README.md

Exercise 2. Get private ip addresses for group of instances using API Gateway + Lambda

1. Create network infrastructure

   cd tf-vpc
   terraform plan
   terraform apply

   This will create VPC, private and public subnets.

   Apply complete! Resources: 11 added, 0 changed, 0 destroyed.
   
   Outputs:
   vpc_id = vpc-0286d30b5555c6c74

2. Create application

   cd tf-app
   terraform plan
   terraform apply

   This will create a set of private instances. After creating infrastructure, you could see IP addresses for private instances:

   Apply complete! Resources: 12 added, 0 changed, 0 destroyed.
   
   Outputs:
   private_instance_ip = [
   "10.1.0.15",
   "10.1.0.51",
   "10.1.0.4",
   ]

3. Create metadata REST API

   cd tf-api
   terraform plan
   terraform apply

   This will create a Lambda function and API Gateway. After creating infrastructure, you could see public instance DNS and IP address:

   Apply complete! Resources: 15 added, 0 changed, 0 destroyed.
   
   Outputs:
   get_instances_url = https://npgzno9b99.execute-api.eu-north-1.amazonaws.com/test/instances
   rest_api_id = npgzno9b99

4. Get private instances metadata

   curl -X GET "https://npgzno9b99.execute-api.eu-north-1.amazonaws.com/test/instances" | jq .

5. Don't forget to destroy your infrastructure

   cd tf-api
   terraform destroy
   
   cd tf-app
   terraform destroy
   
   cd tf-vpc
   terraform destroy