topic (iac): [secure-hybrid-network] update OS and VM SKU to modern Gen2#268
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ckittel
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May 28, 2026
| @description('The count of Windows virtual machines to create.') | ||
| param webServerInstanceCount int = 2 | ||
| param vmSize string = 'Standard_A4_v2' | ||
| param vmSize string = 'Standard_D2s_v3' |
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Do you need to update the listed default in the README now?
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Pull request overview
Modernizes the secure-hybrid-network solution’s nested templates by updating default Windows image SKUs and VM sizes to newer, better-supported options.
Changes:
- Updated default VM size parameters to
Standard_D2s_v3in both ARM JSON and Bicep templates. - Updated Windows Server image SKU variables to Windows Server 2025 Gen2 variants.
- Removed explicit
patchSettingsconfiguration from the mock on-prem VM’s Bicep definition.
Reviewed changes
Copilot reviewed 4 out of 4 changed files in this pull request and generated 5 comments.
| File | Description |
|---|---|
| solutions/secure-hybrid-network/nestedtemplates/mock-onprem-azuredeploy.json | Updates default VM size and Windows image SKU for the mock on-prem VM. |
| solutions/secure-hybrid-network/nestedtemplates/mock-onprem-azuredeploy.bicep | Updates default VM size/image SKU and removes explicit Windows patch settings. |
| solutions/secure-hybrid-network/nestedtemplates/azure-network-azuredeploy.json | Updates default VM size and Windows image SKU used by the VMSS. |
| solutions/secure-hybrid-network/nestedtemplates/azure-network-azuredeploy.bicep | Updates default VM size and Windows image SKU used by the VMSS. |
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| "vmSize": { | ||
| "type": "string", | ||
| "defaultValue": "Standard_DS1_v2" | ||
| "defaultValue": "Standard_D2s_v3" | ||
| }, |
- Replace Standard_A4_v2 (Gen1-only) with Standard_D2s_v3 (Gen2-capable) - VMSS (web tier): 2025-datacenter-core-smalldisk-g2 (Server Core for IIS) - Mock on-prem VM: 2025-datacenter-smalldisk-g2 (full desktop for Bastion RDP) - Smaller disk, faster boot, reduced attack surface on web tier Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Update parameter tables to reflect new Standard_D2s_v3 default. Co-authored-by: GitHub Copilot (Claude Opus 4.6) <noreply@github.com>
Keep AutomaticByPlatform patch assessment and mode settings on the mock on-premises VM for production-like configuration. Co-authored-by: GitHub Copilot (Claude Opus 4.6) <noreply@github.com>
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approved these changes
May 28, 2026
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Why
Windows Server 2016/2022 reached end of mainstream support. Standard_A4_v2 is a legacy SKU with poor price-performance.
What
2025-datacenter-core-smalldisk-g2(Core — no GUI needed)2025-datacenter-smalldisk-g2(full desktop for RDP/browser testing)Test