Bug 1347805

Summary:	better error message when trying to pull from a integrate registry w/o being logged in.
Product:	Red Hat Enterprise Linux 7	Reporter:	Peter Ruan <pruan>
Component:	docker	Assignee:	Antonio Murdaca <amurdaca>
Status:	CLOSED NOTABUG	QA Contact:	atomic-bugs <atomic-bugs>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	7.4	CC:	dwalsh, lsm5
Target Milestone:	rc	Keywords:	Extras
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Hardware:	Unspecified
OS:	Unspecified
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Fixed In Version:		Doc Type:	If docs needed, set a value
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Last Closed:	2016-10-23 13:42:06 UTC	Type:	Bug
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Embargoed:

Description Peter Ruan 2016-06-17 17:17:21 UTC

Description of problem:
  The error message when an unauthenticated user is trying to pull an image from an integrated registry is misleading.


Version-Release number of selected component (if applicable):
Docker version 1.10.3, build 02f13c2-unsupported

How reproducible:
always.

Steps to Reproduce:
1. create and push an image an authenticated user
2. logout as the user
3. do docker pull <uploaded_image>

Actual results:
[root@host-8-172-77 ~]# docker images
REPOSITORY                                                                            TAG                 IMAGE ID            CREATED             SIZE

172.30.116.116:5000/6rqgl/tc487929-busybox                                            local               47bcc53f74dc        3 months ago        1.113 MB
172.30.116.116:5000/oloay/tc487929-busybox                                            local               47bcc53f74dc        3 months ago        1.113 MB
172.30.116.116:5000/qp62u/tc487929-busybox                                            local               47bcc53f74dc        3 months ago        1.113 MB


[root@host-8-172-77 ~]# docker pull 172.30.116.116:5000/qp62u/tc487929-busybox:local
Trying to pull repository 172.30.116.116:5000/qp62u/tc487929-busybox ... 
Pulling repository 172.30.116.116:5000/qp62u/tc487929-busybox
Error: image qp62u/tc487929-busybox not found

Expected results:
docker should give the error that the user is denied access because of authentication issue.

Additional info:

Comment 2 Daniel Walsh 2016-08-19 22:41:58 UTC

Shishir can I get an update on this?

Comment 3 Antonio Murdaca 2016-10-23 13:42:06 UTC

This is how docker/distribution and docker works as of today. You get a 404, thus an image not found, not because the image isn't there but because docker first attempts to pull from a V2 registry, it gets unauthorized, tries to contact a V1 registry, the V1 registry doesn't exists, it gets back a 404 which is then translated to an image not found. What you get at the end of this "probing" is just the last error in the chain (the image not found).
There are lengthy issues upstream about this (opened by me https://github.com/docker/docker/issues/21054, https://github.com/docker/docker/issues/19834), none of those are feasible because of how docker is designed today, and this design won't easily change in the near future (it could cost a huge compatibility issue).

I'm closing this as not a bug.

Comment 4 Daniel Walsh 2016-10-24 11:57:10 UTC

Is this worthy of a blog?  Just reference this bugzilla, talk about why this is and what it means.  Most of your content could be taken from the bugzilla.

Comment 5 Antonio Murdaca 2016-10-24 12:01:41 UTC

I've already written about this in this skopeo issue also https://github.com/projectatomic/skopeo/issues/235#issuecomment-254820427

I've added to my todo list to write a blog post about this (it'll be really short though)