/etc/dhcp/dhclient-exit-hooks.d/hook-dhclient is in cloud-init 18.2-14-g6d48d265-0ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | #!/bin/sh
# This file is part of cloud-init. See LICENSE file for license information.
# This script writes DHCP lease information into the cloud-init run directory
# It is sourced, not executed. For more information see dhclient-script(8).
is_azure() {
local dmi_path="/sys/class/dmi/id/board_vendor" vendor=""
if [ -e "$dmi_path" ] && read vendor < "$dmi_path"; then
[ "$vendor" = "Microsoft Corporation" ] && return 0
fi
return 1
}
is_enabled() {
# only execute hooks if cloud-init is enabled and on azure
[ -e /run/cloud-init/enabled ] || return 1
is_azure
}
if is_enabled; then
case "$reason" in
BOUND) cloud-init dhclient-hook up "$interface";;
DOWN|RELEASE|REBOOT|STOP|EXPIRE)
cloud-init dhclient-hook down "$interface";;
esac
fi
|