While trying to signup with docker hub by selecting a suitable plan, I see pricing is based on Private Repositories Required and Parallel Builds desired.
What is a PARALLEL BUILD in this context?
PS:
After a bit of an internet search, I found that docker hub can pull up my source code from external repositories and build an image by itself and later publish the same into Hub. If this is true and I don't want to use docker hub build service, can I ignore the PARALLEL BUILD part entirely?
Dockerhub is a service provided by Docker for finding and sharing container images with your team. It provides the following major features:
Repositories: Push and pull container images.
Teams & Organizations: Manage access to private repositories of
container images.
Official Images: Pull and use high-quality container images provided
by Docker.
Publisher Images: Pull and use high-quality container images provided
by external vendors. Certified images also include support and
guarantee compatibility with Docker Enterprise.
Builds: Automatically build container images from GitHub and
Bitbucket and push them to Docker Hub
Webhooks: Trigger actions after a successful push to a repository to
integrate Docker Hub with other services.
More info here.
If you see the pricing page of dockerhub. There are two things you should know:
PARALLEL BUILD specifies the number of images that you can build
parallelly (con-currently). The parallelism is across all of the
repos owned by you.
Private Repository specify the number of repository that are private and not exposed publicly.
If you're new to docker and trying out it first time then its ok to go with dockerhub free plan where you can have max 1 private repository and 1 parallel build count.
If you want to store docker images of your project privately that is hosted somewhere on public cloud like AWS then I suggest to use docker registry provided by those cloud providers like AWS ECR, Azure ACR, Google container registry and so on.
Or else you can host docker image privately by running docker registry inside container. Check this.
Hope this helps.
Related
I was wondering is it possible to use cached docker images in gitlab registry for gitlab-ci?
for example, I want to use node:16.3.0-alpine docker image, can I cache it in my gitlab registry and pull it from that and speed up my gitlab ci instead of pulling it from docker hub?
Yes, GitLab's dependency proxy features allow you to configure GitLab as a "pull through cache". This is also beneficial for working around rate limits of upstream sources like dockerhub.
It should be faster in most cases to use the dependency proxy, but not necessarily so. It's possible that dockerhub can be more performant than a small self-hosted server, for example. GitLab runners are also remote with respect to the registry and not necessarily any "closer" to the GitLab registry than any other registry over the internet. So, keep that in mind.
As a side note, the absolute fastest way to retrieve cached images is to self-host your GitLab runners and hold images directly on the host. That way, when jobs start, if the image already exists on the host, the job will start immediately because it does not need to pull the image (depending on your pull configuration). (that is, assuming you're using images in the image: declaration for your job)
I'm using a corporate Gitlab instance where for some reason the Dependency Proxy feature has been disabled. The other option you have is to create a new Docker image on your local machine, then push it into the Container Registry of your personal Gitlab project.
# First create a one-line Dockerfile containing "FROM node:16.3.0-alpine"
docker pull node:16.3.0-alpine
docker build . -t registry.example.com/group/project/image
docker login registry.example.com -u <username> -p <token>
docker push registry.example.com/group/project/image
where the image tag should be constructed based on the example given on your project's private Container Registry page.
Now in your CI job, you just change image: node:16.3.0-alpine to image: registry.example.com/group/project/image. You may have to run the docker login command (using a deploy token for credentials, see Settings -> Repository) in the before_script section -- I think maybe newer versions of Gitlab will have the runner authenticate to the private Container Registry using system credentials, but that could vary depending on how it's configured.
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 few docker images composed together in the stack using docker-compose.yml.
Now I want to transfer whole docker compose stack to the other host machine without uploading to the dockerhub,
And deploy it on the docker swarm.
I saw there is a thing called docker compose bundle, would that help?
If you’re deploying on a multi-host swarm (or something similar like Kubernetes or Nomad) you all but need a Docker registry. It doesn’t specifically have to be Docker Hub — quay.io, Amazon’s ECR, Google’s GCR, and self-hosted registries all work fine — but you do need to have pushed the built images somewhere where the orchestrator can retrieve them by name.
I’ve never used docker-compose bundle myself, but its documentation also notes that its operation “requires interaction with a Docker registry”.
The only real alternative is using docker save and docker load to manually move images between machines, but as a manual process it will get tedious very quickly, and you need to make sure an identical set of images are on every machine for consistency. Using a registry will be vastly easier.
The easyest way to do it is to use a Docker registry. The problem with Docker Hub is that you can only have one private registry, the rest must be public or paid.
Thankfully, there are other (free) alternatives:
Deploy your own private registry. Here is a nice tutorial where you can try it in the browser.
Use a free private registry. I personnaly use Codefresh. It can automatically build your image from a private repo (like bitbucket who has free plan too), but you can also just use it like a "simple" docker registry and push and pull your Docker images there.
Aim: to deploy a private registry
Discussion
private repository
I have read multiple posts and now I am confused. I have tried to run a docker container that should serve a private docker registry, but it returns an empty UI. Some posts indicate that it has been deprecated, but some other do not.
images
I used to navigate to dockerhub, but now there is https://store.docker.com?
Questions
Has docker registry been phased out?
Should one now use https://store.docker.com in stead of docker hub?
Docker hub still exists and will remain for the open source projects as it always has.
Docker store is a new offering for commercial images.
The standalone registry does not have a UI, don't believe it ever has. It's intended to be accessed with docker push and docker pull commands.
I'm trying to query docker-cloud repository using this command
docker-cloud repository ls
I get this response.
NAME IN_USE
My repos are located here and have active images
https://hub.docker.com/r/fellfromhell/workshop-python/
What am I doing wrong?
There are 2 different systems: Docker Hub and Docker Cloud.
Docker Hub is a cloud-based registry. Docker Cloud is a service which helps to deploy and manage Dockerized applications. You can link Docker Cloud to repositories hosted on a third party registry. The Docker Hub registry is linked automatically and all your Docker Hub repositories are listed in https://cloud.docker.com/_/repository/list, but, unfortunately, the command
docker-cloud repository ls
returns only repositories that are on a third party registries (see
https://docs.docker.com/apidocs/docker-cloud/#external-repository).
Despite this, you still can inspect your image
docker-cloud repository inspect fellfromhell/workshop-python
and get some data in response. Here is the github issue https://github.com/docker/dockercloud-cli/issues/23