![]() You can use this ability to maintain and update copies of public base images in your Azure container registries, and then to rebuild application images that depend on base images.ĪCR Tasks dynamically discovers base image dependencies when it builds a container image. Track base image updatesĪCR Tasks includes the ability to automatically build images for you when a container's base image is updated. You can track base image updates in your own Azure container registries and optionally in upstream public registries. The next section describes using ACR Tasks to track base image updates when building application updates. Azure Container Registry provides an image import capability to easily copy content from public registries or other Azure container registries. Then, ensure that you build your application images by referencing the private base images. Maintain copies of base imagesįor any content in your registries that depends on base content maintained in a public registry such as Docker Hub, we recommend that you copy the content to an Azure container registry or another private registry. Members of a team might need to track this base image for testing, or need to regularly update the image when developing application images. For example, a base image could be a shared service component image that needs to be tracked. In some cases, such as a private development team, a base image might specify more than OS or framework. Each application image must then also be rebuilt to include these upstream fixes now included in your base image. When these upstream updates occur, you must also update your base images to include the critical fix. ![]() Security patches are another common cause for a base image update. Several of your application images might share a common base image.Ī base image is often updated by the image maintainer to include new features or improvements to the OS or framework in the image. ![]() These base images are themselves typically based on public upstream images. ![]() They might also include application frameworks such as Node.js or. Base images typically contain the operating system, for example Alpine Linux or Windows Nano Server, on which the rest of the container's layers are applied. What are base images?ĭockerfiles defining most container images specify a parent image from which the image is based, often referred to as its base image. This article provides background information about updates to an application's base image and how these updates can trigger an Azure Container Registry task. ![]()
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