The kind-mount-root extraMount entry used kind's default propagation
(None), so new bind mounts under the root on the host (e.g. zvols
mounted under /srv/kind) were not visible inside the kind node until
restart. Setting propagation to HostToContainer makes host-side mount
changes propagate into the kind node automatically.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>