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CodicaTask

Task

Create a template for AWS and a few extra things to speed up the whole process.

Write with Terraform :

  • VPC (CIDR 10.0.0.0/16) with subnets (2 private and 2 public, CIDR doesn’t matter here)
  • NAT and Internet gateways
  • Application load balancer and target group
  • RDS database db.t3.micro with custom subnet group and EC2 instance t3.micro(latest ubuntu AMI)
  • Security groups, route tables, and other required resources
  • Follow naming conventions from here.
  • Try to keep infra as secure as possible, and do not use any custom modules here.
  • The state should be in a private S3 bucket

Ansible:

  • The simple playbook that will install docker, docker-compose v2, and required dependencies
  • Make it work with both RHEL and Debian-like operating systems

Docker:

  • Launch this template but instead of using the database defined in compose use your RDS instance

How to run

1 STEP - Download prerequisites

Clone repository to your computer

git clone https://github.com/DanyaCt/CodicaTask

Additionally, you need to download Terraform, AWS CLI, and Ansible. You can use the following links:

Terraform: https://developer.hashicorp.com/terraform/downloads

AWS CLI: https://docs.aws.amazon.com/cli/latest/userguide/getting-started-install.html

Ansible: https://docs.ansible.com/ansible/latest/installation_guide/intro_installation.html

Next, you must log in to your AWS account. Here's a guide for this:

https://docs.aws.amazon.com/cli/latest/reference/configure/

2 STEP - Create key pair and private S3 bucket

Note: Your key pair and S3 bucket must be in the same region as all your other resources (by default 'eu-central-1'; you can change it on lines 4 and 18).

Create a key pair in AWS using the following guide:

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/create-key-pairs.html

Then, install your key in the project folder and enter the name of the key in the code (line 2).

And change the permissions for your key:

chmod 400 <your key>

Next, create a private S3 bucket and enable versioning using the following guide:

https://www.simplified.guide/aws/s3/create-private-bucket

Then, enter your bucket name in the code (line 15)

3 STEP - Run Terraform

Run these commands:

terraform init
terraform apply -auto-approve -parallelism=15

4 STEP - Change compose.yaml file

Go to the compose.yaml file and change "WORDPRESS_DB_HOST" from Terraform output.

It should look something like this:

services:
  wordpress:
    image: wordpress:latest
    ports:
      - 80:80
    restart: always
    environment:
      - WORDPRESS_DB_HOST=terraform-20230304115008252200000004.c7qoidvlik6t.eu-central-1.rds.amazonaws.com:3306
      - WORDPRESS_DB_USER=user
      - WORDPRESS_DB_PASSWORD=password
      - WORDPRESS_DB_NAME=mydb
volumes:
  db_data:

5 STEP - SSH to your instance and run Wordpress container

Run the following command in your terminal:

ssh -i "<your key here with .pem>" ubuntu@<ip of your instance from terraform output>

You will be inside your instance.

Next, create the compose.yaml file:

vi compose.yaml

Copy the text from the previous step and paste it into the compose.yaml file on your instance.

Then, type :wq and press enter.

Finally, run the following command:

sudo docker compose up -d

The Wordpress container has started, and you can check if it works by pasting this URL into your browser:

http://<instance public_ip from Terraform output>

Also, you can access the site with the DNS name from the Terraform output by pasting it into your browser