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Troubleshooting
This document contains a list of known issues related to using, building or testing linuxkit.
Images
Packages
Invalid MediaType
Problem
Error: error building and pushing "linuxkit/mkimage-iso-efi-initrd:0e66171ffde9bb735b0e014f811f9626fc8b9bc9": PUT https://index.docker.io/v2/linuxkit/mkimage-iso-efi-initrd/manifests/0e66171ffde9bb735b0e014f811f9626fc8b9bc9: MANIFEST_INVALID: manifest invalid; if present, mediaType in image index should be 'application/vnd.oci.image.index.v1+json' not 'application/vnd.docker.distribution.manifest.list.v2+json'
The above message is caused by registries, notably docker hub, refusing to accept indexes with the
docker media type of application/vnd.docker.distribution.manifest.list.v2+json, rather than the OCI
one application/vnd.oci.image.index.v1+json.
Linuxkit does use the OCI media type, however, if the image already exists in the registry, linuxkit will pull the index down, update it, and push it back up. The above error occurs because the index that exists in the hub, the one that is pulled down, has the older media type, from when the registry accepted it.
Solution
The solution is to force an entirely new build, which will generate the images and index with the correct media type.
linuxkit pkg build --force <path>
linuxkit pkg push <path>