However, this is not often discussed, probably because larger organizations set up their own repositories, where they can customize their own images and distribute across their servers as they see fit.

But you shouldnt have to go through the trouble of setting up your own line of distribution if you occasionally need to move one or more containers around.

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.

Whatever the situation, theres a rather simple procedure to do this which will be detail below.

You will take a snapshot of the data in your Docker instance.

If its running while you do this, theres a small chance some files might end up being incomplete in your snapshot.

When 250MB has been uploaded, you issue the docker commit command.

The upload then continues, but when you restore this Docker image on another host, only 250MB out of the 500MB might be available.

Processes running inside the container might also save their own data or make other changes.

To preserve all of this, you can commit this new state to a new image.

If you added a lot of data to your container, this operation will take a longer time to complete.

If this is a problem, you can avoid this pause by entering docker commit -pfalse NAMEOFINSTANCE mycontainerimage instead of the next command.

The odds of creating an image with inconsistentincomplete data increase in this case.

If you do so, remember to replace it in all subsequent commands where you encounter it.

The only difference now is that you will use mycontainerimage at the end instead of whatever image you used in the past.

You can save, compress, transfer, uncompress and load the image on the destination host in one command.

After running the docker commit command discussed in the first section, you can use this.

But remember, if you do this often, you might want to set up your own private repository instead.

Docker For Mac Access Other Containers