On Mon, 30 May 2011, Mark Saad wrote:
So I am stumped on this one. I want to know what the IP of each
nfs server that is providing each nfs export. I am running 7.4-RELEASE
When I run "mount -t nfs" I see something like this
VIP-01:/export/source on /mnt/src
VIP-02:/export/target on /mnt/target
VIP-01:/export/logs on /mnt/logs
VIP-02:/export/package on /mnt/pkg
The issue is I use a load balanced nfs server , from isilon. So VIP-01 could
be any one of a group of IPs . I am trying to track down a network
congestion issue and I cant find a way to match the output of lsof , and
netstat to the output of mount -t nfs . Does anyone have any ideas how I
could track this down , is there a way to run mount and have it show the IP
and not the name of the source server ?
Unfortunately, there's not a good answer to this question. nfsstat(1) should
have a mode that can iterate down active mount points displaying statistics
and connection information for each, but doesn't. NFS sockets generally don't
appear in sockstat(1) either. However, they should appear in netstat(1), so
you can at least identify the sockets open to various NFS server IP addresses
(especially if they are TCP mounts).
Enhancing nfsstat(1) to display more detailed information would, I think, be a
very useful task for someone to get up to (and perhaps should appear on our
ideas list). Something that would be nice to have, in support of this, is a
way for file systems to provide extended status via a system call that queries
mountpoints, both "portable" information that spans file systems, and file
system-specific data. Morally, similar to nmount(2) but for statistics rather
than setting things. The "easier" route is to add new sysctls that dump
per-mountpoint state directly from NFS, but given how much other information
we'd like to export, it would be great to have a more general mechanism.
(The more adventurous can, with a fairly high degree of safety, use kgdb on
/dev/mem (read-only) to walk the NFS stack's mount tables, but that's not much
fun.)
Robert
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