This blog is in two parts. This first part explains what is needed to start with Terraform, the second part is to go one step further but still targets beginners.
Table of content
Terraform bare minimum
Terraform, what is it ?
- Terraform allows to manage infrastructure thanks to the configuration file known as infrastructure as Code (IaC). It allows to create reproducible infrastructure.
- Terraform determines what has changed and creates incremental execution plans that respect dependencies. It is idempotent.
What do I need to provision something with Terraform ?
- terraform.exe file
- One configuration file
How do I know what to create ?
Most of the time you need the documentation of the provider you want to use. The documentation often respect the same structure and it’s easy to browse. These are the main providers that I use NSX-T/ACI/AWS
The configuration is made of 3 blocks
| Block | Description |
|---|---|
| Terraform | What provider to use |
| Provider | Where to push the configuration |
| Resources | What to create |
terraform provider{
required_provider{
aws = {
source = "hashicorp/aws"
version = "3.55.0"
}
}
}
provider "aws" {
region = "us-east-2"
access_-_key = "**********"
secret_key = "**********"
}
resource "aws_s3_bucket" "netmemo_bucket" {
bucket = "netmemo_bucket"
}
You need 2 commands to push your first configuration
When the first initialization has been done, you will only need the apply command for the next infrastructure modifications.
terraform init=> Download and configure the providerterraform apply=> It tells you what it will do then push the configuration
Proxy white listing
In enterprise, don’t forget to whitelist URLs. Below is an example for AWS.
- To download the providers / backend init
- To authenticate to the providers
- To push the configuration
DEMO TIME
