It sounds like this breaks all Docker installs that use userns-remap? Are they really shipping a breaking change with no fix? In addition to bloating the disk? In addition to breaking all old systems that relied on mapping /var/lib/docker?
I can't believe Docker finally shit the bed. Time to replace Docker with Podman.... sigh
The page is documenting current compatibility. No users are automatically migrated to an incompatible setup. If you used userns-remap then you should currently still be using the previous Docker storage stack.
> If you upgraded from an earlier version, your daemon continues using the legacy graph drivers (overlay2) until you enable the containerd image store.