[Bug 607039] Re: NFS4 automount using replicated servers doesn't work

[Stefan Bader]

I am not sure whether mount.nfs4 ever did load the right module. At least it does not do it back to Lucid and I have not checked farther back. It may be that nfs once was built in and thus avoided all the issues. The modprobe call happens in mount. Which takes the fstype as the module to load. So I think the way forward is either /etc/modprobe.d alias definition or having the module itself declare that alias. I'll try to suggest the latter but I am not sure how acceptable that is upstream.
The alias is simpler, but question would be which package this should go into.

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https://bugs.launchpad.net/bugs/607039

Title:
  NFS4 automount using replicated servers doesn't work

Status in “autofs5” package in Ubuntu:
  Fix Released
Status in “nfs-utils” package in Ubuntu:
  New

Bug description:
  Binary package hint: autofs5

  [ updated description: mount -t nfs4 server:/mnt /mnt fails through
  oneiric with -ENODEV from mount.nfs4 ]

  In lucid, using autofs5 version 5.0.4-3.1ubuntu5, we are having
  trouble using failover with NFS.  Autofs allows you to specify
  multiple hosts with weighting in its configuration files and will fall
  back to a secondary host if the first host is not available at mount
  time.  However, currently on our systems, the mount fails completely.
  This functionality does work with our RHEL 5 hosts (which use autofs
  5.0.1).  Automounting from a single host does work, but when we supply
  multiple hosts, an strace shows that it's trying to connect to the IP
  address '0.0.0.0', port 0, rather than any of the hosts we specify.

  I have attached the full strace output, our /etc/auto.master file, and
  the relevant file from /etc/autofs.d including the multiple hosts.

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