mikesager

on server

add private key

wg genkey  | tee my_private | wg pubkey > my_public # both for Client and Server
ip link add wg0 type wireguard
ip addr add 192.168.2.2/24 dev wg0
wg set wg0 private-key ./my_private # server's private key
ip link set wg0 up

mikesager

If you've added some runcmd lines to your cloud-init config, and the commands don't seem to be executing, here's a few things you should know:

WTF is going on?

1. runcmd only has code to "shellify" your strings or array of strings (i.e: turns them into a shell script)
2. runcmd will only write a shell script into the file /var/lib/cloud/instance/scripts/runcmd
3. runcmd is part of the cloud_config_modules boot stage
4. You need to execute that runcmd shell script using the scripts-user module
5. scripts-user is part of the cloud_final_modules boot stage

mikesager

#!/usr/bin/env sh
# Copyright (c) 2015 Nathan Schulte

# set LOGIN and API_KEY below --
# see bottom for example use, in this case, checking and updating the default DNS A RR for a domain

# 0: request URI, e.g. '/dns/example.com/listRRs'
# 1..n: parameters
make_request () {
    LOGIN=''