Falling back to v1 when image can't be found.

[rmb938]

Output of docker version:

Client:
 Version:      1.12.0
 API version:  1.24
 Go version:   go1.6.3
 Git commit:   8eab29e
 Built:        Thu Jul 28 21:15:28 2016
 OS/Arch:      darwin/amd64

Server:
 Version:      1.12.1
 API version:  1.24
 Go version:   go1.6.3
 Git commit:   23cf638
 Built:        Thu Aug 18 17:52:38 2016
 OS/Arch:      linux/amd64

Output of docker info:

Containers: 0
 Running: 0
 Paused: 0
 Stopped: 0
Images: 28
Server Version: 1.12.1
Storage Driver: aufs
 Root Dir: /mnt/sda1/var/lib/docker/aufs
 Backing Filesystem: extfs
 Dirs: 193
 Dirperm1 Supported: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
 Volume: local
 Network: null overlay bridge host
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Security Options: seccomp
Kernel Version: 4.4.17-boot2docker
Operating System: Boot2Docker 1.12.1 (TCL 7.2); HEAD : ef7d0b4 - Thu Aug 18 21:18:06 UTC 2016
OSType: linux
Architecture: x86_64
CPUs: 4
Total Memory: 3.858 GiB
Name: bats
ID: LCGK:BYEJ:EYJH:W3OJ:KEUV:U4SR:AQE5:K4UA:WR3M:7OOF:ZOAN:G34K
Docker Root Dir: /mnt/sda1/var/lib/docker
Debug Mode (client): false
Debug Mode (server): true
 File Descriptors: 14
 Goroutines: 24
 System Time: 2016-08-30T14:34:12.459579276Z
 EventsListeners: 0
Registry: https://index.docker.io/v1/
Labels:
 provider=virtualbox
Insecure Registries:
 127.0.0.0/8

Additional environment details (AWS, VirtualBox, physical, etc.):

Docker Machine and the same issue happens in Docker for Mac. Possibly happens outide of these environments as well but I haven't tested yet.

Steps to reproduce the issue:

1. Login to a private v2 repo
2. Try to pull an image that doesn't exist.
3. Docker tries from v2, fails, and falls back to v1 and fails with a weird error.

Describe the results you received:

Docker Client:

docker pull myprivaterepo.com/team/image

Using default tag: latest
Pulling repository myprivaterepo.com/team/image
Error: Status 400 trying to pull repository team/image: "{\n  \"errors\" : [ {\n    \"status\" : 400,\n    \"message\" : \"Unsupported docker v1 repository request for 'myprivaterepo'\"\n  } ]\n}"

Docker Daemon Logs:

time="2016-08-30T14:25:07.047115550Z" level=debug msg="Calling POST /v1.24/images/create?fromImage=myprivaterepo.com%2Fteam%2Fimage&tag=0.0.1"
time="2016-08-30T14:25:07.047168891Z" level=debug msg="Client and server don't have the same version (client: 1.12.0, server: 1.12.1)"
time="2016-08-30T14:25:07.111103877Z" level=debug msg="hostDir: /etc/docker/certs.d/myprivaterepo.com"
time="2016-08-30T14:25:07.127364932Z" level=debug msg="hostDir: /etc/docker/certs.d/myprivaterepo.com"
time="2016-08-30T14:25:07.127468960Z" level=debug msg="Trying to pull myprivaterepo.com/team/image from https://myprivaterepo.com v2"
time="2016-08-30T14:25:07.535073005Z" level=error msg="Attempting next endpoint for pull after error: manifest unknown: The named manifest is not known to the registry."
time="2016-08-30T14:25:07.535232986Z" level=debug msg="Trying to pull myprivaterepo.com/team/image from https://myprivaterepo.com v1"
time="2016-08-30T14:25:07.554323335Z" level=debug msg="hostDir: /etc/docker/certs.d/cmyprivaterepo.com"
time="2016-08-30T14:25:07.554478645Z" level=debug msg="attempting v1 ping for registry endpoint https://myprivaterepo.com/v1/"
time="2016-08-30T14:25:07.661466205Z" level=debug msg="PingResult.Version: \"\""
time="2016-08-30T14:25:07.665454974Z" level=debug msg="Registry standalone header: ''"
time="2016-08-30T14:25:07.665523217Z" level=debug msg="PingResult.Standalone: true"
time="2016-08-30T14:25:07.665540950Z" level=debug msg="Endpoint https://myprivaterepo.com/v1/ is eligible for private registry. Enabling decorator."
time="2016-08-30T14:25:07.665616984Z" level=debug msg="[registry] Calling GET https://myprivaterepo.com/v1/repositories/team/image/images"
time="2016-08-30T14:25:32.614110410Z" level=error msg="Not continuing with pull after error: Error: Status 400 trying to pull repository team/image: \"{\\n  \\\"errors\\\" : [ {\\n    \\\"status\\\" : 400,\\n    \\\"message\\\" : \\\"Unsupported docker v1 repository request for 'myprivaterepo'\\\"\\n  } ]\\n}\""

Describe the results you expected:

Return "Unknown Image" or something along those lines.

[Veske]

This issue is indeed annoying.

[thaJeztah]

Docker 1.9 and up have a --disable-legacy-registry daemon option that allows you to disable the fallback to V1 registries. In future, this will be the default; see Interacting with V1 registries.

Does that solve your issue?

[Veske]

Yes, this solves it. Thanks!

[thaJeztah]

--disable-legacy-registry is now the default for docker 17.06 and up (see the rebase notes); https://github.com/docker/docker-ce/releases/tag/v17.06.0-ce, and the pull request: #33629)

I think that resolves the issue, so I'll close this one.