When to enable fuse-overlayfs

Use the fuse-overlayfs storage driver for Podman and Buildah in the Universal Developer Image (UDI) instead of the default vfs driver, which does not provide copy-on-write support.

This page is for platform administrators who enable fuse-overlayfs cluster-wide, and for developers who want to enable it for individual workspaces.

To enable fuse-overlayfs for workspaces for OpenShift versions older than 4.15, the administrator must first enable /dev/fuse access on the cluster.

Note:

This is not necessary for OpenShift versions 4.15 and later, since the /dev/fuse device is available by default.

After enabling /dev/fuse access, fuse-overlayfs can be enabled in two ways:

  1. For all user workspaces within the cluster.
  2. For workspaces belonging to certain users.

For instructions on enabling /dev/fuse access and configuring fuse-overlayfs for your workspaces, see Additional resources.