Re: [libvirt] libvirt-libxl driver defaulting to tap disk and not working (ubuntu 12.10 + xen 4.5 + libvirt 1.2.3 + openstack)

Tian, Shuangtai wrote: > Hi, Jim > The blktap seems not a module in xen 4.5, when I tried the load it , can not find the module, is there something wrong I did? > It would be provided by your dom0 kernel, not Xen. The Ubuntu Xen kernel doesn't provide a blktap module?

Regards, Jim > BTW ,I compiled the xen4.5 by myself. > Thanks ! > > -----Original Message----- > From: Jim Fehlig [mailto:jfehlig@suse.com] > Sent: Friday, April 18, 2014 11:52 PM > To: Tian, Shuangtai > Cc: libvir-list(a)redhat.com > Subject: Re: [libvirt] libvirt-libxl driver defaulting to tap disk and not working (ubuntu 12.10 + xen 4.5 + libvirt 1.2.3 + openstack) > > Tian, Shuangtai wrote: > >> HI >> >> I am an openstacker, when I used the latest libvirt and xen code to >> run the openstack. Can not create the vm. >> >> there is an error in libxl log, you can see the log: >> >> Os : Ubuntu 12.10 >> >> >> >> Compiled against library: libvirt 1.2.3 >> >> Using library: libvirt 1.2.3 >> >> Using API: Xen 1.2.3 >> >> Running hypervisor: Xen 4.5.0 >> >> >> >> libxl: debug: libxl_create.c:1356:do_domain_create: ao 0x7f7894002810: >> create: how=(nil) callback=(nil) poller=0x7f7894001bb0 >> >> libxl: debug: libxl_device.c:251:libxl__device_disk_set_backend: Disk >> vdev=xvda spec.backend=tap >> >> libxl: debug: libxl_device.c:210:disk_try_backend: Disk vdev=xvda, >> backend tap unsuitable because blktap not available >> >> > > In addition to John's suggestions, try loading a blktap module in dom0. > It should work if a blktap driver is available. > > Regards, > Jim > > >> libxl: error: libxl_device.c:289:libxl__device_disk_set_backend: no >> suitable backend for disk xvda >> >> libxl: debug: libxl_event.c:1739:libxl__ao_complete: ao >> 0x7f7894002810: complete, rc=-3 >> >> libxl: debug: libxl_create.c:1370:do_domain_create: ao 0x7f7894002810: >> inprogress: poller=0x7f7894001bb0, flags=ic >> >> libxl: debug: libxl_event.c:1711:libxl__ao__destroy: ao >> 0x7f7894002810: destroy >> >> >> >> The blktap does work, and I also find the same error someone has >> posted, >> (http://www.redhat.com/archives/libvir-list/2013-February/msg01124.htm >> l) >> >> When I change the type to “phy”, it also doesnot work. And try to >> change the type to other options, also does not work. >> >> Can someone give me some suggestions? >> >> Thanks ! >> >> >> >> The XML from the openstack is : >> >> <domain type="xen"> >> >> <uuid>9e9ed86c-8892-40da-acd1-31ec6303abfe</uuid> >> >> <name>instance-00000001</name> >> >> <memory>524288</memory> >> >> <vcpu>1</vcpu> >> >> <os> >> >> <type>xen</type> >> >> >> <kernel>/opt/stack/data/nova/instances/9e9ed86c-8892-40da-acd1-31ec630 >> 3abfe/kernel</kernel> >> >> >> <initrd>/opt/stack/data/nova/instances/9e9ed86c-8892-40da-acd1-31ec630 >> 3abfe/ramdisk</initrd> >> >> <cmdline>ro root=/dev/xvda</cmdline> >> >> </os> >> >> <features> >> >> <acpi/> >> >> <apic/> >> >> </features> >> >> <clock offset="utc"/> >> >> <devices> >> >> <disk type="file" device="disk"> >> >> <driver name="tap2" type="raw" cache="none"/> >> >> <source >> file="/opt/stack/data/nova/instances/9e9ed86c-8892-40da-acd1-31ec6303a >> bfe/disk"/> >> >> <target bus="xen" dev="xvda"/> >> >> </disk> >> >> <disk type="file" device="cdrom"> >> >> <driver name="tap2" type="raw" cache="none"/> >> >> <source >> file="/opt/stack/data/nova/instances/9e9ed86c-8892-40da-acd1-31ec6303a >> bfe/disk.config"/> >> >> <target bus="ide" dev="xvdd"/> >> >> </disk> >> >> <interface type="bridge"> >> >> <mac address="fa:16:3e:d8:c3:c0"/> >> >> <source bridge="br100"/> >> >> <filterref >> filter="nova-instance-instance-00000001-fa163ed8c3c0"/> >> >> </interface> >> >> <console type="pty"/> >> >> <graphics type="vnc" autoport="yes" keymap="en-us" >> listen="127.0.0.1"/> >> >> <video> >> >> <model type="xen"/> >> >> </video> >> >> </devices> >> >> </domain> >> >> >> >> >> >> >> >> Best regards, >> >> Tian, Shuangtai >> >> >> >> ---------------------------------------------------------------------- >> -- >> >> -- >> libvir-list mailing list >> libvir-list(a)redhat.com >> https://www.redhat.com/mailman/listinfo/libvir-list >> -- libvir-list mailing list libvir-list(a)redhat.com https://www.redhat.com/mailman/listinfo/libvir-list