Azure Basic PaaS Based Web Application

The Underlined architecture and its references are taken from Azure Architecture Center. The microsoft site has all content and services details and deployment details outlined are available in ARM-template (json format). This article deploys the same architecture using hashicorp language (HCL) terraform. The code build is enterprise ready code in modularized structure.

By Changing the values in terraform.tfvars files you can deploy this architecture in N-number of environments you have in your organization.

Summary

The architecture shows proven practices for a web application that uses Azure App Service and Azure SQL Database. The architecture has other components like Resource groups, App Service Plan & App, Deployment Slots, IP-Address, Azure DNS, Azure SQL Database, Logical Server, Azure Storage, Azure Active Directory for more details on the each resources please click on this link

Reference Architecture of Basic Web Application

Information

1. Module Structure

• README.md
• main.tf
• variables.tf
• outputs.tf

$ tree minimal-module/
.
├── README.md
├── main.tf
├── variables.tf
├── outputs.tf

Where each file details are outlined as;

• LICENSE will contain the license under which the module is distributed.
• readme.md will contain documentation describing how to use the module, in markdown format.
• main.tf will contain the main set of configuration for the module.
• variables.tf will contain the variable definitions for the module.
• outputs.tf Module outputs are made available to the configuration using the module, so they are often used to pass information about the parts of the infrastructure defined in the module to other parts of current configuration.

2. Module Naming Convention

Terraform	Cloud-Provider	Function	Module Full-Name
terraform	azure	dns	tf-az-dns
terraform	azure	storage	tf-az-strg
terraform	azure	app service plan	tf-az-web
terraform	azure	app service web app	tf-az-web
terraform	azure	sql server	tf-az-db
terraform	azure	sql databases	tf-az-db

3. Pre-requisites Executed

• Resource group in azure account is created manually.
• Choice of region for deployment of azure resources is "Central India"

4. Step By Step Terraform Code Creation Process

1. Define terraform version and azure provider in main.tf file
2. Define resource groups in main.tf file
3. Create files and update code in module folder named tf-az-dns
4. Define dns code in main.tf, variables.tf & terraform.tfvars file.
5. Create files and update code in module folder named tf-az-strg
6. Define dns code in main.tf, variables.tf & terraform.tfvars file.
7. Create files and update code in module folder named tf-az-db
8. Define azure sql server and database code in main.tf, variables.tf & terraform.tfvars file.
9. Create files and update code in module folder named tf-az-web
10. Define azure app service plan and web app service code in main.tf, variables.tf & terraform.tfvars file.

5. Reference Details

Parameter	URL	Terraformed Status
Azure Provider	link	Complete
Azure DNS	link	Complete
Azure Web App	link	Complete
Azure Storage	link	Complete
Azure SQL Database	link	Complete