I read the tutorial in this,and it show me can use these commands to pull image to docker registry,like that:
docker pull ubuntu && docker tag ubuntu localhost:5000/batman/ubuntu
docker push localhost:5000/batman/ubuntu
I want to know whether I need to tag already image when I pull image to registry. Is it just only way to pull image to docker registry?
You always need to tag your images first with a tag containing repository information. Then you can push them to your private registry. Please refer also to this blogpost.
Related
As of now, I am learning Docker. This reference has mentioned two ways of pulling an image from the Docker registry. Can anyone explain this in simple terms?
Does this mean that we cannot get updates on a pulled image if we use docker image pull command?
They are the same command. From the documentation you linked:
To download a particular image, or set of images (i.e., a repository), use docker image pull (or the docker pull shorthand).
There are many "shortand commands" like:
docker push for docker image push
docker run for docker container run
...
What is the difference between docker pull and docker image pull commands?
None.
Can anyone explain this in simple terms?
They are the same.
Does this mean that we cannot get updates on a pulled image if we use docker image pull command?
No.
Also https://forums.docker.com/t/docker-pull-imagename-vs-docker-image-pull-imagename/59283
Can we push different multiple images to same docker hub repository?
For example:
I have 2 images Mysql and ubuntu and only one repository name is demo.
I want to push mysql and ubuntu image to demo repository.
How can we achieve this?
consider to do it in this way (works on my side):
docker image tag your_image_name:version your_account_name_dockerhub/image_name:version
docker image push your_account_name_dockerhub/image_name:version
for example:
docker image tag nginx:latest myname/nginx:latest
docker image push myname/nginx:latest
The current process I have for tagging an image in the same registry is below:
docker pull image:1
docker tag image:1 image:2
docker push image:2
Is there a way for this to be done without having to pull down the image before tagging. Would be "seamless" if I was able to refer to an image, tag and push to the reg in less steps.
According a Docker guy in this post from Docker forums, it's not possible. Also:
If the layers already exist and you docker push with a different tag
Docker will figure out there is nothing to push and report Layer
already exists for those layers.
I have some private Docker registry: http://some-registry-somewhere.com:5000.
When I need to run my compose configuration, I need to pull a target image.
$ docker pull some-registry-somewhere.com:5000/target/image:tag1
In docker-compose.yml file, I have to set the same full URL-path because there is pulled image some-registry-somewhere.com:5000/target/image:tag1.
To have an image with image name only we may tag it:
$ docker tag some-registry-somewhere.com:5000/target/image:tag1 target/image:tag1
But is there any way to automatically cut Docker registry URL through Docker?
There is no such way, because of API specification. The image name is not just the tag, it also identifies for docker engine, which registry should be used for pushes and pulls of this image.
While the first some-registry-somewhere.com:5000/target/image:tag1 is image target/image:tag1 which is located in some-registry-somewhere.com:5000.
The second one target/image:tag1 is, in other words, image, docker.io/target/image:tag1, which is located in official repository.
In fact, they can be different in most of the cases.
The one way, which is not good, actually, because can be confusing (see again about repositories), is to use &&:
docker pull some-registry-somewhere.com:5000/target/image:tag1 && docker tag some-registry-somewhere.com:5000/target/image:tag1 target/image:tag1
I am trying to pull an image from a Docker registry. I have gone to
http://1.1.1.1/v2/_catalog
And I get a list of all the repos. Then I go to
http://1.1.1.1/v2/repo1/tags/list
And I get a list of all the tags
But what I dont know is when Im trying to pull the image, how do I reference this repo/tag?
I've tried:
docker pull http://1.1.1.1/v2/repo1
docker pull http://1.1.1.1/v2/repo1/tags/latest
I've tried googling it and I just cant find an answer. Im really not sure why. Can anyone assist?
Try this:
docker pull 1.1.1.1/repo1:latest
The command format is:
docker pull <host>:<port>/<repoName>:<repoTag>
If you are pulling image from docker hub, docker client will add the default IP and port of docker hub for you, so you don't need to specific the IP address. But for a private registry, you need to tell docker client where is your image located.