Another 'networking issue' or 'how to connect containers to more than one network using a bridge or macvlan'

LXD
2

Hi,
I think this instructions will work to you in order to have a bridge mode with lxd:
In the host:

$ sudo apt-get update
$ sudo apt-get install bridge-utils

Create and configure the bridge:

$ sudo nano /etc/network/interfaces
auto lo
iface lo inet loopback
#auto enp0s3     <----------------- enp0s3 is the real NIC in my computer
#iface enp0s3 inet static
auto br0            <----------------- br0 is the name I use for the bridge interface
iface br0 inet static
       address 192.168.1.150
       netmask 255.255.255.0
       gateway 192.168.1.1
       dns-nameservers 8.8.8.8 8.8.4.4
       bridge_ports enp0s3   <----------- the real NIC is connect to the bridge
       bridge_stp off
       bridge_fd 0
       bridge_maxwait 0
$ sudo reboot

Now, the host has a new interface br0 working like a switch (where the containers will be able to connect it and work like a real computer in your lan)
Now, you have to create a new profile:

$ lxc profile copy default bridge
$ lxc profile edit bridge 
config: {}
description: bridge profile
devices:
  eth0:
    nictype: bridged
    parent: **br0**      <---- replace lxdbr0 with br0 in order to use the 'switch' br0
    type: nic
  root:
    path: /
    pool: lxd
    type: disk
name: default
used_by: []

Lastly, you must use the new profile:

$ lxc launch ubuntu:x c1 -p bridge    <-- to create a new container in bridge mode
$ lxc profile assign c1 bridge <-- to assign the profile to a existing container

The container must be correctly configurated with IP, MS, gateway and DNS to work in your lan. If it’s all correct, the container will be another computer in your lan.

If your host is a virtual machine in Virtualbox, you have to configure the network adapter in Virtualhost as bridge mode and Promiscuous mode - Allow all.

MACVLAN:
In the host, you don’t have to do anything in the network config but you have to create a new profile:

$ lxc profile copy default macvlan
$ lxc edit macvlan
description:  macvlan profile
devices:
  eth0:
    nictype: **macvlan** <--- replace bridged with macvlan 
    parent: enp0s3
    type: nic
  root:
    path: /
    pool: lxd
    type: disk
name: macvlan
used_by: []

Now the same as before, you must use the new profile:

$ lxc launch ubuntu:x c1 -p macvlan    <-- to create a new container in macvlan mode
$ lxc profile assign c1 macvlan <-- to assign the profile to a existing container

The container must be correctly configurated with IP, MS, gateway and DNS to work in your lan. If it’s all correct, the container will be another computer in your lan; nevertheless, container and host will not be able to talk among them.
Mode macvlan did not work for me in Virtualbox (I tried it a few months ago).

I suppose that you are not working with wifi. If you are working with wifi, neither the bridge nor the macvlan, will work.

Salutes

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