When I have done VXLAN, I did it with a controller. Remember VXLAN defines the
data plane, but not the control plane (Mac address, etc).
-----Original Message-----
From: discuss <ovs-discuss-boun...@openvswitch.org> On Behalf Of
i_j_e_...@yahoo.co.jp
Sent: Sunday, August 30, 2020 1:17 PM
To: ovs-discuss@openvswitch.org
Subject: [ovs-discuss] About VXLAN connecting container and physical machine
Hi.
I tried to establish L2 network between a docker container and a physical
machine by using vxlan of OVS. The container host is different from the
physical machine. So far, it is not successful. I'd like to have comments on
how to do this.
Here's the detail.
As shown in the figure and description below, there are five physical machines,
machine1, machine2, machine3, machine4, and machine5. On all of them are
running linux. Each of machine1, machine2 and machine3 has a OVS bridge.
Connection between docker2 and docker3 works fine. Connection between machine4
and machine5 also works fine. When ovsbr1 is down, machine4 and machine5
connection fails. Therefore, it is sure that ovsbr1 is forwarding packets
between machine4 and machine5.
However, connection between docker2 and machine4 is not established. Ping never
reaches between these. I dumped packets and found the following.
Docker2 ping to machine4 did not succeed, during which
a) arp requests arriveed on machine1 via the vxlan channel.
b) no arp request arrived on machine4.
Docker2 ping to docker3 succeeded, during which
c) arp requests arrived on machine3 via the vxlan channel.
d) arp requests arrived on docker3 and docker3 replied.
To summerize, OVS does not forward arp request comming from vxlan to its
connected physical ports in this configuration.
Please let me know how to establish connection between docker2 and machine4 in
this configuration.
Regards,
+-------+ +-------+
|docker2| |docker3|
+--+----+ +--+----+
|eth2 |eth3
| |
ovsbr2+--+--+ ovsbr3+--+--+
+-----------------+ +-------------+ +-------------+
| machine1 | | machine2 | | machine3 |
+---------------+-+ +----+--------+ +----+--------+
ovsbr1+-+--+ | | |
| | | | |
enp1s0f0+ +enp1s0f1 |enp3s0 enp0s3| enp0s3|
| \ +----------------+-----------------+
| \ physical switch
| \
|eth4 \eth5
+-----+----+ +----------+
| machine4 | | machine5 |
+----------+ +----------+
Machine1:
Three physical ports, enp1s0f0, enp1s0f1 and enp3s0.
A ovs switch named ovsbr1.
Enp1s0f[01] are logically connected to ovsbr1.
Enp1s0f0 is physically connected to machine4.
Enp1s0f1 is physically connected to machine5.
Enp3s0 is physically connected to the physical switch.
Machine2:
One physical port, enp0s3 which is connected to the physical switch.
One ovs switch named ovsbr2.
One docker container, named Docker0 on the machine, is connected to ovsbr2.
Machine3:
One physical port, enp0s3 which is connected to the physical switch.
One ovs switch named ovsbr3.
One docker container, named Docker1 on the machine, is connected to ovsbr3.
Machine4, Machine5:
Each has one physical port, whose names are eth4 and eth5 respectivly.
Eth4 is physically connect to enp1s0f0.
Eth5 is physically connect to enp1s0f1.
Ovsbr1 has a VXLAN port whose remote is ovsbr2.
Ovsbr2 has two VXLAN ports whose remote are ovsbr1 and ovsbr3.
Ovsbr3 has a VXLAN port whose remote is ovsbr2.
IPv4:
machine1:enp3s0 192.168.1.1/24
machine2:enp0s3 192.168.1.2/24
machine3:enp0s3 192.168.1.3/24
docker0:eth2 172.20.0.2/24
docker1:eth3 172.20.0.3/24
machine4:eth4 172.20.0.4/24
machine5:eth5 172.20.0.5/24
machine1# ovs-vsctl show
Bridge ovsbr0
Port vxlan1025.2
Interface vxlan1025.2
type: vxlan
options: {key="1025", remote_ip="192.168.1.2"}
Port ovsbr0
Interface ovsbr1
type: internal
Port enp1s0f1
Interface enp1s0f1
Port enp1s0f0
Interface enp1s0f0
ovs_version: "2.13.1"
machine2# ovs-vsctl show
Bridge ovsbr0
Port ovsbr0
Interface ovsbr0
type: internal
Port vxlan1025.1
Interface vxlan1025.1
type: vxlan
options: {key="1025", remote_ip="192.168.1.1"}
Port vxlan1025.3
Interface vxlan1025.3
type: vxlan
options: {key="1025", remote_ip="192.168.1.3"}
Port ba1e1f0927484_l
Interface ba1e1f0927484_l
ovs_version: "2.13.0"
machine3# ovs-vsctl show
Bridge ovsbr0
Port a2cedfb6beb34_l
Interface a2cedfb6beb34_l
Port vxlan1025
Interface vxlan1025.2
type: vxlan
options: {key="1025", remote_ip="192.168.1.2"}
Port ovsbr0
Interface ovsbr0
type: internal
ovs_version: "2.13.0"
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