I built a docker image like this:
sudo docker image build -t docker_image_gotk3 .
If I execute
sudo docker images I can see the line:
REPOSITORY TAG IMAGE ID CREATED SIZE
docker_image_gotk3 latest c13f7fcdb11d 14 minutes ago 20.4MB
I searched the complete file system and I didn't find a single file named docker_image_gotk3. How do I actually get it?
You have to export the docker image to push GitHub.
docker save -o docker_image_gotk3.tar docker_image_gotk3
ls -sh docker_image_gotk3.tar
20.4M docker_image_gotk3.tar
Github doesn't appear to have a Docker registry service as of now.
Maybe you could try tracking your image in Docker Hub as an alternative to what Tibi02 proposes?
Just create an account at https://hub.docker.com/ if you don't have one already, and do the following:
docker login in your terminal to authenticate in Docker Hub
docker image push your_username/docker_image_gotk3:latest to upload your image to the registry
Then you should be able to see it at https://cloud.docker.com/repository/docker/you_username/docker_image_gotk3, and download your image with docker image pull your_username/docker_image_gotk3:latest
Hope this helps!
Related
I am new to docker, I was wondering how can I share my docker image with others without posting it on docker hub or any thing?
Is there any way to share image with others and later they can build the same image and run the dockerised application in their pc?
some solutions
you can give the source code and the dockerfile to someone, he will be able to build the image himself.
you can build it yourself , host the image on a private registry. really easy : https://docs.docker.com/registry/deploying/
use "docker save" to export an image as a tar file and later "docker load" it.
https://docs.docker.com/engine/reference/commandline/save/
You can use
$docker export <container_name> <tar_filename.tar>
Share the tar file
The person with whom the tar file has been shared can create container by
$docker import <tar_filename.tar>
Make sure that underlying Docker version is same to avoid unnecessary compatibility problems
I recently started using podman and realized that images pulled via docker doesn't become available for use to podman and vice-versa. For example:-
If I pull the image using docker CLI, as shown below
docker pull registry.access.redhat.com/ubi7-minimal
and If I want to use the same image with podman or buildah, turns out I cannot
[riprasad#localhost ~]$ podman inspect registry.access.redhat.com/ubi7-minimal
Error: error getting image "registry.access.redhat.com/ubi7-minimal": unable to find 'registry.access.redhat.com/ubi7-minimal' in local storage: no such image
I understand that this is because both podman and docker uses a different storage location and hence the image pulled down via docker doesn't becomes available for use with podman and vice-versa.
[riprasad#localhost ~]$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
registry.access.redhat.com/ubi7-minimal latest fc8736ea8c5b 5 weeks ago 81.5MB
[riprasad#localhost ~]$ podman images
REPOSITORY TAG IMAGE ID CREATED SIZE
Is there a way to mitigate this issue, and somehow make docker and podman work inter-changeably on the very same image, irrespective of whether it has been pulled down via docker or podman ??
Docker and Podman do not sure the same storage. They can not, because Docker controls locking to its storage within the daemon. While Podman, Buildah, CRI-O, Skopeo all can share content, because they use the file system.
Podman and the other tools can work with the docker-daemon storage indirectly, via the "docker-daemon" transport.
Something like:
podman run docker-daemon:alpine echo hello
Should work.
Note, that podman is pulling the image out of the docker daemon and is storing the image in containers/storage, and then running the container, it is not using the Docker storage directly.
You can also do
podman push myimage docker-daemon:myimage
To copy an image from containers/storage into the docker daemon.
Adding to #rhatdan's post
podman run docker://alpine echo hello
This worked for me.
For more details: Here->
I used docker ps/docker ps -a/docker ps -n 1 all not showing my first image.
But it after I using docker pull hello-world it saying it installed successfully
docker pull pulls an image (and all the layers that make it up) to your local machine, but doesn't run anything.
docker ps lists containers on your system.
Once you run that container (using docker run hello-world), you'll see it in dokcer ps.
To view the image you pulled, you could use docker images.
As you find from the previous answer docker pull will download the image (mostly from the docker hub) and when trying to pull next time, it finds the image already in your local machine. To see all the images you have locally, use docker image ls.
I need to deploy selenium/standalone-chrome image to docker.
The problem is that I use corporative openshift with private registry. There is no possibility to upload image to registry or load it thru the docker (docker service is not exposed).
I managed to export tar file from local machine using command 'docker save -o'. I uploaded this image to artifactory as an artifact and now can download it.
Question: how can I create or import image based on a binary archive with layers?
Thanks in advance.
Even you're using OpenShift, you can proceed to Docker push since the registry is exposed by default: you need your username (oc whoami) along with the token oc whoami --show-token.
Before proceeding, make sure you have an Image Stream since it's mandatory in order to push images.
Once obtained these data, proceed to login from your host:
docker login -u `oc whoami` -p `oc whoami --show-token` registry.your.openshift.fqdn.tld:443
Now, you just need to build your image
docker build . -t registry.your.openshift.fqdn.tld:443/your-image-stream/image-name:version
Finally, push it!
docker push registry.your.openshift.fqdn.tld:443/your-image-stream/image-name:version
I have 2 hosts running the same docker customized image. I have modified the image on host 1 and saved the image to a custom.tar. If I take that image and load it onto host 2 will it just update or should I remove the old docker image first?
There are 2 ways to do that with repository and without repository using load and save.
With repository below are the steps.
Log in on Docker Hub
Click on Create Repository.
Choose a name and a description for your repository and click
Create.
Log into the Docker Hub from the command line
docker login --username=yourhubusername --email=youremail#company.com
tag your image
docker tag <existing-image> <hub-user>/<repo-name>[:<tag>]
Push your image to the repository you created
docker push <hub-user>/<repo-name>:<tag>
Pull the image to host 2
docker pull <hub-user>/<repo-name>:<tag>
This will add the image to docker hub and available on internet and now you can pull this image to any system.
With this approach you can keep the same images with different tags on system. But if you don't need old images better to delete that to avoid junk.
Without docker hub.
This command will create tar bundle.
docker save [OPTIONS] IMAGE [IMAGE...]
example: docker save busybox > busybox.tar
Load an image from a tar archive or STDIN
docker load [OPTIONS]
example:docker load < busybox.tar.gz
Recommended: Docker hub or DTR approach easy to manage unless you have bandwidth issue in case your file is large.
Refer:
Docker Hub Repositories