月22日 19:28:38 xend 4863] ERROR (SrvBase:88) Request
> wait_for_devices failed.
> Traceback (most recent call last):
> File "/usr/lib64/python2.4/site-packages/xen/web/SrvBase.py", line 85,
> in perform
> return op_method(op, req)
> File
> "/usr/lib64/python2.4/site-packages/xen/xend/server/SrvDomain.py", line
> 72, in op_wait_for_devices
> return self.dom.waitForDevices()
> File "/usr/lib64/python2.4/site-packages/xen/xend/XendDomainInfo.py",
> line 2330, in waitForDevices
> self.waitForDevices_(c)
> File "/usr/lib64/python2.4/site-packages/xen/xend/XendDomainInfo.py",
> line 1422, in waitForDevices_
> return self.getDeviceController(deviceClass).waitForDevices()
> File
> "/usr/lib64/python2.4/site-packages/xen/xend/server/DevController.py",
> line 160, in waitForDevices
> return map(self.waitForDevice, self.deviceIDs())
> File
> "/usr/lib64/python2.4/site-packages/xen/xend/server/DevController.py",
> line 170, in waitForDevice
> raise VmError("Device %s (%s) could not be connected. "
> VmError: Device 0 (vif) could not be connected. Hotplug scripts not working.
>
> Device model log:
>
> $ cat qemu-dm.16544.log
> domid: 4
> qemu: the number of cpus is 7
> Change xvda to look like hda
> Change xvdb to look like hdb
> Change xvdc to look like hdc
> Watching /local/domain/4/logdirty/next-active
> Watching /local/domain/0/device-model/4/command
> xs_read(): vncpasswd get error.
> /vm/51711672-9512-4bd8-91ea-a1d542bbda92/vncpasswd.
> char device redirected to /dev/pts/1
> qemu_map_cache_init nr_buckets = 10000
> shared page at pfn effff
> buffered io page at pfn efffd
> xs_read(/vm/51711672-9512-4bd8-91ea-a1d542bbda92/rtc/timeoffset): read error
> I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0
> Triggered log-dirty buffer switch
> I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0
> I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0
> I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0
> I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0
> I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0
> I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0
>
> Current domU config (libvirt XML):
>
> <domain type='xen'>
> <name>foo</name>
> <memory>7340032</memory>
> <currentMemory>7340032</currentMemory>
> <vcpu>7</vcpu>
> <os>
> <type arch='x86_64' machine='xenfv'>hvm</type>
> <loader>/usr/lib/xen/boot/hvmloader</loader>
> <boot dev='hd'/>
> </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/lib64/xen/bin/qemu-dm</emulator>
> <disk type='block' device='disk'>
> <driver name='phy'/>
> <source dev='/dev/sys/lv0'/>
> <target dev='xvda' bus='xen'/>
> </disk>
> <disk type='block' device='disk'>
> <driver name='phy'/>
> <source dev='/dev/sys/lv1'/>
> <target dev='xvdb' bus='xen'/>
> </disk>
> <disk type='block' device='disk'>
> <driver name='phy'/>
> <source dev='/dev/sys/lv2'/>
> <target dev='xvdc' bus='xen'/>
> </disk>
> <interface type='bridge'>
> <mac address='00:50:56:0f:dd:02'/>
> <source bridge='xenbr0'/>
> <script path='vif-bridge'/>
> </interface>
> <serial type='pty'>
> <target port='0'/>
> </serial>
> <console type='pty'>
> <target port='0'/>
> </console>
> <input type='mouse' bus='ps2'/>
> <graphics type='vnc' port='-1' autoport='yes'/>
> </devices>
> </domain>
>
> thanks,
>
> -Andrew
>
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