Locating Image Storage on a Separate Partition
The default storage location for Docker container images is /var/lib/docker. Because this is part of the root file system, you might find it useful to mount it on a separate partition, both to avoid running out of storage quickly and to protect against file system corruption. Both Docker and the OS might have trouble recovering when the above problems emerge. For example, SUSE states: “It is recommended to have /var/lib/docker mounted on a separate partition or volume to not affect the Docker host operating system in case of file system corruption.”
A good approach is to set the Docker Engine storage setting to this alternative volume partition. For example, on Fedora-based distributions, edit the Docker daemon configuration file (see Configure and troubleshoot the Docker daemonOpens in a new tab in the Docker documentation), locate the ExecStart= command line option for the Docker Engine, and add - as an argument.
