Windowsoffers four container base images that users can build from. Each base image is a different type of the Windows or Windows Server operating system, has a different on-disk footprint, and has a different set of the Windows API set.
All Windows container base images are discoverable through Docker Hub. The Windows container base images themselves are served from
mcr.microsoft.com, the Microsoft Container Registry (MCR). This is why the pull commands for the Windows container base images look like the following:
The MCR does not have its own catalog experience and is meant to support existing catalogs, such as Docker Hub. Thanks to Azure's global footprint and coupled with Azure CDN, the MCR delivers an image pull experience that is consistent and fast. Azure customers, running their workloads in Azure, benefit from in-network performance enhancements as well as tight integration with the MCR (the source for Microsoft container images), Azure Marketplace, and the expanding number of services in Azure that offer containers as the deployment package format.
Many Windows users want to containerize applications that have a dependency on .NET. In addition to the four base images described here, Microsoft publishes several Windows container images that come pre-configured with popular Microsoft frameworks, such as a the .NET framework image and the ASP .NET image.
The Windows Server image (3.1 GB) is slightly smaller in size from the Windows image (3.4 GB). The Windows Server image also inherits all the performance and reliability improvements from the Server Core image, has GPU support, and has no limits for IIS connections. To use the latest Windows Server image, you'll need a Windows Server 2022 installation. The Windows image is not available for Windows Server 2022.
Microsoft provides "insider" versions of each container base image. These insider container images carry the latest and greatest feature development in our container images. When you're running a host that is an insider version of Windows (either Windows Insider or Windows Server Insider), it is preferable to use these images. The following insider images are available on Docker Hub:
Windows Server Core and Nanoserver are the most common base images to target. The key difference between these images is that Nanoserver has a significantly smaller API surface. PowerShell, WMI, and the Windows servicing stack are absent from the Nanoserver image.
Nanoserver was built to provide just enough API surface to run apps that have a dependency on .NET core or other modern open source frameworks. As a tradeoff to the smaller API surface, the Nanoserver image has a significantly smaller on-disk footprint than the rest of the Windows base images. Keep in mind that you can always add layers on top of Nano Server as you see fit. For an example of this check out the .NET Core Nano Server Dockerfile.
From what I read it looks like I will need to create my images or at least run them in containers in "hyperv" isolation mode. Correct? Or can the docker host itself run a different version of the OS (like nanoserver 1809 or whatever)? I'm using Visual Studio to build all of this locally and am also using docker-compose where I can specify the isolation mode in the yml file. But I don't know how to do that when I publish my images to my Docker Hub through
VS.NET. My images publish successfully, but then when I try to use docker pull to bring them down to the Windows 2016 Server I get this error:
I've just taken what MattT provided and added it to the beginning of the Dockerfile that
VS.NET generated when I added DockerSupport. I know I have goofed my Dockerfile up because it doesn't build / publish or run my webapi project (as it did prior to adding the new commands). I assume it has something to do with my FROM statements. I've read so much, but don't yet understand how layering works, among other things.
There's a difference between what is supported and what is available. Running .NET Core in a container on Windows Server 2016 is supported but there is not an available image for it. You're left to define your own.
Your options for what Windows container versions can run on a Windows Server 2016 host are limited to only Windows Server 2016 containers. This means you cannot run a nanoserver:1809 container on a Server 2016 host, for example. This is illustrated in the Windows container version compatibility matrix:
Note that nanoserver:sac2016 has long been out of support so it would not be a recommended base image. There is not any currently supported tag for Nano Server on 2016. Instead, it'd be recommended to use Windows Server Core. The servercore:ltsc2016 is your best option for a supported tag.
... I figured I would make a new Windows Server 2019 CORE image (default deployment option) instead of a full desktop. I always found it strange you didn't have an option to deploy a Core server deployment of Windows Server from Azure Marketplace.
Shout out to ALL the MVPs (and other friends) who pointed out my statement about "Core images not being available in Azure Marketplace" being incorrect and keeping me honest. I was working on old info from my days in the Azure Compute group where I worked next to the team who built and published images for Windows Server. I thought it would be a good subtext storyline starting the blog post instead of just a click-walk-through on the actual meat of the article with is about making a Custom Image and bringing it to Azure. Brings up a good discussion point:
Note: You will get some errors based on if your image is domain joined or if there are group policies in place. I got a number of red error dumps from PowerShell commands, but they were expected since my VM is not domain joined.
You will already need to have a ResourceGroup in azure that you can store these VM images in and you will want to define the location for the storage group to be in the same area where you will be using this image. I assume you are using the same system where the VHD is located OR you have copied it to your admin workstation locally before uploading it.
In this blog post, the custom local VM that was created was a Windows Server 2019 core install server that was customized, generalized, uploaded and converted into a specialized Image for use in Azure. Because I took the time to build my own custom image and upload it into my Azure subscription - I can deploy as many Windows Server 2019 core boxes as I need for my projects now.
The following content is a high level overview of the process Amazon uses to create AWS Windows AMIs. Details include what you can expect from an official AWS Windows AMI, aswell as the standards that Amazon uses to validate AMI security and reliability.
When a new version of Windows Server is released, we download the Windows ISOfrom Microsoft and validate the hash Microsoft publishes. An initial AMI is thencreated from the Windows distribution ISO. The drivers needed to boot on EC2 areincluded in addition to our EC2 launch agent. To prepare this initial AMI forpublic release, we perform automated processes to convert the ISO to an AMI.This prepared AMI is used for the monthly automated update and releaseprocess.
New AMI offerings are created for new OS releases. You can count on Amazon releasingBase, Core, and SQLExpress/Standard/Web/Enterprise offerings in English and otherwidely used languages. The primary difference between Base and Core offerings isthat Base offerings have a desktop/GUI whereas Core offerings are PowerShellcommand line only. For more information about Windows Server Core, see -us/windows-server/administration/server-core/what-is-server-core.
Amazon provides updated, fully-patched AWS Windows AMIs within five business daysof Microsoft's patch Tuesday (the second Tuesday of each month). The new AMIsare available immediately from the Images page in the Amazon EC2console. The new AMIs are available in the AWS Marketplace and the QuickStart tab of the launch instance wizard within a few days oftheir release.
Instances launched from Windows Server 2019 and later AMIs may show aWindows Update dialog message stating "Some settings are managed by yourorganization." This message appears as a result of changes in Windows Server2019 and does not impact the behavior of Windows Update or your ability tomanage update settings.
To ensure that customers have the latest security updates by default, AWS keeps AWS Windows AMIs available for three months. After releasing new AWS Windows AMIs, AWS makes the AWS Windows AMIs that are older than three months private within 10 days.
After AWS makes an AMI private, you may no longer retrieve it by any method. In the console, the AMI ID field for a private AMI states, Cannot load detail for ami-1234567890abcdef0. You may not be permitted to view it.
The AWS Windows AMIs; in each release have new AMI IDs. Therefore, we recommendthat you write scripts that locate the latest AWS Windows AMIs by their names,rather than by their IDs. For more information, see the followingexamples:
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