Relay alerts from Amazon CloudWatch to a Slack room.

This code is 100% based on Amazon CloudWatch to Hipchat and it could not be possible without it.

Requirements:

• A Heroku account.
• A Slack Account.
• A Slack Incoming Webhook Token configured to post messages to the room you want.
• An Amazon AWS account with Amazon CloudWatch and Amazon SNS setup and enabled.

Deploy your application to to Heroku:

cd /path/to/wherever
git clone https://github.com/esanchezm/amazon-cloudwatch-to-slack.git

cd amazon-cloudwatch-to-slack
heroku apps:create
heroku config:set 'SLACK_WEBHOOK_URL=https://hooks.slack.com/services/XXXXXXXXX/XXXXXXXXX/XXXXXXXXXXXXXXXXXXXXXXXX'
git push heroku master

You can optionally set a diferent slack channel, username or avatar to customize messages:

heroku config:set SLACK_CHANNEL=#yourchannel\
                  SLACK_USERNAME="AWS CloudWatch" \
                  SLACK_ICON_URL="http://www.example.com/bot_avatar.png" \
                  SLACK_ICON_EMOJI=":ghost:"

Notice that SLACK_ICON_URL and SLACK_ICON_EMOJI are mutually exclusive.

Additional configuration parameters for SES notifications:

heroku config:set SLACK_SES_CHANNEL=#otherchannel\
                  SLACK_SES_USERNAME="AWS SES" \
                  SLACK_SES_ICON_URL="http://www.example.com/bot_avatar.png" \
                  SLACK_SES_ICON_EMOJI=":ghost:"

Or just push the button:

Setup Amazon SNS:

• Create a new Topic, or select an existing Topic
• Add a New Subscription to the topic
• Select HTTPS, and paste in your HTTPS URL to your Heroku application

Setup Amazon CloudWatch:

• Create or modify an alert
• Select the "Send Notification" action
• Select the SNS topic you created / updated in the previous step