How to move Docker containers between different hosts?
I cannot find a way of moving docker running containers from one host to another.
Is there any way I can push my containers to repositories like we do for images ? Currently, I am not using data volumes to store the data associated with applications running inside containers. So some data resides inside containers, which I want to persist before redesigning the setup.
You cannot move a running docker container from one host to another.
You can commit the changes in your container to an image with
docker commit, move the image onto a new host, and then start a new container with
docker run. This will preserve any data that your application has created inside the container.
Nb: It does not preserve data that is stored inside volumes; you need to move data volumes manually to new host.
5 ways to move Docker container to another host, Since Docker containers are little boxes of software, it can be easily copied and moved from computer to computer. Here we show you how to You cannot move a running docker container from one host to another. You can commit the changes in your container to an image with docker commit, move the image onto a new host, and then start a new container with docker run. This will preserve any data that your application has created inside the container.
Alternatively, if you do not wish to push to a repository:
Export the container to a tarball
docker export <CONTAINER ID> > /home/export.tar
Move your tarball to new machine
Import it back
cat /home/export.tar | docker import - some-name:latest
How to Copy/Move a Docker Container to Another Host, during commit to preserve data-consistency. Commit my_container as an image called my_container_snapshot , and tag it yymmdd . The most commonly used method to move Docker container to another host, is by migrating the image linked to that container. For the container that has to be moved, first its Docker image is saved into a compressed file using ‘docker commit’ command. docker commit container-id image-name . The image that is generated is compressed and moved into the new host machine. In the new host, a new container is created with ‘docker run’.
What eventually worked for me, after lot's of confusing manuals and confusing tutorials, since Docker is obviously at time of my writing at peek of inflated expectations, is:
- Save the docker image into archive:
docker save image_name > image_name.tar
- copy on another machine
- on that other docker machine, run docker load in a following way:
cat image_name.tar | docker load
Export and import, as proposed in another answers does not export ports and variables, which might be required for your container to run. And you might end up with stuff like "No command specified" etc... When you try to load it on another machine.
So, difference between save and export is that save command saves whole image with history and metadata, while export command exports only files structure (without history or metadata).
Needless to say is that, if you already have those ports taken on the docker hyper-visor you are doing import, by some other docker container, you will end-up in conflict, and you will have to reconfigure exposed ports.
Some docker examples · GitHub, How do I push Docker images from one registry to another? It may be that you worked on a Docker instance on your local computer and decided to move it to a more powerful server. Or maybe you just want to deploy your customized container on multiple computers, “copy and paste” it around. Other times you may be dissatisfied with a cloud-computing provider and want to switch to a different one.
From Docker documentation:
docker exportdoes not export the contents of volumes associated with the container. If a volume is mounted on top of an existing directory in the container,
docker exportwill export the contents of the underlying directory, not the contents of the volume. Refer to Backup, restore, or migrate data volumes in the user guide for examples on exporting data in a volume.
Other external tools: In order to move a container with its associated data volume you can use Flocker https://clusterhq.com/flocker/introduction/
How to move Docker containers from one host to another?, I want to move one or more of the docker containers from one host to another. One way that i could do it, without using the docker save Using the export and import feature of Docker is one of the easiest ways to move a container from host to host.Enjoy moving your containers around! Note: The docker export command does not export the contents of volumes associated with the container. If a volume is mounted on top of an existing directory in the container, docker export will export the contents of the underlying directory, not the contents of the volume.
Use this script: https://github.com/ricardobranco777/docker-volumes.sh
This does preserve data in volumes.
# Stop the container docker stop $CONTAINER # Create a new image docker commit $CONTAINER $CONTAINER # Save image docker save -o $CONTAINER.tar $CONTAINER # Save the volumes (use ".tar.gz" if you want compression) docker-volumes.sh $CONTAINER save $CONTAINER-volumes.tar # Copy image and volumes to another host scp $CONTAINER.tar $CONTAINER-volumes.tar $USER@$HOST: # On the other host: docker load -i $CONTAINER.tar docker create --name $CONTAINER [<PREVIOUS CONTAINER OPTIONS>] $CONTAINER # Load the volumes docker-volumes.sh $CONTAINER load $CONTAINER-volumes.tar # Start container docker start $CONTAINER
Moving a Docker container to another machine, Dear All, Here my scenario is moving a running docker container to another machine, I created an image which is Oracle database. Here the 4.9 Moving Data Between Docker Containers and the Host. You can use the -v option of docker run to copy volume data between a data volume container and the host. For example, you might want to back up the data so that you can restore it to the same data volume container or to copy it to a different data volume container.
Migrate Docker container to new server, There are many ways of migrating Docker containers to a different server, servers and a way to transfer images between the two servers (scp, In this blog post, I’ll show you how to Import and Export a Windows Container Image from one Container Host to another using the docker command line. Moving Container Images from one Container host to another Is one of the most important tasks you will need to know In order to manage Windows Containers.
Move Docker Image to Another Host, Learn how to move Docker Images from Host to Host as well as from Repo to Repo in our Giant Swarm Blog about moving docker containers Use Docker Compose. Docker Compose provides a way to orchestrate multiple containers that work together. Examples include a service that processes requests and a front-end web site, or a service that uses a supporting function such as a Redis cache.
The Essential Guide To Moving Docker Containers, Docker provides various commands/methods for moving containers. to move your Docker containers between your hosts and repositories. Export vs. Save. Docker supports two different types of methods for saving container images to a single tarball: docker export - saves a container’s running or paused instance to a file. docker save - saves a non-running container image to a file.