Docker container connected by OVS+DPDK, `Ping` work but `iperf` NOT

问题

I am trying to build a platform using Docker, OVS+DPDK.

1. Set up DPDK + OVS

I set up DPDK+OVS using dpdk-2.2.0 with openvswitch-2.5.1. First, I compile the code of DPDK, set up hugepages. I do NOT bind NIC, because I don't get traffic from outside.

Then, I compile the code of openvswitch, set with-dpdk. Start up OVS with the following script:

#!/bin/sh
sudo rm /var/log/openvswitch/my-ovs-vswitchd.log*

export PATH=$PATH:/usr/local/share/openvswitch/scripts

export DB_SOCK=/usr/local/var/run/openvswitch/db.sock

sudo ovsdb-server --remote=punix:/usr/local/var/run/openvswitch/db.sock \
                     --remote=db:Open_vSwitch,Open_vSwitch,manager_options \
                     --private-key=db:Open_vSwitch,SSL,private_key \
                     --certificate=db:Open_vSwitch,SSL,certificate \
                     --bootstrap-ca-cert=db:Open_vSwitch,SSL,ca_cert \
                     --pidfile --detach

sudo ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-init=true

sudo ovs-vsctl set Open_vSwitch . other_config:pmd-cpu-mask=0x6

sudo ovs-vswitchd --dpdk -c 0x1 -n 4 -- unix:$DB_SOCK --pidfile --detach \
                        --log-file=/var/log/openvswitch/my-ovs-vswitchd.log

Everything works fine, my OVS is working now with DPDK support.

2. Create Docker container, and set up bridge and ports.

I use an Docker image from ubuntu:14.04 as follows:

#
# Ubuntu Dockerfile
#
# https://github.com/dockerfile/ubuntu
#

# Pull base image.
FROM ubuntu:14.04

# Install.
RUN \
  sed -i 's/# \(.*multiverse$\)/\1/g' /etc/apt/sources.list && \
  apt-get update && \
  apt-get -y upgrade && \
  apt-get install -y build-essential && \
  apt-get install -y software-properties-common && \
  apt-get install -y byobu curl git htop man unzip vim wget && \
  apt-get install -y iperf net-tools && \
  rm -rf /var/lib/apt/lists/*

# Add files.
ADD root/.bashrc /root/.bashrc
ADD root/.gitconfig /root/.gitconfig
ADD root/.scripts /root/.scripts

# Set environment variables.
ENV HOME /root

# Define working directory.
WORKDIR /root

# Install tcpreply
RUN apt-get update
RUN apt-get install -y libpcap-dev
ADD tcpreplay-4.3.2 /root/tcpreplay-4.3.2
WORKDIR /root/tcpreplay-4.3.2   
RUN ./configure
RUN make
RUN make install

# Copy pcap file
ADD test_15M /root/test_15M

# Define default command.
CMD ["bash"]

Then, I create one OVS bridge, i.e., ovs-br1, and two ports with ovs-docker using the script:

#!/bin/sh

sudo ovs-vsctl add-br ovs-br1 -- set bridge ovs-br1 datapath_type=netdev

sudo ifconfig ovs-br1 173.16.1.1 netmask 255.255.255.0 up

sudo docker run -itd --name="box1" "ubuntu14-tcpreplay:v1"

sudo docker run -itd --name="box2" "ubuntu14-tcpreplay:v1"

sudo ovs-docker add-port ovs-br1 eth1 box1 --ipaddress=173.16.1.2/24

sudo ovs-docker add-port ovs-br1 eth1 box2 --ipaddress=173.16.1.3/24

Now, I have one bridge ovs-br1, with two ports (no name). One is connected to box1 (container 1) and the other is connected to box2 (container 2).

3. Check the connection between box1 and box2

First, I dump flows of ovs-br1

wcf@wcf-OptiPlex-7060:~/ovs$ sudo ovs-ofctl dump-flows ovs-br1
NXST_FLOW reply (xid=0x4):
 cookie=0x0, duration=130.711s, table=0, n_packets=10, n_bytes=768, idle_age=121, priority=0 actions=NORMAL

Then, I go to box1 and ping box2

wcf@wcf-OptiPlex-7060:~/ovs$ sudo docker exec -it box1 "/bin/bash"
[ root@45514f0108a9:~/tcpreplay-4.3.2 ]$ ping 173.16.1.3     
PING 173.16.1.3 (173.16.1.3) 56(84) bytes of data.
64 bytes from 173.16.1.3: icmp_seq=1 ttl=64 time=0.269 ms
64 bytes from 173.16.1.3: icmp_seq=2 ttl=64 time=0.149 ms
64 bytes from 173.16.1.3: icmp_seq=3 ttl=64 time=0.153 ms
64 bytes from 173.16.1.3: icmp_seq=4 ttl=64 time=0.155 ms
64 bytes from 173.16.1.3: icmp_seq=5 ttl=64 time=0.167 ms
64 bytes from 173.16.1.3: icmp_seq=6 ttl=64 time=0.155 ms
^C
--- 173.16.1.3 ping statistics ---
6 packets transmitted, 6 received, 0% packet loss, time 4997ms
rtt min/avg/max/mdev = 0.149/0.174/0.269/0.045 ms

Things work fine. box1 can ping to box2.

Finally, I test the iperf between box1 and box2. I install iperf2 at both containers.

At box1:

[ root@45514f0108a9:~/tcpreplay-4.3.2 ]$ iperf -c 173.16.1.3 -u -t 5
------------------------------------------------------------
Client connecting to 173.16.1.3, UDP port 5001
Sending 1470 byte datagrams
UDP buffer size:  208 KByte (default)
------------------------------------------------------------
[  3] local 173.16.1.2 port 49558 connected with 173.16.1.3 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0- 5.0 sec   642 KBytes  1.05 Mbits/sec
[  3] Sent 447 datagrams
[  3] WARNING: did not receive ack of last datagram after 10 tries.

At box2:

[ root@2e19a616d2af:~/tcpreplay-4.3.2 ]$ iperf -s -u
------------------------------------------------------------
Server listening on UDP port 5001
Receiving 1470 byte datagrams
UDP buffer size:  208 KByte (default)
------------------------------------------------------------

The iperf packets from box1 do not get response from box2.

I use wireshark to monitor the ovs-br1 and two OVS ports of box1 and box2.

ovs-br1 does not view any traffic, however, both OVS ports view traffic. The screen shot of wireshark:

Thank you for sharing your idea.

Best wishes

来源：https://stackoverflow.com/questions/56539216/docker-container-connected-by-ovsdpdk-ping-work-but-iperf-not

标签

Docker