[dpdk-users] VIRTIO for containers

[王志克]

Thanks Jianfeng.

I finally realized that I used DPDK16.11 which does NOT support this function.

Then I use latest DPDK (17.05.2) and OVS (2.8.1), but still does not work.

ovs-vsctl add-port br0 virtiouser0 -- set Interface virtiouser0 type=dpdk options:dpdk-devargs=virtio_user0,path=/dev/vhost-net
ovs-vsctl: Error detected while setting up 'virtiouser0': could not add network device virtiouser0 to ofproto (No such device).  See ovs-vswitchd log for details.
ovs-vsctl: The default log directory is "/var/log/openvswitch".

lsmod |grep vhost
vhost_net              18152  0
vhost                  33338  1 vhost_net
macvtap                22363  1 vhost_net
tun                    27141  6 vhost_net

2017-10-23T19:00:42.743Z|00163|netdev_dpdk|INFO|Device 'virtio_user0,path=/dev/vhost-net' attached to DPDK
2017-10-23T19:00:42.743Z|00164|netdev_dpdk|WARN|Rx checksum offload is not supported on port 2
2017-10-23T19:00:42.743Z|00165|netdev_dpdk|ERR|Interface virtiouser0 MTU (1500) setup error: Invalid argument
2017-10-23T19:00:42.743Z|00166|netdev_dpdk|ERR|Interface virtiouser0(rxq:1 txq:1) configure error: Invalid argument
2017-10-23T19:00:42.743Z|00167|dpif_netdev|ERR|Failed to set interface virtiouser0 new configuration
2017-10-23T19:00:42.743Z|00168|bridge|WARN|could not add network device virtiouser0 to ofproto (No such device)

Which versions (dpdk and ovs) are you using? Thanks

Br,
Wang Zhike

From: Tan, Jianfeng [mailto:jianfeng.tan at intel.com]
Sent: Saturday, October 21, 2017 12:55 AM
To: 王志克; avi.cohen at huawei.com; dpdk-ovs at lists.01.org; users at dpdk.org
Subject: Re: VIRTIO for containers


Hi Zhike,

On 10/20/2017 5:24 PM, 王志克 wrote:
I read this thread, and try to do the same way (legacy containers connect to ovs+dpdk). However, I meet following error when creating ovs port.

ovs-vsctl add-port br0 virtiouser0 -- set Interface virtiouser0 type=dpdk options:dpdk-devargs=net_virtio_user0,path=/dev/vhost-net
ovs-vsctl: Error detected while setting up 'virtiouser0': Error attaching device 'net_virtio_user0,path=/dev/vhost-net' to DPDK.  See ovs-vswitchd log for details.
ovs-vsctl: The default log directory is "/var/log/openvswitch".

It should not try to connect this file /dev/vhost-net if this file exists, instead it will use ioctls on it. So please check if you have vhost and vhost-net ko probed into kernel.

Thanks,
Jianfeng



Debug shows that it calls virtio_user_dev_init()->vhost_user_setup(), and failed in connect() with target /dev/vhost-net. The errno is ECONNREFUSED.
Below command indeed shows no one is listening.
lsof | grep vhost-net

In kernel OVS, I guess qemu-kvm would listne to /dev/vhost-net. But for ovs_dpdk and container, what extra work need be done? Appreciate any help.

Br,
Wang Zhike