openstack tripleo container image show doesn't work with docker.io

[Steve Baker]

docker.io expects authenticated URLs to include the namespace, due to its scoping, so the following currently fails:
openstack tripleo container image show docker.io/library/centos:7 -f json
Failure: id a67d1379cef4790c61dc650010dec91f636543e6, status 401, reason Unauthorized text {"errors":[{"code":"UNAUTHORIZED","message":"authentication required","detail":[{"Type":"repository","Class":"","Name":"library/centos","Action":"pull"}]}]}

Instead of using the --registry-url argument, the authentication should just use the image URL.

The delete command probably has the same issue with docker.io, but it appears to have different issues as well so another bug is probably appropriate.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/684863

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/684863
Committed: https://git.openstack.org/cgit/openstack/python-tripleoclient/commit/?id=3cf57669ec8c1d52ae5662967765230895273844
Submitter: Zuul
Branch: master

commit 3cf57669ec8c1d52ae5662967765230895273844
Author: Steve Baker <email address hidden>
Date: Thu Sep 26 11:15:50 2019 +1200

    Don't use --registry-url for image show auth

    This doesn't work for registries like docker.io because they expect
    the authentication url to include the namespace so they can determine
    the allowed scope of the request.

    Instead the image reference is used for authentication, and the docs
    include examples to make it clear that the registry host needs to be
    included in the image reference.

    This change also makes json the default formatter for the show
    command, so it can be used as a drop-in replacement for "skopeo
    inspect" and so that the output format is consistent with the docker
    commands.

    Change-Id: I30ce5c53e3eac758f52f31cc9ed3f2dff35eb4cb
    Closes-Bug: #1845400

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/python-tripleoclient 12.3.0 release.