deploy-bluegreen.yml

---
platform: linux
image_resource:
  type: docker-image
  source:
    repository: "python"
    tag: "2.7.13-alpine"

params:
  TF_PROJECT_FOLDER:
  TF_VERSION: "0.12.0"
  AWS_DEFAULT_REGION: eu-west-1
  TF_ENVIRONMENT:
  ASSUME_ROLE_ARN:

inputs:
- name: terraform-repo
- name: terraform-bluegreen
- name: ami

run:
  path: sh
  args:
  - -exc
  - |
    # Install dependencies
    apk add --update unzip curl jq git

    # Install terraform
    curl -s -o "terraform.zip" "https://releases.hashicorp.com/terraform/${TF_VERSION}/terraform_${TF_VERSION}_linux_amd64.zip"
    unzip terraform.zip
    export PATH=$PATH:$PWD

    # Install dependencies of the deployment script
    pip install -r terraform-bluegreen/requirements.txt

    # Install awscli
    pip install awscli

    # Extract AMI id from packer manifest
    AMI_ID=$(cat ami/packer_manifest.json | jq -r ".last_run_uuid as \$last_run_uuid | .builds | map(select(.packer_run_uuid == \$last_run_uuid))[0].artifact_id" | cut -d: -f2)

    WORKDIR=$PWD
    cd terraform-repo/$TF_PROJECT_FOLDER
    # Init terraform
    terraform init
    terraform workspace select $TF_ENVIRONMENT
    # Deploy
    $WORKDIR/terraform-bluegreen/bluegreen.py -f $WORKDIR/terraform-repo/$TF_PROJECT_FOLDER -a $AMI_ID -c "apply -auto-approve" -t 500 -e $WORKDIR/terraform-repo/$TF_PROJECT_FOLDER/$TF_ENVIRONMENT.tfvars -r $ASSUME_ROLE_ARN