Is there anyway to proxy or mirror the following Docker registries with my own Private Docker Registry?
Google Container Registry
AWS EC2 Container Registry
Azure Container Registry
Quay.io
DockerHub
I want to use a Private Registry to store all Docker Images I need.
I want to pull Images without changing the repo/image:tag name when doing a docker pull? For example, with Nexus if I want to do a:
docker pull gcr.io/google_containers/metrics-server-amd64:v0.2.1
I must change the repo name:
docker pull mynexus.mycompany.com/google_containers/metrics-server-amd64:v0.2.1
Is there any docker/kubernetes config that says if someeone does a pull if a gcr.io Image just go to mynexus.mycompany.com instead and use as a pass thru cache.
GCR, ECR, ACR and Quay.io not supported current docker
Try this proxy
https://github.com/rpardini/docker-registry-proxy
https://github.com/rpardini/docker-caching-proxy-multiple-private
In Sonatype Nexus,
create a "docker (proxy)" repository.
create a "docker (group)" repository.
In the group, repository, add both the proxy and any hosted repos
You should now be able to refer to the group repository URL, qualified with your image names and tags, to retrieve any image in any repository that the group can see. You will need to set-up individual proxies for each of GCR, Quay, etc. Also, your image build processes will need to push to the one of your hosted repositories, NOT to the group repository. You push to your hosted, and pull from your group.
Related
We've just brought Artifactory into our organization. We have a lot of Fargate stacks that are pulling the Docker images from ECR. We now want to pivot and store our Docker images in Artifactory and tell Fargate to pull the images from Artifactory.
Does anyone know how to do this?
Thanks
An Artifactory repository for Docker images is a Docker registry in every way, and one that you can access transparently with the Docker client (see documentation)
In Artifactory, start by creating a local Docker repository, then follow the "Set Me Up" instructions for that repository to upload/deploy your docker images to it.
The "Set Me Up" dialog for the Docker repository also provides the steps to have your docker clients consume/download the images from your Docker repository/registry. You would just have to replace the references of ECR with the one for your Artifactory docker repository/registry in your docker client commands.
This documentation page provides step-by-step information on how to use Artifactory as a Docker registry.
Artifactory also provides the capabilities of Remote Docker repositories, which provides proxying/caching of external registries, and Virtual Docker repositories for the aggregation of both local and remote repositories into one single entry point.
I have a private registry at the url registry.lab.example.com where I can push images to from my master node in ocp cluster. When I go about launching a new app referring an image from this private registry, the lookup fails with a error message that the image is not found.
oc new-app --docker-image=registry.lab.example.com/openshift/nginx
My private registry is not even polled to look for the images and that'y why the deployment fails. Is there a way I can add this private registry in the list of to be searched repositories when docker tries to find an image?
There's --add-registry option for docker daemon in RHEL's docker branch (see registry-externally-accessible, check if it's fit to your environment). In addition, you can configure the registry a primary docker source (see pull-through-cache).
Expand RED HAT CONTAINER REGISTRY with a local Docker image repository.
As a Docker user, I can work with the registry (pull, push) everything is OK!
But also, as a user, I can upload an image with the docker hub with the pull command.
For example:
$ docker pull debian
Question:
How to prevent the user to "pull" the image with docker hub and allow using only the openshift internal registry?
Those. Is it possible to configure any config so that the user accesses the internal repository of images?
I have something on my mind that is bugging me. When running docker images I see a list of my local images I have in my docker environment. When pulling Images I pull it from a registry and more specific pull the specified tag managed by the repository.
so there is the registry as the big hub to store all image
repositories
and the repository is storing commits/tagged versions of a specific image
But what is docker images then? It's a registry as well isn't it? It holds all images that I've built locally or pulled.
If my claim is valid:
How does it comply with running a private registry (mentioned here https://docs.docker.com/registry/deploying/)
Running this docker run -d -p 5000:5000 --restart=always --name registry registry:2
Would deploy this new registry into my docker images...
So now I have a registry within my registry... registception?
What is the difference besides the custom registry is deployable?
Its not a local image registry as other questions have pointed. It is an image cache. The purpose of the image cache is to avoid having every time to download the same image whenever you do a docker run.
docker images simply lists all the cached images on the machine. Whenever there is newer image on the registry, the image(some layers) are downloaded and cached when doing docker pull .... Also, when a layer exists in the local cache, docker tells you that, example:
Step 2/2 : CMD /bin/bash
---> Using cache
On the other hand, a docker registry is a central repository to store images. It provide a remote api to pull and push images. The local image cache does not have this feature. Images in the local cache are read and stored used local docker commands that simply read files under /var/lib/docker/...
To make things clear, think of Docker remote registries (such as Docker Hub) as the remote Git repositories. You pull Docker images (like git repositories) that you need and you play with it.
Like remote Git repositories such as GitHub\BitBucket, Docker registries are also public and private. Public registries are for public usage and open-source projects. Examples include in like Docker Hub. Where as private registries are for organizational use or for your own. Examples for private registries include Azure Container Registry, EC2 Container Registry etc.
The official Docker Registry image is just a Docker registry image for your own system, you can't share them with others unless you have a server or a public Internet IP address. Think of it as Bonobo Private Git Server for Windows.
Your local image registry as you mentioned are all those images that you have build locally or pulled from a registry public or private you can see it like a local cache of images that you can re use without download or rebuild each time.
Running the registry what actually does is to spin up a server that implements the Docker Registry API which allows users to push, pull, delete and handles the storage of this images and their layers. See it like a central repository like npm, nexus
For example if you run the registry in your.registry.com:5000
You can do things like
docker build -t your.registry.com:5000/my-image:tag .
docker push your.registry.com:5000/my-image:tag
So others that have access to your server can pull it
docker pull your.registry.com:5000/my-image:tag
I am trying to use Docker + Kubernetes for my application management.
I have installed kubectl, kubeadm, kubelet (got the steps from google docs) for Kubernetes cluster.
Now cluster is having 2 node(1 Master, 1 Child)
I have a customize Dockerfile , how can it use it as a Kubernetes pods ?
If this is not possible,
How to transmit the docker build to the Kubernetes child from master.
You could use a private Docker registriy outside or inside the cluster or work with local (pre-pulled) images.
Outside the cluster you might want to look at these:
Docker registry image
Jfrog Artifactory registry
Sonatype Nexus
Dockerhub private registry
Google private registry
Amazon ECR
Quai.io registry
Azure registry
Inside the cluster you might want to look at the Private Docker Registry in Kubernetes
If you're not interested to use a registry, you could also build the image on every Kubernetes node so that Docker doesn't have to pull it. To avoid that Kubernetes tried to pull anyways you would then have to set the imagePullPolicy of your containers to Never. That's described within the official documentation.
Dockerfiles create images which are used by pods, Kubernetes only uses your created docker image it doesn't build docker images for you. I think what you want to do is:
create an image from your dockerfile by using docker build
send that image to dockerhub using docker push
create a kubernetes deployment that uses your image https://kubernetes.io/docs/user-guide/deployments/
That should get you in the right direction but you will have to read up more :)