Terraform AWS Modules

it creates fully operational AWS VPC infrastructure

• subnets
• routeing tables
• igw

it creates EC2 and RDS instances

• security key
• security group
• subnet group

It creates the Elastic Load Balancer and add the EC2 instance(s) It adds Route53 entry for this site and add the ELB alias to it.

Terraform AWS Modules Tasks:

• Create 1 x VPC with 4 x VPC subnets(2 x public and 2 x private) in differrent AZ zones inside the AWS region
• Create the AWS key pair with the provided public key
• Create 1 x security group for each(SSH,Webservers,RDS and ELB)
• Provision 2 x EC2 instances in 2 different public AZ
• Provision 1 x RDS instance in private subnets
• Launch and configure public facing VPC ELB (cross_az_load_balancing) and attach VPC subnets
• Register EC2 instances on ELB
• Take the ELB dnsname and register/create dns entry in Route53

Basic Terraform Help

Requirements:

• Terraform
• Ansible
• AWS admin access

Development Tools Used:

ansible 2.9.6
  config file = /etc/ansible/ansible.cfg
  configured module search path = ['/home/jbonilla/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python3/dist-packages/ansible
  executable location = /usr/bin/ansible
  python version = 3.8.2 (default, Mar 13 2020, 10:14:16) [GCC 9.3.0]

terraform version
Terraform v0.12.28
+ provider.aws v2.68.0

Before using the terraform, we need to export AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY as environment variables:

export AWS_ACCESS_KEY_ID="xxxxxxxxxxxxxxxx"
export AWS_SECRET_ACCESS_KEY="yyyyyyyyyyyyyyyyyyyy"

To Generate and show an execution plan (dry run):

terraform plan

To Builds or makes actual changes in infrastructure:

terraform apply

To inspect Terraform state or plan:

terraform show

To destroy Terraform-managed infrastructure:

terraform destroy

Note: Terraform stores the state of the managed infrastructure from the last time Terraform was run. Terraform uses the state to create plans and make changes to the infrastructure.

Ansible Role after Terraform Provisioning:

Once the Terraform will create all the resources over AWS, you can use the Ansible to install the wordpress over the EC2 instance(s)

To use the provided Role:

ANSIBLE_HOST_KEY_CHECKING=False ansible-playbook -u ubuntu --key-file ./secrets/key.pem -i '${self.public_ip},' site.yml