Deploy to OpsWorks using a Lambda function

Requirements

• AWS OpsWorks

• Stack Id

• App Id

• Running instances

• AWS Lambda

• AWS Api Gateway

Lambda function

Create a lambda function that actually connect to OpsWorks and do the deploy

Permissions

We need to create a new role to allow OpsWorks access. Create it and attach the policy with the minimun permissions to deploy, see the file deployOpsworksPolicy.json

Create a new lambda function, assign the recently created role and use the code in index.js The entry point is index.handler

Api Gateway

Then conect your lambda function with the outside world. Assign a new endpoint to your fuction.

Configuration

Create a POST endpoint without authentification. The authentification must be manual, due to bitbucket callback limitations.

Mapping request

Now, we need to map the HTTP request and transform it to event data for out Lambda. To do this, go to the endpoint Integration Request configuration and in Mapping templates create a new one using application/json as content type. Then, modify the template and put this code

$input.json('$')

This will parse the body raw and create a js object that will be the event parameter in the lambda function.

Deploy the API endpoint

After making the deployment of API endpoint, you will have an url like https://das76asdj.execute-api.eu-west-1.amazonaws.com/prod

The final url is that one adding at the end the name of your endpoint, so, for example https://das76asdj.execute-api.eu-west-1.amazonaws.com/prod/deployApi

Note: Take in account, that calling the API to non existing endpoint, or using bad method, return a "Authentification error"

Bitbucket

We already have the Lambda function and the API endpoint that we need to call. Now we need to call this endpoint from Bitbucket each time that we merge a pull request or we make a push to master

Go to the Bitbucket repository setting, to the Webhooks section and add a new one using the url to the lamda function. Choose as triggers

• Push
• Pull request merged

Now, every time we merge a pull request or push to master, bitbucket will call our API