Manipulate a file before provisioning in terraform

Question

So I have created a terraform script that does the following:

1. Spins up an EC2 instance
2. Copies over some files
3. Run some remote commands to install stuff from repos
4. Creates an elasticsearch service domain

Now I need to configure the ec2 instance with the endpoint I get back from elasticsearch domain, so the application are using the right endpoint (currently it has some default value).

How can I pass the endpoint value into the file and then copy it over to the ec2 instance. What would be the recommended approach?

Thanks in advance.

Answer 1

Terraform will derive the order automatically, when you refer to the output of a certain resource. You can use the file provisioner to create files on the EC2 instance.