Instructions for AWS Lampstack

Note: The S3 bucket depicted isn't created, as is not necessary for the LAMP config.

This will stand up an autoscaling group with 2 servers minimum. These servers will have Apache, PHP installed on them, with EBS storage. This will will also stand up MySQL instance with read-replica in a separate AZ.

There is a script that will be installed named calldb.php that will faciliate and show connection to MySQL.

Requirements

• Terraform 0.15.0 was used for this recipe. I highly recommend installing tfswitch via brew (or your package manager of choice).
• OpenSSL utility (should be a part of Mac/Linux).
• Curl utility (should be a part of Mac/Linux).
• AWS CLI installed NOTE: Instructions work fine for Macos. Adjust things to Windows, if you need it.

Preliminaries

• Generate new key for login:

ssh-keygen -t rsa -f ./sshkey

• Login to AWS CLI

rm  -rf ~/.aws/credentials
aws configure

• Get the latest AMI image ID that we'll use:

aws ssm get-parameters --names /aws/service/ami-amazon-linux-latest/amzn2-ami-hvm-x86_64-ebs --region $TF_VAR_REGION | jq -r '.Parameters[].Value'

• Generate random string for use in infra for Globally unique IDs: openssl rand -hex 6 Note, copy part of the string starting with a letter. Use this in the next step.

• Create .env file

#!/bin/bash
export TF_VAR_REGION="us-east-1"
export TF_VAR_BUCKET_NAME="tfstate-<your random string>-lamp" 
export TF_VAR_BUCKET_KEY="tfstate"
export TF_VAR_PROJECT="Lamp_Example"
export TF_VAR_AMI_ID="ami-01fbb4d2e4383c997"
export TF_VAR_DB_USER="foo" #whatever here
export TF_VAR_DB_PASSWORD="foobarbaz" #whatever here

• Source this in a terminal window with source .env
• Create S3 bucket for TF State.

 aws s3api  create-bucket --bucket $TF_VAR_BUCKET_NAME --region $TF_VAR_REGION

Terraform work

• Init the Terraform backend state.

terraform init --backend-config "bucket=$TF_VAR_BUCKET_NAME" --backend-config "key=$TF_VAR_BUCKET_KEY" --backend-config "region=$TF_VAR_REGION"

• Plan:

terraform plan

• Execute.

terraform apply -auto-approve

Test it

• Note: wait about 5 minutes, due to DNS propagation

• Execute the following over and over to see the 2 EC2's answering:

curl $(eval echo `terraform output elb_dns_name`)/index.php

• Execute the following over and over to see the database usage of RDS

curl $(eval echo `terraform output elb_dns_name`)/calldb.php

Destroy things

• To remove everything: terraform destroy -auto-approve