iac-deploy-tf-ansible

Infrastructure as Code examples with Terraform and Ansible for AWS.

Table of contents:

• Persisting Terraform State in S3 Back End
  • Create S3 bucket
  • Init the backend
• Using variables and providers
• Deploying VPCs, Internet GWs, and Subnets
• Deploying Multi-Region VPC Peering
• Deploying Security groups
• Using Data Source (SSM Parameter Store) to Fetch AMI IDs
• Deploying Key Pairs for App Nodes
• Create EC2 instances
• Destroy Terraform objects

Persisting Terraform State in S3 Back End

Example of how save the Terraform state file in S3 bucket. Changes on the backend can be found on the backend.tf file

Create S3 bucket

First we need to create a S3 bucket file:

aws s3api create-bucket --bucket <BUCKET_NAME>

Init the backend

Then we need to initialize the backend with the following command:

terraform init

Using variables and providers

Example of how to use variables and providers in Terraform can be found in: variables.tf and providers.tf

Deploying VPCs, Internet GWs, and Subnets

Example of how to deploy in Terraform AWS VPCs, Internet GWs, and Subnets can be found in: networks.tf

Deploying Multi-Region VPC Peering

Example of how to deploy in Terraform Multi-Region VPC peerings can be found in: networks.tf

Deploying Security groups

Example of how to deploy Security Groups in Terraform can be found in security_groups.tf

Using Data Source (SSM Parameter Store) to Fetch AMI IDs

Example of how to use Data source to fetch AMI ids can be found in instances.tf

Deploying Key Pairs for App Nodes

To create the authentication key pairs for SSH use the following command:

ssh-keygen -t rsa

A public and a private key will be created in your ~/.ssh directory

The example of how to atach the key pairs in the EC2 instances can be found in: instances.tf

Create EC2 instances

Example of how to create the EC2 instances can be found in: instances.tf

A example of how to get the ips of the created instances can be found: outputs.tf

Configuring Terraform Provisioners for Config Management via Ansible

Example of how to run Terraform provisioners with Ansible can be found on the instances.tf file.

Files used by Ansible:

• inventory_aws/tf_aws_ec2.yml
• ansible_templates/jenkins-master-sample.yml
• ansible_templates/jenkins-worker-sample.yml
• ansible.cfg

Destroy Terraform objects

If you are testing and want a destroy all remote objects managed by this Terraform configuration use:

terraform destroy