Provision a Microsoft AKS (Azure Kubernetes Service) Kubernetes Cluster

Overview

This guide will show you how to quickly setup an AKS cluster on Microsoft Azure. When completed, you will have a fully functional Kubernetes cluster ready to deploy FusionAuth as well as a supporting Azure Database for PostgresSQL. The following method uses the default settings when provisioning an AKS cluster with the required resources and services. It is recommended that you consult the Azure Kubernetes Service docs for details on how to customize the configuration for your use case.

Requirements

A Microsoft Azure account and active subscription with sufficient permissions to create resources.
az - Azure command Line tool used to manage resources on Azure. For installation instructions, see How to install the Azure CLI.
kubectl - Command line tool that interacts with the Kubernetes API server and is useful for managing Kubernetes clusters. Before proceeding, follow the installation documentation that corresponds to your platform found here. This guide will be using version 1.22

Architecture

The resulting architecture for this guide centers around creating an AKS cluster. By default, AKS creates a virtual network hosted in the Azure cloud; the worker nodes will connect to this network. You will create a PostgreSQL database and Elasticsearch cluster that will reside within the same virtual network.

The following reference architecture shows an example application deployed in AKS.

Create an AKS cluster

Create a Resource Group

Before you create the cluster, you need to first create a Resource Group, a logical grouping of Azure resources. A resource group location is where resources will run by default when a region is not provided on creation.

Create a new resource group

az group create --name fusionauthResourceGroup --location westus

JSON output of the resource group creation command

{
  "id": "/subscriptions/2683a458-c361-4b5e-87d9-a4e5237d5b91/resourceGroups/fusionauthResourceGroup",
  "location": "westus",
  "managedBy": null,
  "name": "fusionauthResourceGroup",
  "properties": {
    "provisioningState": "Succeeded"
  },
  "tags": null,
  "type": "Microsoft.Resources/resourceGroups"
}

Create the cluster

Create a new AKS cluster

az aks create \
  --resource-group fusionauthResourceGroup \
  --name fusionauthCluster \
  --node-count 1 \
  --enable-addons monitoring \
  --generate-ssh-keys

Update Kubernetes Configuration

The following retrieves credentials for the newly created cluster and then configures your ~/.kube/config file so that you can use kubectl to connect to this cluster.

Get access credentials and update Kubeconfig

az aks get-credentials \
  --resource-group fusionauthResourceGroup \
  --name fusionauthCluster

Verify Cluster Information

Execute the list command to see AKS clusters that have been configured.

Get list of AKS clusters

az aks list

You now have a fully functional provisioned AKS cluster. For good measure, view the nodes that have been created. Use kubectl to make requests to the Kubernetes API Server.

Get list of nodes running on the cluster

kubectl get nodes -o wide

NAME                                STATUS   ROLES   AGE     VERSION   INTERNAL-IP   EXTERNAL-IP   OS-IMAGE             KERNEL-VERSION     CONTAINER-RUNTIME
aks-nodepool1-13281124-vmss000000   Ready    agent   8m42s   v1.20.9   10.240.0.4    <none>        Ubuntu 18.04.6 LTS   5.4.0-1059-azure   containerd://1.4.9+azure

Great! You have a node in a READY status. This means that the node is healthy and ready to accept pods.

Create a Database

For this setup, you will create a PostgreSQL database. Such a database is required for FusionAuth. Replace fusionauth-db-<my-organization> with the desired database name.

Azure database names are globally unique and you may encounter the error, "Specified server name is already used". Consider appending your own unique identifier such as an organization name in this example.

Create a PostgreSQL flexible server

az postgres flexible-server create \
  --resource-group fusionauthResourceGroup \
  --name fusionauth-db-<my-organization> \
  --location westus \
  --admin-user postgres \
  --admin-password changeMeToSomethingSecure \
  --version 12 \
  --public-access 0.0.0.0

More on these arguments:

resource-group - The name of the resource group where the cluster will be created.
name - The name of the database.
location - The location.
admin-user - The database admin user.
admin-password - The database admin user password.
version - The version of PostgreSQL to install.
public-access - Allows public access in the firewall rules. The 0.0.0.0 parameter allows access to this database from any resource deployed in Azure.

For more information on the create command, see az postgres flexible-server create documentation.

Upon successful database creation, you will receive a JSON object that contains important information about your new database.

JSON output from a successful database creation

{
  "connectionString": "postgresql://postgres:<your-password>@fusionauth-db-example.postgres.database.azure.com/postgres?sslmode=require",
  "databaseName": "flexibleserverdb",
  "firewallName": "AllowAllAzureServicesAndResourcesWithinAzureIps_2021-10-10_23-34-29",
  "host": "fusionauth-db-example.postgres.database.azure.com",
  "id": "/subscriptions/2683a458-c361-4b5e-87d9-a4e5237d5b91/resourceGroups/fusionauthResourceGroup/providers/Microsoft.DBforPostgreSQL/flexibleServers/fusionauth-db-example",
  "location": "West US",
  "password": "your-password",
  "resourceGroup": "fusionauthResourceGroup",
  "skuname": "Standard_D2s_v3",
  "username": "postgres",
  "version": "12"
}

Take note of the database username, password and hostname, as those will be needed to configure FusionAuth. If you need to retrieve this information later, you can use the following command to get a list:

List available flexible servers

az postgres flexible-server list

Deploy Elasticsearch using Elastic Cloud

Azure offers its Elasticsearch Service through Elastic Cloud. This section will guide you through setting up your account and deploying an Elasticsearch cluster.

From the Azure Portal home screen, enter a search for "Elasticsearch" and click on the Elasticsearch (Elastic Cloud) service.

Click on the Create Elasticsearch (Elastic Cloud) button.

Create an Elastic Resource by selecting the resource group you created in the first section of this guide and a name for the resource. Click on Review + Create after providing the required fields.

Review your selections and press the Create button when ready.

Your deployment will now be in-progress as indicated on the next screen. This may take a few minutes to complete.

When the deployment is complete, click on Go to resource group and then click on the Elasticsearch resource that you just created.

Click on the Manage changes in Elastic Cloud link.

You will be directed to your Elastic Cloud dashboard and will see your new deployment listed.

Click on the name of your deployment to manage it. On the next page, you have access to all of the necessary endpoint information you will need to connect to your deployment. Under Applications, click on the Copy endpoint link next to Elasticsearch to copy the URL to your clipboard. You will need to save this URL for use when deploying FusionAuth to your AKS cluster. Next, click on the Security link seen on the left navigation panel.

Click on the Reset Password button to set your administrative credentials for your cluster.

You now have your Elasticsearch cluster deployed and the required credentials to connect to it.

Next Steps

You now are running all the necessary infrastructure to deploy a containerized application to AKS.