Nexus 3 - proxy repository auth against internal docker registry

[Daniel Perez]

I have set up a docker proxy repo against an internal docker registry being hosted in our company. This proxy has it's own authentication realm (tied to LDAP) when you want to push/pull. The authentication methods differ compared to my nexus3 instance (our nexus uses company email as username and internal docker registry uses unixid, same password though)

What would be the proper way to pass the right credentials when doing docker login to authenticate against the proxied docker registry? 

registry url = some-registry.mycompany.com

our nexus url = nexusdev-3.mycompany.com:18501 (port I used for this proxy registry)

If I do docker login some-registry.mycompany.com and do docker pulls/pushes, it works

if i try doing

docker login nexusdev.mycompany.com:18501 and use the internal registry credentials, I cannot login. I have to use my nexus credentials to log in.

- Daniel

[Peter Lynch]

Hi Daniel,

Requiring your Nexus credentials would be Nexus working as designed. Nexus does not forward your credentials to the remote proxied repository for authentication.

It sounds like you need to configure Nexus to use the same LDAP server that your internal registry is using. If you do this, the you should be able to login to Nexus ( and access the Nexus repository ) using LDAP credentials.

 

- Daniel

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