The LXD container hypervisor. Info: https://www.ubuntu.com/containers/lxd

• Install LXD:

  apt-get install lxd

• Initialize LXD:

  lxd init

• Create a new containter:

  lxc launch ubuntu: <container-name>

  lxc launch images:centos/7/amd64 <container-name>

• List containers:

  lxc list
  +---------+---------+--------------------------------+-----------------------------------------------+------------+-----------+
  |  NAME   |  STATE  |              IPV4              |                     IPV6                      |    TYPE    | SNAPSHOTS |
  +---------+---------+--------------------------------+-----------------------------------------------+------------+-----------+
  | c1      | RUNNING | 1.2.3.4 (eth0)                 | fd42:dd7c:afec:9008:216:3eff:aaaa:aaaa (eth0) | PERSISTENT | 0         |  
  +---------+---------+--------------------------------+-----------------------------------------------+------------+-----------+
  | c2      | RUNNING | 1.2.3.5 (eth0)                 | fd42:dd7c:afec:9008:216:3eff:bbbb:bbbb (eth0) | PERSISTENT | 0         |
  +---------+---------+--------------------------------+-----------------------------------------------+------------+-----------+
  | c3      | RUNNING | 1.2.3.6 (eth0)                 | fd42:dd7c:afec:9008:216:3eff:cccc:cccc (eth0) | PERSISTENT | 0         |
  +---------+---------+--------------------------------+-----------------------------------------------+------------+-----------+

• Modify DHCP range:

  lxc network set lxdbr0 ipv4.dhcp.ranges 1.2.3.100-1.2.3.150

• Start shell in container:

  lxc exec c1 bash

Configure an unused interface for bridging with containers.

• Install bridge utilities:

  apt install bridge-utils

• Configure bridge interface:

  tee -a /etc/network/interfaces.d/br0 <<EOF
  auto br0
  iface br0 inet manual
   bridge_ports enp3s0
   bridge_stp off
   bridge_fd 0
   bridge_maxwait 0
  EOF

• Show default settings:

  lxc profile show default
  config: {}
  description: Default LXD profile
  devices:
    eth0:
      nictype: bridged
      parent: lxdbr0
      type: nic
    root:
      path: /
      pool: default
      type: disk
  name: default
  used_by: []

• Edit parent NIC:

  lxc profile edit default