This is a set of sample Terraform scripts to deploy (Blue/Green) highly-available web server with php 7.4 support in AWS.
The Web Page is stored in separate GitHub repository The following repository is being cloned to each EC2 instance in Web Fleet during bootstrap.
NOTE: The scripts will create NAT Gateways in each Public Subnet, which are not part of AWS Free-Tier and you need to pay for them on hourly basis. If you plan to stay within AWS Free-Tier you can set free-tier variable to true. However in such case Web Tier will be in Public zone, which is less secure.
The following diagram describes the infrastructure created by the scripts.
The red arrows show traffic from/to Internet. The green arrows show traffic within VPC.
You can adjust the following parameters, stored in vars.tf file:
| Variable | Description |
|---|---|
free_tier |
Stay within AWS Free-Tier and agree to expose Web subnets to public |
region |
AWS Region name |
subnets_count |
Number of subnets you want to create |
ec2_max_count |
Maximal number of EC2 instances in Web Fleet |
cidr_base |
Base part of CIDR block for VPC. Default is 10.10 |
ssh_ips |
CIDR block for SSH-allowed IPs (only to Bastion Host) |
ssh_key |
Name of your SSH key |
open_ports |
Ports opened for Web Application |
project_tags |
Map of common project tags |
Big thanks to Denis Astahov for his Udemy courses and educational YouTube channel