New proposal for connection between Alcor Kubernetes Cluster and Distrinet

[VanderChen]

As mentioned in issue #33, vHosts in Distrinet are connected to a Linux bridge. An intuitive solution to connect k8s and vHosts is connecting the k8s pod to the same Linux bridge. Network Plugin in k8s provides this ability.

The work scheme of the CNI-Linux bridge is shown as follows.

Todo List:

• Change Alcor k8s ansible scripts to enable the CNI plugin.
• Test the connection between pods and LXD containers via Linux bridge.
• Combine Alcor Kubernetes Cluster and Distrinet.
• Test throughput performance.

cat >/etc/cni/net.d/10-mynet.conf <<EOF
{
        "cniVersion": "0.3.1",
        "name": "mynet",
        "plugins": [
          {
                "name": "mynet",
                "type": "bridge",
                "bridge": "cni0",
                "isGateway": true, 
                "ipam": {
                      "type": "host-local",
                      "subnet": "192.168.204.2/24",
                      "rangeStart": "192.168.204.0",
                      "rangeEnd": "192.168.204.254",
                      "routes": [
                               { "dst": "0.0.0.0/0" }
                       ]
                }
          }
        ]
}
EOF

[cj-chung]

I think there is an easier approach, like this:

[cj-chung]

You can refer to this link for how to assign IP address from LAN to a lxc container.
https://thenewstack.io/how-to-create-a-bridged-network-for-lxd-containers/

lxc config device add immune-whale eth0 nic nictype=bridged parent=br0 name=eth0

For the gateway, you also need to configure the iptables like this:

# iptables -F -t nat
# iptables -t nat -A POSTROUTING -o gw0-eth1 -j MASQUERADE
# iptables -A FORWARD -i eth0 -o gw0-eth1 -j ACCEPT
# iptables -A FORWARD -i gw0-eth1 -o eth0 -m state --state RELATED,ESTABLISHED -j ACCEPT