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Legacy plugins expect host-relative paths (such as for Volume.Mount). However, a containerized plugin cannot respond with a host-relative path. Therefore, this commit modifies new volume plugins' paths in Mount and List to prepend the container's rootfs path. This introduces a new PropagatedMount field in the Plugin Config. When it is set for volume plugins, RootfsPropagation is set to rshared and the path specified by PropagatedMount is bind-mounted with rshared prior to launching the container. This is so that the daemon code can access the paths returned by the plugin from the host mount namespace. Signed-off-by: Tibor Vass <tibor@docker.com> |
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getter.go |