# Paired with cloud-init-hotplugd.socket to read from the FIFO
# /run/cloud-init/hook-hotplug-cmd which is created during a udev network
# add or remove event as processed by 10-cloud-init-hook-hotplug.rules.
# On start, read args from the FIFO, process and provide structured arguments
# to `cloud-init devel hotplug-hook` which will setup or teardown network
# devices as configured by user-data.
# Known bug with an enforcing SELinux policy: LP: #1936229
# cloud-init-hotplud.service will read args from file descriptor 3
[Unit]
Description=cloud-init hotplug hook daemon
After=cloud-init-hotplugd.socket
Requires=cloud-init-hotplugd.socket
ConditionPathExists=!/etc/cloud/cloud-init.disabled
ConditionKernelCommandLine=!cloud-init=disabled
[Service]
Type=simple
ExecStart=/bin/bash -c 'read args <&3; echo "args=$args"; \
exec /usr/bin/cloud-init devel hotplug-hook $args; \
exit 0'
SyslogIdentifier=cloud-init-hotplugd
TimeoutStopSec=5
All system for education purposes only. For more tools: Telegram @jackleet