Export rootfs or tmpfs

Question

Is it possible to export (for nfs mounting) tmpfs or rootfs directories? I have many linux nodes which are booted into a ram based filesystem with just rootfs and tmpfs. I want each node to see some files in the other nodes, so I am trying to export some directory and trying to mount on another node. I see the following error in /var/log/messages of the nfs server - rpc.mountd: getfh failed: No such file or directory

I have read that one cannot export tmpfs. Is the same true for rootfs? What options do I have?

Answer 1

This isn't a programming question and really belongs somewhere else (like serverfault.com as soon as Jeff throws the switch), but googling "linux nfs root" turns up the following which should help you get started.

Answer 2

rootfs is ramfs or tmpfs, depending on kernel version and configuration.

ramfs can't be exported over NFS. However, exporting tmpfs over NFS works for me, and should: it's been in mainline for years. 91828a405ae454a9503c41a7744f6ff877a80714.