docker error not supported as upperdir failed to start daemon: error initializing graphdriver: driver not supported
Nov 15 17:00:49 rttbox kernel: overlayfs: filesystem on '/var/lib/docker/overlay2/check-overlayfs-support450709549/upper' not supported as upperdir
Nov 15 17:00:49 rttbox dockerd[93755]: failed to start daemon: error initializing graphdriver: driver not supported
The above error is often/normally caused because you are trying to run docker out of an unsuitable directory/filesystem. For example if you try to place docker's data inside an existing overlayfs2 location, then you will get this error. You cannot put another overlayfs2 layer from docker over top of an already existing overlayfs2.
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docker, supported, upperdir, daemon, initializing, graphdriver, nov, rttbox, kernel, overlayfs, filesystem, var, lib, overlay, dockerd, unsuitable, directory, existing, layer,