Guys, using the docker image here https://hub.docker.com/r/sonatype/nexus/ and trying to configure a docker hub proxy registry using this guide https://help.sonatype.com/repomanager3/formats/docker-registry/proxy-repository-for-docker. Based on the guide I did not setup a HTTP connector but if I do not I cannot pull using docker from nexus and get 404 returned from nexus. if i setup a http connector it works! Why is this?
See here for an explanation:
Rich
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Thanks so much for the reply! I’m really confused here. So seems there is a conflict on the info coming from these Sonatype articles:
- Proxy Repository for Docker
- Docker Repository Configuration and Client Connection – Sonatype Support
One says HTTP connector is needed and one that it isn’t 
Also, if docker client does not support the use of a context then how come this works?
* List item docker pull registry.hub.docker.com/library/busybox
I’m new to docker and nexus (and DevOps!). Looking at the statement in the 1st link i posted:
“If you intend users to access the proxy repository directly, you may wish to configure a Repository Connector as explained in SSL and Repository Connector Configuration. This is not necessary for proxy content that is accessed via a Docker group.”
So in this context what does directly mean? Does this mean with the docker client as opposed to browsing the repo with a web browser ?
That isn’t a context path of “library”, the context path is still “/”. All docker registries run on context path “/”. You can access the repository on context path “/” via a connector port in the docker repository configuration. Or alternatively, you can set up a reverse proxy in front of Nexus Repo that maps “/” to the repository URL. In that case a connector port is not needed.
Darragh, the docker image you are using from Docker Hub is the older Nexus 2. You need Nexus 3 to run a docker hub proxy repository. It looks like you are trying to follow the Nexus 3 documentation, but you’ll need to pull the image for Nexus 3 which can be found at Docker Hub.
Apologies. Posted wrong link to Docker Hub. I am using the image with nexus version 3.19.1-01
Can anyone assist with this one?