ZFS on Linux: Setting up NFS on Ubuntu 14.04

Question

I upgraded my headless server from 13.10 to 14.04, but borked the upgrade (and stupidly didn't have a backup image - lesson learnt). Hence, I'm reinstalling everything from scratch. I have a working zpool set up with several datasets, and am trying to get NFS set up to access it across my network from my Macbook. Previously, I had it working by specifying shares in /etc/exports, but I no longer have a copy of that file and cannot remember the options I specified.

I've tried following the process in http://bit.ly/1hgArRk, but # showmount -e results in no mounts shown. zfs get sharenfs returns

NAME                  PROPERTY  VALUE                        SOURCE
data/music_lossless   sharenfs  [email protected]/24,insecure  local

When instead I specify in /etc/exports

/mnt/data/music_lossless        192.168.0.0/24(rw,async,no_root_squash,no_subtree_check,crossmnt)

From # showmount -e I get /mnt/data/music_lossless 192.168.0.0/24, but cannot connect from my Macbook.

$ rpcinfo -p 192.168.0.126 on the Macbook confirms nfs is visible:

100003    2   tcp   2049  nfs
100003    3   tcp   2049  nfs
100003    4   tcp   2049  nfs
100227    2   tcp   2049
100227    3   tcp   2049
100003    2   udp   2049  nfs
100003    3   udp   2049  nfs
100003    4   udp   2049  nfs
100227    2   udp   2049
100227    3   udp   2049

Can anyone see immediately what's going wrong, or give me hints as to how I resolve this?

Answer 1

To restore the exports use zfs share -a. This will happen at boot if you set ZFS_SHARE="yes" in /etc/default/zfs.

Your manual setup looks okay, but you did not make it clear if your data/music_lossless zfs is actually mounted on /mnt/data/music_lossless.