Leave a Comment / Articles, Azure / By SQLYARD
Microsoft Azure Arc extends Azure management and governance beyond the cloud, allowing organizations to bring Azure’s control plane to their on-premises servers, edge devices, VMs, Kubernetes clusters, and data services. In this guide, we’ll focus on the data platform layer—specifically Azure Arc–enabled SQL Server and Azure Arc–enabled SQL Managed Instance (MI)—and walk through how DBAs and architects can integrate them into hybrid or multi-cloud environments.
What Is Azure Arc?
Azure Arc is a cloud-agnostic management and governance platform that lets you project non-Azure resources into Azure Resource Manager (ARM). Once connected, you can manage, monitor, and secure them using the same tools as native Azure services.
Arc bridges environments across:
- On-premises servers (Windows/Linux)
- Edge devices and branch offices
- Multi-cloud VMs (AWS EC2, GCP Compute, VMware, etc.)
- Kubernetes clusters (AKS, EKS, GKE, OpenShift)
- Data workloads like SQL Server, PostgreSQL, and MongoDB
This unified view gives IT teams operational consistency across infrastructure—policies, updates, monitoring, and billing all flow through a single control plane. Microsoft Learn – Azure Arc overview
Why Azure Arc Matters for DBAs and Data Engineers
Traditionally, SQL Server instances running on-premises or other clouds were isolated from Azure’s management capabilities. With Arc, you can bring them under the same governance model and gain:
- Inventory and tagging for all SQL Servers across environments
- Policy enforcement using Azure Policy (for instance, encryption at rest or audit settings)
- Security baselines and vulnerability assessments via Defender for SQL
- Automated patch tracking and version reporting
- Centralized monitoring through Azure Monitor and Log Analytics
- Azure billing and licensing benefits (e.g., pay-as-you-go for Arc SQL)
Arc creates a bridge between your SQL ecosystem and Azure’s governance, offering insight without moving data.
Azure Arc–Enabled SQL Server
Arc-enabled SQL Server connects on-prem or IaaS SQL instances to Azure through an Azure Connected Machine agent. Once registered, they become first-class Azure resources under your subscription.
Key Capabilities
- Asset inventory: Track SQL instances, editions, and versions across environments.
- Defender for SQL integration: Automatically surface vulnerabilities, missing patches, or misconfigurations.
- Policy-based management: Enforce configuration standards—like requiring TDE or auditing—through Azure Policy.
- Usage-based billing: Convert existing SQL Servers to pay-as-you-go licensing, billed monthly through Azure.
- Centralized insights: Send telemetry to Azure Monitor for performance dashboards and alerting.
Arc-enabled SQL Server uses the Azure extension for SQL Server (sqlServerExtension) installed via the Connected Machine agent. Microsoft Learn – Arc-enabled SQL Server
Azure Arc–Enabled SQL Managed Instance (Arc SQL MI)
Arc SQL Managed Instance brings the PaaS capabilities of Azure SQL Managed Instance into your on-premises or Kubernetes environment. It’s built on Azure Arc Data Services, allowing organizations to deploy managed databases close to their data.
Benefits for Hybrid Data Scenarios
- Full SQL compatibility with on-prem latency and security controls.
- Self-service provisioning on Kubernetes or edge clusters.
- Offline management mode for disconnected or secure networks.
- Azure portal integration for monitoring, backups, and patching.
- Elastic scalability using Kubernetes resources instead of traditional VMs.
Example: A financial institution can run Arc SQL MI on AKS in its private datacenter to comply with data sovereignty rules while maintaining Azure-style management and updates. Microsoft Learn – Azure Arc SQL MI
Security and Compliance Through Azure Policy
Arc integrates Azure Policy and Defender for SQL, ensuring compliance across mixed environments. You can define a single policy—for example, “Ensure Transparent Data Encryption (TDE) is enabled”—and apply it across all Arc-enabled SQL Servers.
Azure Defender then continuously scans configurations and reports on vulnerabilities, missing patches, and compliance drift. All results are visible in Azure Security Center dashboards. Microsoft Learn – Defender for SQL
Monitoring and Automation
Arc-enabled data services plug directly into Azure Monitor, Log Analytics, and Azure Automation.
You can:
- Track CPU, I/O, and wait stats through unified dashboards.
- Configure alert rules via Azure Monitor Metrics.
- Automate patch installation or restart schedules with Update Management Center.
These integrations reduce tool fragmentation—DBAs can manage both Azure and non-Azure SQL Servers from a consistent interface. Microsoft Learn – Monitor Arc-enabled SQL
Workshop: Deploy and Register an Azure Arc–Enabled SQL Server
Objective:
Register a SQL Server instance running on-prem or in a VM to Azure Arc, apply a policy, and view it in the Azure portal.
Step 1: Prerequisites
- Azure subscription and Owner permissions
- SQL Server 2016 SP1 or later
- Windows Server 2016+
- PowerShell 7+ installed
Step 2: Install the Connected Machine Agent
Run as Administrator:
$subscriptionId = "<YourSubscriptionID>"
$resourceGroup = "<ResourceGroup>"
$region = "westus2"
Invoke-WebRequest -Uri https://aka.ms/AzureConnectedMachineAgent -OutFile AzureConnectedMachineAgent.msi
msiexec /i AzureConnectedMachineAgent.msi /l*v installationlog.txt /qn
azcmagent connect --service-principal-id <AppID> `
--service-principal-secret <Secret> `
--tenant-id <TenantID> `
--subscription-id $subscriptionId `
--resource-group $resourceGroup `
--location $regionStep 3: Enable Arc SQL Extension
azcmagent extensions install --name SqlServerExtensionStep 4: Verify in Azure Portal
Navigate to Azure Arc > SQL Servers to see your instance listed.
Step 5: Apply a Policy
In Azure Policy, assign the initiative “SQL security and auditing best practices” to the resource group.
Step 6: Enable Defender for SQL
In the portal:Azure Arc > SQL Servers > Settings > Microsoft Defender for Cloud > Enable
Step 7: Review Insights
Open Azure Monitor and visualize performance metrics or compliance alerts for your Arc SQL Server.
Outcome:
Your SQL Server is now registered under Azure Arc, secured with Defender, and governed by Azure Policy—all without migrating data to Azure.
Real-World Use Cases
- Regulated industries: Run Arc SQL MI on-prem to meet data residency laws while maintaining Azure control.
- Global enterprises: Monitor hundreds of SQL Servers across subsidiaries with centralized patching.
- Modernization strategy: Gradually migrate workloads from Arc SQL Server to native Azure SQL using consistent policies and metrics.
Final Thoughts
Azure Arc unifies hybrid data management—bringing cloud governance, automation, and AI capabilities to on-prem and multi-cloud systems. For DBAs, it bridges the operational gap between traditional servers and modern data services.
Start by registering one SQL Server, then expand gradually. Apply policies, enable Defender, and integrate with Power BI or Sentinel for advanced analytics. Over time, Azure Arc can become the central nervous system of your hybrid data estate.
References
- Azure Arc Overview – Microsoft Learn
- Azure Arc–Enabled SQL Server
- Azure Arc–Enabled SQL Managed Instance
- Defender for SQL on Arc
- Azure Policy for Arc
- Monitoring Arc-Enabled SQL Servers
- Azure Arc Data Services Overview
Discover more from SQLYARD
Subscribe to get the latest posts sent to your email.
