#!/bin/python3

# Requires the openstacksdk pip package - openstacksdk==4.0.0

import openstack
from urllib.request import urlopen
import json

# Initiate connection to the OpenStack API (get a token)
# Expects credentials to be available in "OS_"-prefixed env vars
conn = openstack.connect()

# Query the OpenStack metadata service to find the UUID of the instance we're currently running on
# see https://docs.openstack.org/nova/latest/user/metadata.html
response = urlopen("http://169.254.169.254/openstack/latest/meta_data.json")
json_data = json.loads(response.read())

# Here's where you could put other fun stuff, like an email/Slack notification to yourself

conn.compute.shelve_server(json_data["uuid"])