StackNag

StackNag is a simple Slack integration that:

• Sends notifications about running OpsWorks stacks, the hourly costs of their associated resources, and "total usage" cost that includes resources from non-running stacks (ebs volumes, rds instances, s3 buckets, etc).
• Generates AWS cost metrics and posts these metrics to CloudWatch. Currently it publishes metrics for hourly cost breakdowns by service, as well as a total hourly cost, number of running stacks and total stacks.

Setup

1. Follow the instructions to create a Slack App and generate an Incoming Webhook URL:

   https://api.slack.com/incoming-webhooks

   Create a webhook for each slack channel you would like to post to.

2. Copy example.env to .env and fill it in.

3. (Optional) run invoke -l to see a list of all available tasks + descriptions

4. Create the S3 a bucket to hold the Lambda code if it does not already exist.

5. Run invoke stack.create to create the CloudFormation stack. For the prod version you must set AWS_PROFILE=prod (or whatever your prod credentials profile is called).