docker login addes an extra registry setting to .docker/config.json

Solution In Progress - Updated -


  • When I executes docker lgoin, my ~/.docker/config.json always contains some one extra registry.

  • For example, when I login to with

# docker login
  • Then, my ~/.docker/config.json is configured as:
    "auths": {
        "": {
            "auth": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
            "email": ""
        "": {
            "auth": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
            "email": ""
  • Why "" with email has been added?


  • Red Hat Enterprise Linux
    • 7.2 (docker 1.10.3)

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