Requirements
- existing S3 bucket and DynamoDB table for storing terraform state and enable terraform locking
Testing
Assuming you have already setup all required AWS credentials, you can test the lambda function with the following command and payload:
aws lambda invoke --cli-binary-format raw-in-base64-out --function-name demicon --payload '{ "resource": "", "bucket": "josegaspar-terraform-state", "tfstate": "terraform.tfstate" }' response.jon
In this case response.json will contain all the outputs from terraform since no resource name was provided in the payload:
{"message": ["alb_id = \"arn:aws:elasticloadbalancing:eu-west-1:510200864357:loadbalancer/app/my-alb/538c9c639803a5c3\"\n", "alb_name = \"my-alb-55784350.eu-west-1.elb.amazonaws.com\"\n", "lambda_function_arn = \"arn:aws:lambda:eu-west-1:510200864357:function:demicon\"\n"]}
The lambda function also accepts the name of a given terraform output to be printed out. In this example we want the name of a ALB:
aws lambda invoke --cli-binary-format raw-in-base64-out --function-name demicon --payload '{ "resource": "alb_name", "bucket": "josegaspar-terraform-state", "tfstate": "terraform.tfstate" }' response.jon
Response:
{"message": ["\"my-alb-55784350.eu-west-1.elb.amazonaws.com\"\n"]}