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d6f0b15578
The erofs snapshotter configuration is node-wide (a single containerd drop-in) and cannot be split per runtime handler. The Go runtime does not support fsmerged EROFS — it rejects fsmeta.erofs mount sources with "unsupported mount source" — so erofs is only usable with runtime-rs. Drop qemu-coco-dev (Go) from the erofs CI matrix and add a check in kata-deploy's configure_erofs_snapshotter() that inspects the SNAPSHOTTER_HANDLER_MAPPING: if any Go shim is explicitly mapped to erofs, emit a prominent warning and bail out with a clear error telling the operator to fix the mapping. Since all shims are now guaranteed to be runtime-rs when erofs is active, remove the conditional is_rust_shim gating and always emit the full erofs configuration (differ options, default_size, max_unmerged_layers=1). Signed-off-by: Fabiano Fidêncio <ffidencio@nvidia.com>