Learn how to build projects using Terraform.

DevOps for Developers

In this module, you will work from the ground up, starting with what Terraform is and the problems it solves. It will then guide you through the features of Terraform. You will build on your knowledge with the end goal of you being comfortable building projects using Terraform.

Terraform: From Beginner to Master with Examples in AWS

## Terraform data source
A data source in Terraform is used to fetch data from a resource that is not managed by the current Terraform project. This allows it to be used in the current project. You can think of it as a read-only resource that already exists; the object exists, but you want to read specific properties of that object for use in your project.

## Project example
Let's dive into an example:



provider "aws" {
    region = "us-east-2"
}

data "aws_s3_bucket" "bucket" {
    bucket = "kevholditch-already-exists"
}

resource "aws_iam_policy" "my_bucket_policy" {
    name = "my-bucket-policy"

    policy = <<EOF
{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Action": [
                "s3:ListBucket"
            ],
            "Effect": "Allow",
            "Resource": [
                "${data.aws_s3_bucket.bucket.arn}"
            ]
        }
    ]
}
EOF
}


As you can see from the above project, a data source block starts with the word "data". The next word is the type of data source. We are using an `aws_s3_bucket` data source, which is used to lookup an S3 bucket. After the data source type, we give the data source an identifier, in this case `"bucket"`. The identifier is used to reference the data source inside the Terraform project. The data source block is opened with a `{`. You then specify any properties you want Terraform to use to search for the
resource. We are using the complete name of the S3 bucket we are looking for. You then close the
data source block with `}`.

# Terraform data source
A data source in Terraform is used to fetch data from a resource that is not managed by the current Terraform project. This allows it to be used in the current project. You can think of it as a read-only resource that already exists; the object exists, but you want to read specific properties of that object for use in your project.

# Project example
Let's dive into an example:

This lesson will teach you about Terraform data and how it is to used. 

Data Sources in Detail

This lesson will teach you about Terraform data and how it is to used.