![]() There’s less chance of data being accidentally modified and no dependency on a particular folder structure. Because they’re managed by Docker, you don’t need to manually maintain directories on your host. Volumes are a better solution when you’re providing permanent storage to operational containers. For example: bind mounting your working directory into a container automatically synchronizes your source code files, allowing you to immediately test changes without rebuilding your Docker image. They’re convenient in development workflows. Any changes made to the directory will be reflected on both sides of the mount, whether the modification originates from the host or within the container.īind mounts are best used for ad-hoc storage on a short-term basis. They directly mount a host directory into your container. Docker Volumesīind mounts are another way to give containers access to files and folders on your host. Third-party plugins can add extra storage options too. Local storage on your Docker host is the default, but NFS volumes, CIFS/Samba shares, and device-level block storage adapters are available as alternatives. Several different drivers are available to store volume data in different services. Volumes work with both Linux and Windows containers. The written data will still be available if the container stops – as the volume’s stored separately on your host, it can be remounted to another container or accessed directly using manual tools. When containers write to a path beneath a volume mount point, the changes will be applied to the volume instead of the container’s writable image layer. Volumes are mounted to filesystem paths in your containers. ![]() ![]() ![]() All volumes are managed by Docker and stored in a dedicated directory on your host, usually /var/lib/docker/volumes for Linux systems. Volumes are a mechanism for storing data outside containers. ![]()
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