OpenWRT LXD Gateway on bare Ubuntu OS

Default LAN IP: 192.168.1.1
Default Credentials:
Username: root
Password: admin

Tested on Ubuntu Bionic 18.04 LTS
Instructions intended for use on clean Ubuntu OS with one physical nic port (ens3 in this guide)
NOTICE: No previous configuration of network/ovs/lxd accounted for.

00. Add CCIO remote

lxc remote add ccio https://images.braincraft.io --public --accept-certificate

01. Install Packages

apt update && apt upgrade -y && apt dist-upgrade -y
apt install -y openvswitch-switch ifupdown lxd

02. Eliminate netplan due to ovs support (BUG: 1728134)

sed 's/^/#/g' /etc/netplan/*.yaml

03. Create default "interfaces" file

cat <<EOF >/etc/network/interfaces
# /etc/network/interfaces
auto lo                                                                                   
iface lo inet loopback

# Run interfaces.d config files
source /etc/network/interfaces.d/*.cfg
EOF

04. Create wan bridge interfaces file

cat <<EOF >/etc/network/interfaces.d/wan.cfg
allow-hotplug wan
iface wan inet manual
EOF

05. Create ens3 interfaces file

(Substitute 'ens3' for your devices physical port)

cat <<EOF >/etc/network/interfaces.d/ens3.cfg
# Raise ens3 on ovs-br 'wan' with no IP
allow-hotplug ens3
iface ens3 inet manual
EOF

06. Create lan bridge interfaces file

cat <<EOF >/etc/network/interfaces.d/lan.cfg
allow-hotplug lan
iface lan inet manual
EOF

07. Create mgmt0 interfaces file

cat <<EOF >/etc/network/interfaces.d/mgmt0.cfg
# Raise host mgmt0 iface on ovs-br 'lan' with no IP
allow-hotplug mgmt0
iface mgmt0 inet static
  address 192.168.1.5
  gateway 192.168.1.1
  netmask 255.255.255.0
  nameservers 192.168.1.1
  mtu 1500
EOF

08. Create WAN Bridge && add WAN port to bridge

ovs-vsctl add-br wan -- add-port wan ens3

09. Generate unique MAC address for mgmt0 iface

export HWADDRESS=$(echo "$HOSTNAME lan mgmt0" | md5sum | sed 's/^\(..\)\(..\)\(..\)\(..\)\(..\).*$/02\\:\1\\:\2\\:\3\\:\4\\:\5/')

10. Create LAN Bridge && add LAN Host MGMT0 Virtual Interface to Bridge

ovs-vsctl add-br lan -- add-port lan mgmt0 -- set interface mgmt0 type=internal -- set interface mgmt0 mac="$HWADDRESS"

11. Initialize LXD

cat <<EOF | lxd init --preseed
config:
  images.auto_update_interval: "0"
cluster: null
networks: []
storage_pools:
- config:
    size: 15GB
  description: ""
  name: default
  driver: btrfs
profiles:
- config: {}
  description: ""
  devices:
    eth0:
      name: eth0
      nictype: macvlan
      parent: lan
      type: nic
    root:
      path: /
      pool: default
      type: disk
  name: default
EOF

12. Create OpenWRT LXD Profile

lxc profile copy default openwrt
lxc profile set openwrt security.privileged true
lxc profile device set openwrt eth0 parent wan
lxc profile device add openwrt eth1 nic nictype=bridged parent=lan

13. Launch Gateway

lxc launch bcio:openwrt gateway -p openwrt

14. Watch container for eth0 & br-lan ip initialization

"ctrl + c" to exit "watch" cmd

watch -c lxc list

15. Reboot host system & inherit!

reboot

FINISHED!!

Find your WebUI in a lan side browser @ 192.168.1.1

ProTip:

Use as physical network gateway by adding 2nd physical NIC to ovs bridge 'lan'
(Substitute 'ens6' for your devices physical port)

Create ifupdown config for physical lan port

cat <<EOF >/etc/network/interfaces.d/ens6.cfg
# Raise ens6 on ovs-br 'wan' with no IP
allow-hotplug ens6
iface ens6 inet manual
EOF

Add physical lan port to ovs bridge 'lan'

ovs-vsctl add-port lan ens6