Open Stack

On 28 March 2016 at 05:21, N Vivekanandan <n.vivekanandan at ericsson.com>
wrote:

> Hi Openstack Team,
>
>
>
> We were trying to boot VMs via Openstack Nova (off Liberty release) into
> DPDK-enabled OVS instances.
>
> Our OVS is version 2.5  + DPDK 2.2 + Qemu 2.3 + Libvirt 1.2.16.
>
>
>
> We followed the guidelines here for installation of OVS Datapath and
> enable them for DPDK:
>
> https://github.com/openvswitch/ovs/blob/master/INSTALL.DPDK.md
>
>
>
> Howeve,r we were not able to get the VMs booted successfully via Nova.
>   When we attempted to boot the VMs , they went into error state.
>
> The vhostdpdkuser ports got created in the OVS-DPDK instance, but Libvirt
> Driver invoked by Nova, could not successfully attach this port to the VM.
>
>
>
> *We got these set of errors in libvirtd.log whenever we booted the VMs:*
>
> 2016-03-26 13:57:20.535+0000: 7354: error : virSecurityDriverLookup:80 :
> unsupported configuration: Security driver apparmor not enabled
>
> 2016-03-26 13:57:51.007+0000: 7339: error : virNetSocketReadWire:1520 :
> End of file while reading data: Input/output error
>
> 2016-03-26 13:58:36.293+0000: 7341: error : qemuMonitorOpenUnix:358 :
> failed to connect to monitor socket: No such process
>
> 2016-03-26 13:58:36.293+0000: 7341: error : qemuProcessWaitForMonitor:2113
> : internal error: process exited while connecting to monitor: 2016-03-*26T13:58:36.235874Z
> qemu-system-x86_64: -chardev
> socket,id=charnet0,path=/var/lib/libvirt/qemu/vhu189ade8e-3b: Failed to
> connect socket: Permission denied*
>
>
>
>
>
> *On the QEMU log:*
>
> 2016-03-26 13:58:35.479+0000: starting up libvirt version: 1.2.16,
> package: 1.2.16-2ubuntu11.15.10.4~cloud0, qemu version: 2.3.0 (Debian
> 1:2.3+dfsg-5ubuntu9.2~cloud0)
>
> LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin
> QEMU_AUDIO_DRV=none /usr/bin/kvm-spice -name instance-0000000c -S -machine
> pc-i440fx-vivid,accel=kvm,usb=off -m 512 -realtime mlock=off -smp
> 1,sockets=1,cores=1,threads=1 -uuid dbe34ace-960e-4915-884a-5a30b8ec896d
> -smbios type=1,manufacturer=OpenStack Foundation,product=OpenStack
> Nova,version=12.0.3,serial=00000000-0000-0000-0000-002590883f20,uuid=dbe34ace-960e-4915-884a-5a30b8ec896d,family=Virtual
> Machine -no-user-config -nodefaults -chardev
> socket,id=charmonitor,path=/var/lib/libvirt/qemu/instance-0000000c.monitor,server,nowait
> -mon chardev=charmonitor,id=monitor,mode=control -rtc
> base=utc,driftfix=slew -global kvm-pit.lost_tick_policy=discard -no-hpet
> -no-shutdown -boot strict=on -kernel
> /opt/stack/data/nova/instances/dbe34ace-960e-4915-884a-5a30b8ec896d/kernel
> -initrd
> /opt/stack/data/nova/instances/dbe34ace-960e-4915-884a-5a30b8ec896d/ramdisk
> -append root=/dev/vda console=tty0 console=ttyS0 -device
> piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive
> file=/opt/stack/data/nova/instances/dbe34ace-960e-4915-884a-5a30b8ec896d/disk,if=none,id=drive-virtio-disk0,format=qcow2,cache=none
> -device
> virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1
> -drive
> file=/opt/stack/data/nova/instances/dbe34ace-960e-4915-884a-5a30b8ec896d/disk.config,if=none,id=drive-ide0-1-1,readonly=on,format=raw,cache=none
> -device ide-cd,bus=ide.1,unit=1,drive=drive-ide0-1-1,id=ide0-1-1 -chardev
> socket,id=charnet0,path=/var/lib/libvirt/qemu/vhu189ade8e-3b -netdev
> type=vhost-user,id=hostnet0,chardev=charnet0 -device
> virtio-net-pci,netdev=hostnet0,id=net0,mac=fa:16:3e:bd:cb:d6,bus=pci.0,addr=0x3
> -chardev
> file,id=charserial0,path=/opt/stack/data/nova/instances/dbe34ace-960e-4915-884a-5a30b8ec896d/console.log
> -device isa-serial,chardev=charserial0,id=serial0 -chardev
> pty,id=charserial1 -device isa-serial,chardev=charserial1,id=serial1 -vnc
> 10.183.254.64:0 -k en-us -device cirrus-vga,id=video0,bus=pci.0,addr=0x2
> -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 -msg timestamp=on
>
> *2016-03-26T13:58:36.235874Z qemu-system-x86_64: -chardev
> socket,id=charnet0,path=/var/lib/libvirt/qemu/vhu189ade8e-3b: Failed to
> connect socket: Permission denied*
>
>
>
> We verified in our setup that we have given user/group as ‘root/root’ in
> etc/libvirt/qemu.conf and also
>
> affirmed that our ovs-vswitchd runs as ‘root’ with DPDK enabled.
>
>
>
> The ‘vhuxxx’ ports are appearing in /var/lib/libvirt/qemu which is the
> vsock_host_dir folder that we have configured
>
> for ovs-vswitchd as well as in Nova.
>
> srwxr-xr-x 1 root         root    0 Mar 26 20:12 vhu98c8f690-41
>
>
>
> But QEMU is not able to complete attaching the VM to the vhostdpdkuser
> port.
>
> We included "/var/lib/libvirt/qemu" which is the vhost_sock_dir into
> cgroup_device_acl as well.
>
>
>
> And we also tried to put ‘security_driver’ to ‘None’ in qemu.conf to see
> if that helps (just to remove any bearing on SELinux (or) apparmor), but
> that
>
> didn’t help either.
>
>
>
> Highly Appreciate any tips.
>
>
>
> --
>
> Thanks,
>
>
>
> Vivek
>

Hello,

Maybe you're facing this BUG:

Ownership/Permissions of vhost_user sockets for openvswitch-dpdk make them
unusable by libvirt/qemu/kvm:
https://bugs.launchpad.net/ubuntu/+source/openvswitch-dpdk/+bug/1546565

-
Thiago
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