Failed to pull image "Authentication is required" but docker pull works fine

[bluntpeak]

Wondering if I am missing something here.

Background: Using docker-machine to provision nodes and weave for networking between containers.

I can use docker pull just fine from my mac onto a remote node using the env vars setup by docker-machine env nodename

But as soon as rocker run needs to pull an image it fails with "Authentication is required"

Should Rocker not find the ~/.dockercfg for access to our private repo just the same as other docker tools seem to?

Currently running:

Registry V1 (not updated to V2 yet)

Client version: 1.7.1
Client API version: 1.19
Go version (client): go1.4.2
Git commit (client): 786b29d
OS/Arch (client): darwin/amd64
Server version: 1.8.2
Server API version: 1.20
Go version (server): go1.4.2
Git commit (server): 0a8c2e3
OS/Arch (server): linux/amd64