![]() ![]() ![]() You can have image definitions that share one or two, but not all three values. These are used to find a specific image definition. There are three parameters for each image definition that are used in combination - Publisher, Offer and SKU. You don't deploy a VM from an image definition, but from the image versions created from the definition. An image definition is like a plan for all of the details around creating a specific image. The image definition holds information about why the image was created and also contains Image metadata such as, what OS it is for, features it supports and other information about using the image. Image definitions are a logical grouping for versions of an image. Image versions can be used multiple times. Like a managed image, when you use an image version to create a VM, the image version is used to create new disks for the VM. You can have multiple versions of an image as needed for your environment. It's a definition of a type of image.Īn image version is what you use to create a VM when using a gallery. This includes whether the image is Windows or Linux, release notes, and minimum and maximum memory requirements. Image definitions are created within a gallery and they carry information about the image and any requirements for using it to create VMs. Like the Azure Marketplace, a gallery is a repository for managing and sharing images and other resources, but you control who has access. An image source can be an existing Azure VM that is either generalized or specialized, a managed image, a snapshot, a VHD or an image version in another gallery. This is a resource that can be used to create an image version in a gallery. When you use a gallery to store images, multiple resource types are created: Resource If you have a large number of images that you need to maintain, and would like to make them available throughout your company, you can use an Azure Compute Gallery as a repository. The image remains in storage and can be used over and over again to create new VMs. When you create a VM from the image, a copy of the VHDs in the image are used to create the disks for the new VM. Applies to: ✔️ Linux VMs ✔️ Windows VMs ✔️ Flexible scale sets ✔️ Uniform scale setsĪn image is a copy of either a full VM (including any attached data disks) or just the OS disk, depending on how it's created. ![]()
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