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Today, I would like to share with you what are the relevant knowledge points about Docker data storage methods. The content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article.

The following figure shows the difference between volumes,bind mounts and tmpfs mounts storage technologies:

Usage scenarios of volumes

Share data among multiple containers.

There is no guarantee that the docker host must have a specified folder or directory structure, and volumes can be used to shield these host differences.

When you want to store data on a remote host or cloud provider.

When you want to back up, restore, or migrate data from one docker host to another docker host, volumes is a better choice.

Usage scenarios of bind mounts

Share configuration files between hosts and containers. For example, save the configuration file of the nginx container on the host. After mounting it through bind mounts, you do not have to enter the container to modify the configuration of the nginx.

Share code or build output between the host and the container. For example, mount the target directory of a host project to the container, so that you can maven build the latest product on the host machine, which can be run directly in the container without generating a new image.

The file or directory structure on the docker host is determined

Usage scenarios of tmpfs mounts

When you do not want to persist data to a container or host for security or other reasons, you can use tmpfs mounts mode.

Differences in behavior between bind mounts and volumes

If you mount an empty volume to a non-empty container directory, the files in that container directory will be copied to volume, that is, the original files in the container directory will not be overwritten by volume.

If you use bind mounts to mount a host directory to the container directory, the original files in the container directory will be hidden so that you can only read the files in the host directory.

These are all the contents of the article "what are the ways to store Docker data?" Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.

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