Here’s the Deal

Docker Hub vs Docker Registry 2.0

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When comparing Docker Hub vs Docker Registry 2.0, the Slant community recommends Docker Registry 2.0 for most people. In the question“What are the best docker image private registries?” Docker Registry 2.0 is ranked 2nd while Docker Hub is ranked 15th. The most important reason people chose Docker Registry 2.0 is:

Currently includes in-memory, local filesystem, Azure, and S3.

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Common Questions

What are the best docker image private registries?

Pros

Pro
Shares user accounts with the dominant public registry, Docker Hub

Pro
Maintains several storage drivers to allow for different models of image retention

Currently includes in-memory, local filesystem, Azure, and S3.

Pro
Simple to set up

https://docs.docker.com/registry/#basic-commands

Pro
Only supports docker images

If you want more then go somewhere else! :)

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Cons

Con
No longer free

Rate limits on downloads can royally screw your deployments. In 2021, they will start deleting containers which haven't been pulled for six months. This will suck for stable software which doesn't get redeployed frequently.

Con
Gives no metadata about image tags beyond their name

No information about when the image was created, pushed, what Dockerfile it came from, what user(s) pushed it, etc.

Con
Poor user interface design

Con
Default to public makes it dangerous

Since by default your account will create new repositories publicly, you could fairly easily leak sensitive images with one bad push.

Con
Biggest CON there is that it cannot control deleting of images properly

Bottom line is this makes docker registry suck when your harddisk fills up at the wrong time and you cannot push out your builds!

Con
No inbuilt access control provided

Authentication or Authorization is not provided by default and needs to be handled externally. An optional authentication should have been provided, given that docker client has inbuilt authentication.