sls-oncall

Slack bot that fetches user oncall given a schedule in PagerDuty.

This version of the app was made in conjuntion with the Schibsted engineering article Slack bot with Serverless Framework.

Setup

Edit teams.json and add team name to schedule mappings

[
  {
    "name": "team-name",
    "schedules": ["P989K9X", "PYXYZ9N"],
    "tags": ["alternative-name"]
  }
]

Deployment

Make sure you have your credentials configured for the AWS CLI.

Before the first ever deploy in a environment, PagerDuty and Slack tokens need to be stored in AWS Parameter Store under AWS Systems Manager.

$ aws ssm put-parameter --region=eu-west-1 --name "/sls-oncall/pd-token" --type "SecureString" --value "<YOUR PD TOKEN>"
$ aws ssm put-parameter --region=eu-west-1 --name "/sls-oncall/slack-token" --type "SecureString" --value "<YOUR SLACK TOKEN>"
$ aws ssm put-parameter --region=eu-west-1 --name "/sls-oncall/slack-signsecret" --type "SecureString" --value "<YOUR SLACK SIGN SECRET>"

You also need to setup the Slack app and respond to the Slack challenge. Comment out async: true in the serverless.yml file and deploy. Once you have verified the url with Slack, comment it in and deploy again.

$ npx sls deploy --stage pro

Security

https://api.slack.com/docs/verifying-requests-from-slack