This repository provides two Jenkins pipeline custome steps for provisioning and deploying an AMI to a AWS auto scaling group and another one to perform rollbacks. Rolling updates are performed by the a-roller script.

The steps assume that:

• Packer is installed at /usr/bin/packer on the agent.
• AWS credentials are provided by the pipeline as environment variables AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY
• node.js 8 is installed on the agent

@Library('a-deploy') _

stage('Deploy') {
  steps {
    awsDeploy 'service-name', 'aws-region', 'auto-scaling-group-name'
  }
}

This will install the a-roller npm package, compress the node.js code of the of the workspace as a tar.gz file and provision an AMI called service-name $build-number with packer and ansible. Once the AMI is ready, the roller script will be executed to update the auto scaling group with the name auto-scaling-group-name in the region aws-region with the newly generated AMI.

stage('Deploy') {
  steps {
    awsRollback 'service-name', 'aws-region', 'auto-scaling-group-name', 'build-number'
  }
}

This will install the a-roller npm package and execute the roller script to update the auto scaling group with the AMI generated by the build number build-number.