From 184c836a16e9954a2cba11ae21f07923077ec904 Mon Sep 17 00:00:00 2001 From: James Falcon Date: Mon, 19 Jul 2021 14:13:21 -0500 Subject: Initial hotplug support (#936) Adds a udev script which will invoke a hotplug hook script on all net add events. The script will write some udev arguments to a systemd FIFO socket (to ensure we have only instance of cloud-init running at a time), which is then read by a new service that calls a new 'cloud-init devel hotplug-hook' command to handle the new event. This hotplug-hook command will: - Fetch the pickled datsource - Verify that the hotplug event is supported/enabled - Update the metadata for the datasource - Ensure the hotplugged device exists within the datasource - Apply the config change on the datasource metadata - Bring up the new interface (or apply global network configuration) - Save the updated metadata back to the pickle cache Also scattered in some unrelated typing where helpful --- tools/hook-hotplug | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100755 tools/hook-hotplug (limited to 'tools') diff --git a/tools/hook-hotplug b/tools/hook-hotplug new file mode 100755 index 00000000..34e95929 --- /dev/null +++ b/tools/hook-hotplug @@ -0,0 +1,21 @@ +#!/bin/bash +# This file is part of cloud-init. See LICENSE file for license information. + +# This script checks if cloud-init has hotplug hooked and if +# cloud-init has finished; if so invoke cloud-init hotplug-hook + +is_finished() { + [ -e /run/cloud-init/result.json ] +} + +if is_finished; then + # open cloud-init's hotplug-hook fifo rw + exec 3<>/run/cloud-init/hook-hotplug-cmd + env_params=( + --devpath="${DEVPATH}" + --subsystem="${SUBSYSTEM}" + --udevaction="${ACTION}" + ) + # write params to cloud-init's hotplug-hook fifo + echo "${env_params[@]}" >&3 +fi -- cgit v1.2.3