Add veth to LXC container

gistfile1.txt

function lxcaddveth() {

  local pid=$(lxc-info -n ${1} -p | awk '{print $2}')

  mkdir -p /var/run/netns
  ln -sf /proc/$pid/ns/net "/var/run/netns/${1}"

  ip link add name veth${2} type veth peer name veth${2}_c
  ip link set dev veth${2}_c netns ${1} name ${3}
  lxc-attach -n ${1} /sbin/ifconfig ${3} up
  /sbin/ifconfig veth${2} up
  brctl addif ${4} veth${2}
  lxc-attach -n ${1} dhclient ${3}

  rm -f "/var/run/netns/${1}"
}

example:
  - "my_container" is the target container for the new veth
  - "QwERTY" is a random string for the veth name on the host (do NOT use "QWERTY")
  - eth1 is the name of the veth in the container
  - br1 is the bridge to add the veth to on the host

  lxcaddveth my_container QWERTY eth1 br1