GCE Instance Manager Slack bot

This script is used to run a Slack bot that coordinates with Google Compute Engine to manage shutdown of instances. It works well as a cron job scheduled on an always-on GCE instance (f1-micro).

Depends on:

slackclient

pip install slackclient

libcloud

pip install apache-libcloud

Much credit goes to https://www.fullstackpython.com/blog/build-first-slack-bot-python.html

Instructions

Create your slack bot

Refer to the above link for instructions on how to create a bot in slack. Follow the steps provided and be sure to create a bot user.

Create your token file

Create a token file that contains only the newly created bot user's "Bot User OAuth Access Token".

Modify the script

Modify the tokenFile variable to open the token file you just created.

Modify the slackChannel variable to be your desired channel's ID (see https://www.wikihow.com/Find-a-Channel-ID-on-Slack-on-PC-or-Mac).

Modify the projectID variable to be your GCP project's ID.

Run the script

Run with python gcp_shutdown.py.

Example