Maybe a simple-to-answer Question: How can I set up a private docker reposiory and limit the Access to only a subset of the Images there that one can pull ? E.g. I have Image1 and Image2 pushed, but want to allow one Image2 being pullable by account USER1 ?
This tends to get into the commercial offerings of docker (DTR). The spec itself for the registry includes all of the capabilities for auth, and you can configure a simple htpasswd based login on the standalone registry. However for the next step up, you get into a token server which docker doesn't have an open source implementation of themselves. You could work around this limitation by deploying multiple registry servers, each with a different set of users in a htpasswd file.
There are various third party implementations of the docker registry that may include these features. In the open source space, there's a project called cesanta/docker_auth that works with docker's stand alone registry and does exactly what you're looking for. The next step up is the harbor project that should be all most organizations need from a registry, but may be more complicated and have more overhead for a small project.
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I have a docker registry that uses htpasswd for authentication. I want to have multiple users each can only pull images from a certain path. For example:
user1 can pull images only from the below path
mydomain.com/v2/user1/
user2 can pull images only from the below path
mydomain.com/v2/user2/
right now each non admin user can pull from anywhere
Is there any way that can I fix it with htpasswd if not what are the alternatives?
Docker Distribution does not provide such level of granularity. You can build something yourself such a put a reverse proxy in front of the registry that has the logic you need or use a more advanced solution such as Harbor or if you want it really light wight, maybe trow fits the bill as well.
I'm working on a CI/CD process for some project and decided that every image will have its own unique tag (#build). This is done so rollback will be possible (I'm on Swarm mode)
The problem is that it will bloat the Docker registry pretty quickly.
Is it possible to control the number of tags/images? (e.g. deleting the oldest if limit has been reached)
If you have private registry and you have Enterprise version (Docker Trusted Registry), then you can set tag limit with FIFO principle. Also it is possible to set pruning policies, e.g. by age.
More info.
With regular Docker Hub, you might achieve something similar with WebHooks and making your own code.
Some third party tools for cleaning basic private registry, by using registry v2 API:
registry-cli
cleanreg
I am trying to use Kubernetes and Jenkins for my deployment of micro services developed using Spring Boot. When I am exploring many YouTube videos and other documentation tutorials are using dockerhub.com as keeping published image as repository.
Can I deploy docker image in Kubernetes by using Jenkins docker image build without using this dockerhub.com ? Means I don't want to share client code in a public place. So can I use Jenkins without dockerhub.com?
You do need to use some registry- kubernetes needs a registry URL to be able to pull and instantiate a particular image as a container in a pod. To avoid having the images themselves be publicly accessible you have 2 options:
use a business account at a public registry. You can get one of these from Docker, or from other services like Google or Quay. When you push images using a business account, you get a private space in the public registry and only your account credentials can push and pull those images. In this case your Kubernetes- and your Jenkins- has to be configured with credentials derived from your account to be able to pull those private images into your cluster.
run a private registry in your cluster or on your non-cluster infrastructure There are many flavors of private registries, including Docker's, Atlassian's, and many others. This keeps your images entirely on your infrastructure. The tradeoff is that you have to configure and run this as a production service, and most private registries suitable for production use have a lot of moving parts for scalable image storage, indexing, backup, and so forth.
I've been considering to use my own private docker registry to distribute some of my projects publicly. However, the moment you add an authentication strategy to your registry, you loose public pull access to all its images.
Is there an easy way to tell the registry some images can be anonymously pulled (not pushed, of course) - in the same way https://hub.docker.com/ works?
I've been reading through https://docs.docker.com/registry docs but so far I found nothing on the matter. I guess it's a use case covered in EE Docker Trusted Registry and not included in the community version:
DTR uses Role Based Access Control (RBAC) to allow you to implement fine-grained access control policies for who has access to your Docker images.
You can check 3rdparty Registry projects that allow fine grain access like Portus or Harbor, I use harbor and the projects set as public can be pulled anonymously
I just read the entire docs on securing a private Docker Registry. In addition to this, there seems to be a "Docker Trusted Registry", which is described as:
Docker Trusted Registry (DTR) lets you run and manage your own Docker image storage service, securely on your own infrastructure behind your company firewall.
Furthermore, the doc goes on to list a DTRs features:
An image registry to store, manage, and collaborate on Docker images
Pluggable storage drivers
Configuration options to let you run DTR in your particular enterprise environment.
Easy, transparent upgrades
Logging, usage and system health metrics
But doesn't the "normal" Docker Registry give me these as well?!?
Are these two things really the same, or is DTR some sort of commercialized offering of a Docker Registry? Or something else? I'm so confused!
New features in Docker Trusted Registry are:
Control access and permissions by user or organisation
Web UI to search and browse repos, manage users and setting
Integrate to CI and CD systems to automate workflows
LDAP/AD integration
Flexible storage
support User audit logs
Soft Delete image tags
Garbage collection
DTR is the paid support service for the registry - see https://hub.docker.com/enterprise/
Basically, they help you setup and will give you support down the road. It might have some niceties, otherwise you are left to your own to figure out how to run the registry.