Friday, 22 March 2019

Tinkering with Docker manifests ? You need Manifest Tool and MQuery

MQuery

A simple utility and backend for querying Docker v2 API-supporting registry images and reporting on "manifest list" multi-platform image support.

This project uses IBM Cloud Functions (built on OpenWhisk) as a backend, in concert with the manifest-tool inspect capability (packaged as a Docker function) to easily report on the status of whether an image is a manifest list entry in the registry, and if so, what architecture/os pairs are supported by the image.

https://github.com/estesp/mquery

docker run --rm mplatform/mquery mplatform/mquery

Image: mplatform/mquery
 * Manifest List: Yes
 * Supported platforms:
   - linux/amd64
   - linux/arm
   - linux/arm64
   - linux/ppc64le
   - linux/s390x
   - windows/amd64:10.0.14393.1593

manifest-tool

manifest-tool is a command line utility that implements a portion of the client side of the Docker registry v2.2 API for interacting with manifest objects in a registry conforming to that specification.

This tool was mainly created for the purpose of viewing, creating, and pushing the new manifests list object type in the Docker registry. Manifest lists are defined in the v2.2 image specification and exist mainly for the purpose of supporting multi-architecture and/or multi-platform images within a Docker registry.

https://github.com/estesp/manifest-tool

docker run --rm mplatform/mquery mplatform/manifest-tool:latest

Image: mplatform/manifest-tool:latest
 * Manifest List: Yes
 * Supported platforms:
   - linux/amd64
   - linux/arm
   - linux/arm64
   - linux/ppc64le
   - linux/s390x
   - windows/amd64:10.0.14393.2312

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