On 5/16/2019 3:04 PM, Joan Vidal wrote:
Hi,
I'm trying to use OVS-DPDK vhostuserclient ports with a qemu guest on a
CentOS host.
QEMU guest fails to start with the following error:
error: internal error: process exited while connecting to monitor:
2019-05-16T13:15:27.481680Z qemu-kvm: -chardev
socket,id=charnet2,path=/var/run/openvswitch/vhost0,server: Failed to
bind socket: Permission denied
2019-05-16T13:15:27.482078Z qemu-kvm: -chardev
socket,id=charnet2,path=/var/run/openvswitch/vhost0,server: chardev:
opening backend "socket" failed
Seems to be an issue with qemu-kvm permission to create the sockets in
/var/run/openvswitch
Followed this article
https://www.redhat.com/en/blog/ovs-dpdk-migrating-vhostuser-socket-mode-red-hat-openstack
But is showing same error. Even running qemu-kvm and openvswitch with
root is still returning Permission denied.
This is the system configuration:
--------------------------
Software versions:
(Host) CentOS Linux release 7.6.1810 (Core)
(Guest) CentOS Linux release 7.4.1708 (Core)
QEMU emulator version 1.5.3 (qemu-kvm-1.5.3-160.el7_6.1)
The minimum QEMU version recommended for use with vhostuserclient is
QEMU 2.7 (See OVS Documentation below).
http://docs.openvswitch.org/en/latest/topics/dpdk/vhost-user/#vhost-user-vs-vhost-user-client
Do you see the same issue when using QEMU 2.7?
Also from below it looks like you are using libvirt to configure QEMU?
If so have you followed the steps outlined in the link below
http://docs.openvswitch.org/en/latest/topics/dpdk/vhost-user/#adding-vhost-user-ports-to-the-guest-libvirt
Ian
ovs-vswitchd (Open vSwitch) 2.11.1
DPDK 18.11.0
--------------------------
OVS configuration
#ovs-vsctl show
462375d2-8f6a-4a72-ad49-af8c00720da9
Bridge br-subscriber
Port br-subscriber
Interface br-subscriber
type: internal
Port "ens1f0"
Interface "ens1f0"
type: dpdk
options: {dpdk-devargs="0000:81:00.0"}
Port "vhost0"
Interface "vhost0"
type: dpdkvhostuserclient
options: {vhost-server-path="/var/run/openvswitch/vhost0"}
Bridge br-internet
Port br-internet
Interface br-internet
type: internal
Port "vhost1"
Interface "vhost1"
type: dpdkvhostuserclient
options: {vhost-server-path="/var/run/openvswitch/vhost1"}
Port "ens1f1"
Interface "ens1f1"
type: dpdk
options: {dpdk-devargs="0000:81:00.1"}
ovs_version: "2.11.1"
#ovs-vsctl get Open_vSwitch . other_config
{dpdk-init="true", dpdk-socket-mem="0,2048", pmd-cpu-mask="0x02000200"}
#cat /etc/sysconfig/openvswitch
OPTIONS=""
OVS_USER_ID="openvswitch:hugetlbfs"
# ls -la /var/run/openvswitch/
total 12
drwxrwsr-x. 3 openvswitch hugetlbfs 260 May 16 12:00 .
drwxr-xr-x. 29 root root 920 May 16 12:14 ..
