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Tutorial: Deploy SQL Server Big Data Clusters in AD mode on Azure Kubernetes Services (AKS)

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This article explains how to deploy a SQL Server big data cluster in the Active Directory authentication mode with a reference architecture. The reference architecture extends your on-premises Active Directory domain Service (AD DS) to Azure. You can deploy it from Azure Architecture Center with Azure building blocks.

Important

The Microsoft SQL Server 2019 Big Data Clusters add-on will be retired. Support for SQL Server 2019 Big Data Clusters will end on February 28, 2025. All existing users of SQL Server 2019 with Software Assurance will be fully supported on the platform and the software will continue to be maintained through SQL Server cumulative updates until that time. For more information, see the announcement blog post and Big data options on the Microsoft SQL Server platform.

Prerequisites

Before deploying a SQL Server big data cluster, you need to:

Create AKS subnet

  1. Set environment variables

    export REGION_NAME=< your Azure Region >
export RESOURCE_GROUP=<your resource group >
export SUBNET_NAME=aks-subnet
export VNet_NAME= adds-vnet
export AKS_NAME= <your aks cluster name>

  2. Create the AKS subnet

    SUBNET_ID=$(az network vnet subnet show \
 --resource-group $RESOURCE_GROUP \
 --vnet-name $VNet_NAME \
 --name $SUBNET_NAME \
 --query id -o tsv)

The following screenshot shows how we plan the subnets resides in the VNet in the architecture.

Diagram of the AKS cluster with AD and SQL Server Big Data Cluster.

Create an AKS private cluster

You can use the following command to deploy AKS private cluster. If you do not require a private cluster, remove --enable-private-cluster parameter in the command. For information about any other requirements, see how to deploy an Azure Kubernetes Cluster (AKS).

az aks create \
    --resource-group $RESOURCE_GROUP \
    --name $AKS_NAME \
    --load-balancer-sku standard \
    --enable-private-cluster \
    --network-plugin azure \
    --vnet-subnet-id $SUBNET_ID \
    --docker-bridge-address 172.17.0.1/16 \
    --dns-service-ip 10.3.0.10 \
    --service-cidr 10.3.0.0/24 \
    --node-vm-size Standard_D13_v2 \
    --node-count 2 \
    --generate-ssh-keys

After deploying an AKS cluster, connect to the AKS cluster.

Verify reverse DNS entry for domain controller

Before starting the SQL Server Big Data Clusters deployment in AD mode in AKS cluster, verify that the domain controller itself has both A record and PTR record (reverse DNS entry), registered in the DNS server.

To verify this setting, run nslookup command or run the PowerShell script to confirm if you have reverse DNS entry (PTR record) configured.

Create big data cluster deployment profile

The following command creates a deployment profile:

azdata bdc config init --source kubeadm-prod  --target bdc-ad-aks

The following commands are utilized to set parameters for a deployment profile.

control.json

azdata bdc config replace -p bdc-ad-aks/control.json -j "$.spec.storage.data.className=default"
azdata bdc config replace -p bdc-ad-aks/control.json -j "$.spec.storage.logs.className=default"
azdata bdc config replace -p bdc-ad-aks/control.json -j "$.spec.endpoints[0].serviceType=NodePort"
azdata bdc config replace -p bdc-ad-aks/control.json -j "$.spec.endpoints[1].serviceType=NodePort"
azdata bdc config replace -p bdc-ad-aks/control.json -j "$.spec.endpoints[0].dnsName=controller.contoso.com"
azdata bdc config replace -p bdc-ad-aks/control.json -j "$.spec.endpoints[1].dnsName=proxys.contoso.com"

# security settings 
azdata bdc config replace -p bdc-ad-aks/control.json -j "$.security.activeDirectory.ouDistinguishedName=OU\=bdc\,DC\=contoso\,DC\=com"
azdata bdc config replace -p bdc-ad-aks/control.json -j "$.security.activeDirectory.dnsIpAddresses=[\"192.168.0.4\"]"
azdata bdc config replace -p bdc-ad-aks/control.json -j "$.security.activeDirectory.domainControllerFullyQualifiedDns=[\"ad1.contoso.com\"]"
azdata bdc config replace -p bdc-ad-aks/control.json -j "$.security.activeDirectory.domainDnsName=contoso.com"
azdata bdc config replace -p bdc-ad-aks/control.json -j "$.security.activeDirectory.clusterAdmins=[\"bdcadminsgroup\"]"
azdata bdc config replace -p bdc-ad-aks/control.json -j "$.security.activeDirectory.clusterUsers=[\"bdcusersgroup\"]"

bdc.json

azdata bdc config replace -p bdc-ad-aks/bdc.json -j "$.spec.resources.master.spec.endpoints[0].dnsName=master.contoso.com"
azdata bdc config replace -p bdc-ad-aks/bdc.json -j "$.spec.resources.master.spec.endpoints[0].serviceType=NodePort"
azdata bdc config replace -p bdc-ad-aks/bdc.json -j "$.spec.resources.master.spec.endpoints[1].dnsName=mastersec.contoso.com"
azdata bdc config replace -p bdc-ad-aks/bdc.json -j "$.spec.resources.master.spec.endpoints[1].serviceType=NodePort"
azdata bdc config replace -p bdc-ad-aks/bdc.json -j "$.spec.resources.gateway.spec.endpoints[0].dnsName=gateway.contoso.com"
azdata bdc config replace -p bdc-ad-aks/bdc.json -j "$.spec.resources.gateway.spec.endpoints[0].serviceType=NodePort"
azdata bdc config replace -p bdc-ad-aks/bdc.json -j "$.spec.resources.appproxy.spec.endpoints[0].dnsName=approxy.contoso.com"
azdata bdc config replace -p bdc-ad-aks/bdc.json -j "$.spec.resources.appproxy.spec.endpoints[0].serviceType=NodePort"

Initiate deployment

The following command initiates a big data cluster deployment:

azdata bdc create --config-profile bdc-ad-aks --accept-eula yes

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