Fedora 21 : install openvswitch (OVS) and configure internal bridge

Reference

https://kashyapc.fedorapeople.org/virt/openvswitch-and-libvirt-kvm.txt

http://networkstatic.net/install-open-vswitch-networking-red-hat-fedora-20

http://d.hatena.ne.jp/enakai00/20141121/1416551748

http://www.mylinuxplace.com/create-taptun-device-centos-7/

install openvswitch via yum and start the OVS.

# yum install openvswitch # systemctl status openvsiwtch.service * openvsiwtch.service   Loaded: not-found (Reason: No such file or directory)   Active: inactive (dead) # systemctl start openvswitch.service # systemctl status openvswitch.service * openvswitch.service - Open vSwitch   Loaded: loaded (/usr/lib/systemd/system/openvswitch.service; disabled)   Active: active (exited) since Wed 2015-01-14 01:20:45 JST; 1min 57s ago  Process: 11536 ExecStart=/bin/true (code=exited, status=0/SUCCESS) Main PID: 11536 (code=exited, status=0/SUCCESS)   CGroup: /system.slice/openvswitch.service # systemctl enable openvswitch.service Created symlink from /etc/systemd/system/multi-user.target.wants/openvswitch.service to /usr/lib/systemd/system/openvswitch.service. # ovs-vsctl show 575eac37-000f-4925-988d-8cb40a48c021    ovs_version: "2.3.1"

add a bridge

# ovs-vsctl add-br ovsbr0 # ovs-vsctl show 575eac37-000f-4925-988d-8cb40a48c021    Bridge "ovsbr0"        Port "ovsbr0"            Interface "ovsbr0"                type: internal    ovs_version: "2.3.1"

add an interface to VMs.

virsh edit <VM>

<interface type='bridge'>      <source bridge='ovsbr0'/>      <virtualport type='openvswitch'>      </virtualport> </interface>

start VMs.

# virsh start ubuntu1404-vm2 Domain ubuntu1404-vm2 started # virsh start ubuntu1404-vm3 Domain ubuntu1404-vm3 started

# ovs-vsctl show 575eac37-000f-4925-988d-8cb40a48c021    Bridge "ovsbr0"        Port "ovsbr0"            Interface "ovsbr0"                type: internal        Port "vnet10"            Interface "vnet10"        Port "vnet7"            Interface "vnet7"    ovs_version: "2.3.1"

VM1 (10.0.0.100 ) -- OVS -- VM2 (10.0.0.200)

confirm that each VM can communicate with the other.

send ping to VM2 from VM1.

# ping 10.0.0.200 -c 1 PING 10.0.0.200 (10.0.0.200) 56(84) bytes of data. 64 bytes from 10.0.0.200: icmp_seq=1 ttl=64 time=1.01 ms --- 10.0.0.200 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 1.011/1.011/1.011/0.000 ms