frank-bee / terraform-training

terraform-training Lab

Training slides see https://pages.github.boschdevcloud.com/GS-PJ-TOP98-AI-KNOW/terraform-beginner-workshop/

Preparation

• login to the AWS account (platform) https://myapplications.microsoft.com/
• Start your cloud9 IDE, check AWS auth. settings
• clone the training repo
  git clone https://github.com/frank-bee/terraform-training.git

Lab 1

1.1 Get started

• Open this Lab docu in seperate browser window
• Open the slides in seperate browser window
• Use the Cloud9 terminal to go to the root of the training repo, where you find the main.tf
• Run terraform init
  Observe the output
• Run terraform plan
  Observe the output

1.2 Variable usage

• Try several ways of setting the root variables
• Use a variable to set the attribute subnet_id
• Introduce a variable prefix and use it to prefix the ec2 tag "Name" (with e.g. your name)

1.3 Format you code

• Run terraform fmt

(optional) 1.4

• Find out about the EC2 / instance attribute which is resposible to enable monitoring of the EC2 (google)
• Enable monitoring and observe the plan.

Lab 2

2.1 Apply, Change, Apply

• Apply the infrastructure with a terraform apply
• Check the result in the AWS console (region Ireland!)
• Change something in the code, e.g. enabling /disabling ec2 monitoring (attribute monitoring)
  What do you expect running terraform plan? Do it
• Apply the changes with a terraform apply --auto-approve

2.2 Destroy the infrastructure

• Destroy the infrastructure with a terraform destroy
• What do you expect running terraform plan? Do it
• Recreate the infrastructure

2.3 Add an output

• Add a terraform output for the URL of your wordpress site to your stack (typically in a file output.tf)
  Hint: Make use of the attribute public_dns of the instance
• Apply the change
• Try the command terraform output
• Can you see the wordpress site in your browser? Quiz: why not?

2.4 Make use of a public module

• Create a SG with this module
  Set the following attributes: name, description, vpc_id, cidr_blocks.
  Use the internet CIDR block 0.0.0.0/0 - or even better your own IP / Bosch IP range
• Reference a suitable attribute in your aws_network_interface:

resource "aws_network_interface" "wpress" {
  subnet_id   = "subnet-0f59ce43a926f6179"

  security_groups = ...

• Apply the changes to your stack
• Does your wordpress appear in the browser now?

2.5 (optional) Try terraform graph

• Run terraform graph
• Copy the output to https://dreampuf.github.io/GraphvizOnline/
• Have a look at the dependencies

2.6 (optional) Make use of a data source

• Refactor the "hardcoded" subnet_id
• Use https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/subnet
  Hint: Filter

Lab 3

• Create a branch in in our infrastrastructure repo
• Instantiate the terraform-aws-dummy module in the platform dev stack
  Hint: See how to reference the latest module version here
• Open a pull request and observe the terraform plan
• Add Frank as reviewer