srwxr-x---. 1 openvswitch hugetlbfs 0 May 16 12:00 br-internet.mgmt
srwxr-x---. 1 openvswitch hugetlbfs 0 May 16 12:00 br-internet.snoop
srwxr-x---. 1 openvswitch hugetlbfs 0 May 16 12:00 br-subscriber.mgmt
srwxr-x---. 1 openvswitch hugetlbfs 0 May 16 12:00 br-subscriber.snoop
srwxr-x---. 1 openvswitch hugetlbfs 0 May 16 12:00 db.sock
drwx------. 3 openvswitch hugetlbfs 60 May 16 12:00 dpdk
srwxr-x---. 1 openvswitch hugetlbfs 0 May 16 12:00 ovsdb-server.21194.ctl
-rw-r--r--. 1 openvswitch hugetlbfs 6 May 16 12:00 ovsdb-server.pid
srwxr-x---. 1 openvswitch hugetlbfs 0 May 16 12:00 ovs-vswitchd.21250.ctl
-rw-r--r--. 1 openvswitch hugetlbfs 6 May 16 12:00 ovs-vswitchd.pid
-rw-r--r--. 1 root root 41 May 16 12:00 useropts
--------------------------
qemu configuration
#cat /etc/libvirt/qemu.conf
user = "qemu"
group = "hugetlbfs"
Vhostuser parameters used when starting guest with /usr/libexec/qemu-kvm
-chardev socket,id=charnet2,path=/var/run/openvswitch/vhost0,server
-netdev vhost-user,chardev=charnet2,id=hostnet2 -device
virtio-net-pci,netdev=hostnet2,id=net2,mac=0c:c4:7a:ea:4b:b2,bus=pci.0,addr=0x5
-chardev socket,id=charnet3,path=/var/run/openvswitch/vhost1,server
-netdev vhost-user,chardev=charnet3,id=hostnet3 -device
virtio-net-pci,netdev=hostnet3,id=net3,mac=0c:c4:7a:ea:4b:b3,bus=pci.0,addr=0x6
--------------------------
Logs
/var/log/openvswitch/ovs-vswitchd.log
2019-05-16T13:05:23.421Z|00142|dpdk|INFO|VHOST_CONFIG: vhost-user
client: socket created, fd: 62
2019-05-16T13:05:23.421Z|00143|netdev_dpdk|INFO|vHost User device
'vhost0' created in 'client' mode, using client socket
'/var/run/openvswitch/vhost0'
2019-05-16T13:05:23.421Z|00144|dpdk|WARN|VHOST_CONFIG: failed to connect
to /var/run/openvswitch/vhost0: No such file or directory
2019-05-16T13:05:23.421Z|00145|dpdk|INFO|VHOST_CONFIG:
/var/run/openvswitch/vhost0: reconnecting...
2019-05-16T13:05:23.421Z|00146|dpif_netdev|INFO|Core 9 on numa node 1
assigned port 'ens1f0' rx queue 0 (measured processing cycles 123318).
2019-05-16T13:05:23.421Z|00147|dpif_netdev|INFO|Core 25 on numa node 1
assigned port 'ens1f1' rx queue 0 (measured processing cycles 46293).
2019-05-16T13:05:23.421Z|00148|dpif_netdev|WARN|There's no available
(non-isolated) pmd thread on numa node 0. Queue 0 on port 'vhost0' will
be assigned to the pmd on core 25 (numa node 1). Expect reduced performance.
2019-05-16T13:05:23.421Z|00149|bridge|INFO|bridge br-internet: added
interface vhost0 on port 3
2019-05-16T13:05:58.525Z|00150|bridge|INFO|bridge br-internet: deleted
interface vhost0 on port 3
2019-05-16T13:05:58.525Z|00151|dpif_netdev|INFO|Core 9 on numa node 1
assigned port 'ens1f0' rx queue 0 (measured processing cycles 244368).
2019-05-16T13:05:58.525Z|00152|dpif_netdev|INFO|Core 25 on numa node 1
assigned port 'ens1f1' rx queue 0 (measured processing cycles 92211).
2019-05-16T13:06:08.335Z|00153|dpdk|INFO|VHOST_CONFIG: vhost-user
client: socket created, fd: 62
2019-05-16T13:06:08.335Z|00154|netdev_dpdk|INFO|vHost User device
'vhost1' created in 'client' mode, using client socket
'/var/run/openvswitch/vhost1'
2019-05-16T13:06:08.335Z|00155|dpdk|WARN|VHOST_CONFIG: failed to connect
to /var/run/openvswitch/vhost1: No such file or directory
2019-05-16T13:06:08.335Z|00156|dpdk|INFO|VHOST_CONFIG:
/var/run/openvswitch/vhost1: reconnecting...
Any idea will be apreciated, thanks!
*Joan Vidal*
*OmniAccess*
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