[dpdk-users] docker container, EAL: failed to initialize virtio_user0 device

Wu, Xiaoban Xiaoban_Wu at student.uml.edu
Sun May 21 05:53:48 CEST 2017

Hi DPDK Users,

I am trying to use docker container and ovs(2.6.0)-dpdk(16.07) to setup a test. I want to setup two docker containers, each of them will use a virtual device (socket) created by the ovs-dpdk. The final purpose would let the two containers talk to each other.

Setup ovs-dpdk

  1.  ovsdb-tool create $ovs-dir/etc/openvswitch/conf.db $ovs-dir/share/openvswitch/vswitch.ovsschema
  2.  ovsdb-server --remote=punix:$ovs-dir/var/run/openvswitch/db.sock --remote=db:Open_vSwitch,Open_vSwitch,manager_options --pidfile --detach
  3.  ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-init=true
  4.  ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-socket-mem="512,512"
  5.  ovs-vswitchd  unix:$ovs-dir/var/run/openvswitch/db.sock --pidfile --detach  --log-file=$ovs-dir/temp.log

Setup bridge and ports

  1.  ovs-vsctl add-br br0 -- set bridge br0 datapath_type=netdev
  2.  ovs-vsctl add-port br0 vhost-user1 -- set Interface vhost-user1 type=dpdkvhostuser ofport_request=1
  3.  ovs-vsctl add-port br0 vhost-user2 -- set Interface vhost-user2 type=dpdkvhostuser ofport_request=2
  4.  ovs-ofctl add-flow br0 priority=1000,in_port=1,actions=output:2
  5.  ovs-ofctl add-flow br0 priority=1000,in_port=2,actions=output:1

Run the docker container

  1.  docker run -it --privileged -v $ovs-dir/var/run/openvswitch/vhost-user1:/var/run/usvhost -v /mnt/huge/:/dev/hugepages/ $docker-image bash

Run the dpdk application in the docker container

  1.  $dpdk-app -c 0x01 --socket-mem=128,0 --vdev=virtio_user0,path=/var/run/usvhost --file-prefix="docker1"

However, I encountered this error
PMD: vhost_user_setup(): connect error, Connection refused
PMD: virtio_user_dev_init(): backend set up fails
PMD: virtio_user_pmd_devinit(): virtio_user_dev_init fails
EAL: failed to initialize virtio_user0 device

It seems like the application in the docker container cannot connect the socket created by the ovs-dpdk.

Can anybody please help me and point out some possible solutions? Looking forward to your reply. Thanks very much for your help.

Best wishes,

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