Scenario: Lets create the following architecture in AWS
- The first version of the architecture to be created using terraform looks as shown below
- So before we start working on terraform, we should know how to manually create it.
- Now lets try to acheive the same from terraform
- Create a new folder and in that folder create a terraform file main.tf
- In todays example lets not hard code the access_key and secret_key
- So lets create Environmental Variables
- AWS_ACCESS_KEY_ID
- AWS_SECRET_ACCESS_KEY
- To set environmental variables in Linux
export AWS_ACCESS_KEY_ID="anaccesskey"
export AWS_SECRET_ACCESS_KEY="asecretkey"
- To set environmental variables in windows powershell
$env:AWS_ACCESS_KEY_ID="youraccesskey"
$env:AWS_SECRET_ACCESS_KEY="your secret key"
- Now perform init
terraform init
- Validate the template
terraform validate .
- Now lets create the resources by executing
terraform apply .
- Now lets verify the vpc manually in the aws console
- Now lets just apply
terraform apply .again
- Terraform will apply only when there is need to create resources, if the resources are already created and have the same values as you mentioned, terraform will not do anything.
- Refer Here for the changes
- Now lets make small change in aws vpc to enable dns support Refer Here for the changes
- Now lets view the contents of the folder, some new files got generated during apply
- Lets understand the importance the files generated in our next session.
