I have a new machine with a docker engine. I want to pull down a private docker image from docker.com.
I can pull down any public docker image, no problem.
klas#dockerengine:~$ docker pull nginx
latest: Pulling from nginx
39bb80489af7: Pull complete
df2a0347c9d0: Pull complete
[...]
But my private image fails:
klas#dockerengine:~$ docker pull mellbourn/privaterepo
Pulling repository mellbourn/privaterepo
FATA[0002] Error: image mellbourn/privaterepo:latest not found
What should I do?
It may have to do with SSH, but I know very little about SSH.
You need to run docker login before you can access private repositories.
Related
we have an airgapped environment setup on prem and we are trying to pull docker images using proxy from a private gitlab registry. But, whenever we try to pull images, we are getting this error:
Error response from daemon: manifest for <docker_image> not found
But, when we try to pull from our local machines (not airgapped) we can pull the images just fine and no issues.
We are certain that we have correctly setup our proxy since we can see in the proxy logs that it can successfully connect to registry.gitlab.com.
But somehow it still fails to pull images. Additionally we are able to pull from other registries like AWS ECR etc. It's only on GitLab Registry that we fail to pull.
We use this command to pull docker images:
docker login <gitlab_repo>
we got:
Login Succeeded
then:
docker pull <docker_image>
And we got:
Error response from daemon: manifest for <docker_image> not found
We were expecting to be able to pull the images since we made sure that the image is existing in the repository and we can pull the image using our local machines.
We need to pull all our base images form a private docker registry. Is pulling the image from
docker hub and pushing it to the private registry the only option to achieve the above requirement.
Also how to pass credentials of my private registry and tell my Dockerfile to pull from the private registry instead of the docker hub
We need to pull all our base images form a private docker registry. Is pulling the image from docker hub and pushing it to the private registry the only option to achieve the above requirement.
You need to use docker login to log into your private registry before you execute docker pull\push commands
Also how to pass credentials of my private registry and tell my Dockerfile to pull from the private registry instead of the docker hub
The registry's address is to be specified in the image tag name as exampled here:
docker tag nginx myregistry.azurecr.io/samples/nginx
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’ve created a docker image and pushed it to docker hub as public repo.
When I try to do pull it, I get an error:
docker pull myname/book-store
Error response from daemon: manifest for myname/book-store:latest not found
I see this image in the docker hub
I’ve pushed it to docker hub:
docker tag book-store:1.0.1 myuser/book-store:1.0.0
docker push myuser/book-store:1.0.0
Any idea what could be missing here ?
You are not specifying a tag when pulling your image, so docker tries to pull :latest, which isn't there.
docker pull myname/book-store:1.0.0
Should work OK
There's a good post about :latest here
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