At itnetX, we help customers to implement as well as to operate  Azure Stack. One part of operating Azure Stack is keeping it up-to-date. This means installing Microsoft Azure Stack Updates, hotfixes as well as OEM update packages like drivers and firmware. In this blog post I will cover all the information you need to keep your Azure Stack up-to-date.

Why should you update your Azure Stack

This may sound like a simple question, but a lot of people ask for it. First of all, Microsoft and the hardware vendors are obviously delivering quality fixes and security updates to keep Azure Stack stable and secure. But Microsoft also adds new functionality with their updates packages to keep up with the rapid cloud development on Azure. This is important if you want that your Azure Stack stays consistent with Azure in terms of functionality.

Another important reason to stay current is to stay supported. You are allowed to be behind two major versions of Azure Stack, which means 2-3 months. You basically should update monthly, to make sure that you are secure and stable, however there are reasons why you might have to defer an update. For example, this can happen for some companies, when they are in a freeze period where they are not allowed to do changes in their systems. If you are more than 3 major versions behind, your Azure Stack is considered out of support and will not be supported from Microsoft, until you have the at least required version installed.

You can read more about the Azure Stack servicing policy on the Azure Stack documentation site.

Updates for the Azure Stack Integrated System

As mentioned before, there are basically three types of updates to Azure Stack. The monthly Azure Stack Update Packages from Microsoft, Hotfixes and OEM updates.

• Microsoft software updates – Microsoft is responsible for the end-to-end servicing lifecycle for the Microsoft software update packages. These packages can include the latest Windows Server security updates, non-security updates, and Azure Stack feature updates. These update packages are non-cumulative updates and need to be installed one after the other. These updates are fully automated and will update the complete Azure Stack infrastructure.
• OEM hardware vendor-provided updates – Azure Stack hardware partners are responsible for the end-to-end servicing lifecycle (including guidance) for the hardware-related firmware and driver update packages. In addition, Azure Stack hardware partners own and maintain guidance for all software and hardware on the hardware lifecycle host.
• Microsoft hotfixes – Microsoft provides hotfixes for Azure Stack that address a specific issue that is often preventative or time-sensitive. Each hotfix is released with a corresponding Microsoft Knowledge Base article that details the issue, cause, and resolution. Hotfixes are downloaded and installed just like the regular full update packages for Azure Stack. Other the the major updates, Azure Stack hotfixes are cumulative per iteration.

By the way, you can only update Azure Stack multi-node systems, the Azure Stack Development Kit needs to be redeployed.