resilientazureapi

A sample repo demonstrating a http api deployment on azure over multi-az

Getting Started

Prerequisites

• Terraform
• Azure CLI
• .Net Core SDK
• [Azure Subscription]
• [2 Resource groups - 1 For TF remote state and 1 for deploying the api]
• [Log Analytics Workspace]
• Azurite

Installation

git clone https://github.com/haripraghash/resilientazureapi.git
cd resilientazureapi/infrastructure

Quickstart

There are different ways to authenticate with the Azure provider via Terraform. This example uses a Service Principal with a Client Secret to authenticate.

az login
az account set -s <subscription_id>
az ad sp create-for-rbac --role="Contributor" --scopes="/subscriptions/<your-subscription-id>"

export ARM_SUBSCRIPTION_ID=<subscription-id>
export ARM_CLIENT_ID=<app-id>
export ARM_CLIENT_SECRET=<password>
export ARM_TENANT_ID=<tenant-id>

terraform init
terraform validate
terraform plan -var-file="dev.tfvars"
terraform apply -var-file="dev.tfvars"

TF with remote state on Azure

terraform init \
      -backend-config="storage_account_name=<remote storage acc name>" \
      -backend-config="container_name=<remote container name>" \
      -backend-config="key=<BLOB FILE NAME>" \
      -backend-config="access_key=<storage access key>"

Github Actions config

• One environment named dev
• Set up environment secret variables named ARM_CLIENT_ID, ARM_CLIENT_SECRET,ARM_TENANT_ID,ARM_SUBSCRIPTION_ID
• Setup a secret named AZURE_RBAC_CREDENTIALS to enabled github to perform deployments on the resource group - https://github.com/marketplace/actions/azure-functions-action#using-azure-service-principal-for-rbac-as-deployment-credential

Testing after deployment

The API sits behind an Azure Front Door. AFD is not deployed to save costs. AFD only allows requests those are compliant with RFC standards.

curl -d "" -X POST https://aa-eun-dev-availableapi-afd.azurefd.net/api/CreateTimestamp

API Documentation

API documention is exposed as swagger at https://aa-eun-dev-availableapi-afd.azurefd.net/api/swagger/ui