SDN model with iproute2 (w/o Open vSwitch)

[araobp]

I don't want to run OVSDB in my containers any longer to simplify the architecture.

I just use Linux bridges and Linux-native tunnels such as tuntap or VXLAN.

Something like this:

[araobp]

However, using MACVLAN is more practical.

[araobp]

$ modprobe macvlan
$ lsmod | grep macvlan
macvlan                16088  0
$ docker inspect --format '{{.State.Pid}}' lf6
1282
$ docker inspect --format '{{.State.Pid}}' lf5
977
$ nsenter  -t 1282 -n date
Sun Mar 20 15:35:52 CET 2016
$ ln -s /proc/1282/ns/net /var/run/netns/lf6
$ ln -s /proc/977/ns/net /var/run/netns/lf5
$ ip netns show
lf5
lf6
$ ip link add link eth0 dev macvlan-lf5 type macvlan
$ ip link add link eth0 dev macvlan-lf6 type macvlan
$ ip link set dev macvlan-lf5 netns lf5
$ ip link set dev macvlan-lf6 netns lf6
$ nsenter -t 1282 -n ip link show dev macvlan-lf6
20: macvlan-lf6@ovs-system: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default
    link/ether 6e:9c:fd:d8:eb:4b brd ff:ff:ff:ff:ff:ff

root@lf5:~# ip link set macvlan-lf5 name eth1 mode bridge
root@lf5:~# ip addr add 192.168.57.100/24 dev eth1
root@lf5:~# ip link set dev eth1 up

root@lf6:~# ip link set macvlan-lf6 name eth1 mode bridge
root@lf6:~# ip addr add 192.168.57.101/24 dev eth1
root@lf6:~# ip link set dev eth1 up

[araobp]

IPROUTE2 cheat sheet: http://baturin.org/docs/iproute2/

[araobp]

At first, I have made this (GRE over docker0): dfa6e78

[araobp]

netns is supported by this commit: a5b3abf