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Microsoft Announces automatic OS upgrades for Azure VM scale sets

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Microsoft Announces automatic OS upgrades for Azure VM scale sets
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Infrastructure scale and complexity When Azure virtual machine scale sets were introduced, we made it easy to deploy and manage cloud infrastructure at very large scale. We are continually looking for ways to lower the overall cost of managing cloud infrastructure. One area of cost that increases with scale is maintaining each virtual machine patched to the latest OS version, while keeping your applications running. This means finding ways to smoothly roll out an upgrade, one batch of VMs at a time. Many OS providers create new patched versions of their VM images at a monthly cadence, or more frequently for critical security fixes, but checking for, and manually rolling out these upgrades adds to cloud infrastructure management cost.

Announcing new automation features for scale sets Today we are announcing a new set of automation features to simplify OS image upgrades for scale sets, allowing you to adopt a set-it-and-forget-it approach to OS lifecycle maintenance.

Automatic OS image upgrade preview Now in preview, the automatic OS image upgrade feature for Azure scale sets will automatically upgrade all VMs in your scale set to the latest version. Once configured, the latest OS image published by image publishers will automatically be applied to the scale set without user intervention.

To minimize application downtime, upgrades take place in batches of machines, with no more than 20% of the scale set upgrading at any time. You also have the option to integrate an Azure Load Balancer application health probe. This is highly recommended to incorporate an application heartbeat and validate upgrade success for each batch in the upgrade process.

To maintain consistency and adherence to the latest OS versions across your applications, it’s also possible (and recommended) to configure an Azure Resource Manager policy, which enforces automatic image upgrade for all the scale sets in your subscription.

Read the entire article here, Announcing automatic OS upgrades for Azure VM scale sets | Blog

Via the fine folks at Microsoft.

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