NFS and DNS alias Post: 302551505

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Top Forums UNIX for Advanced & Expert Users NFS and DNS alias Post 302551505 by vostrushka on Tuesday 30th of August 2011 04:20:15 PM

08-30-2011

Registered User

NFS and DNS alias

I have an old NetApp filer that exports volumes via NFS for my UNIX hosts.
We want to migrate it to the new filer and keep name of the old one as DNS alias to the new filer name with new IP address.
The question is will UNIX NFS client that still pointing to the old filer name be able to mount the volume from the physically new filer? Cashed MAC addresses discussion aside, please. I understand that.
Or to show it in the example

Code:

# nslookup filer2 
Name:    filer2
Address:  1.1.1.1
Aliases:  filer1

# nslookup 1.1.1.1
Name:    filer2
Address:  1.1.1.1

On the UNIX client:

Code:

mount filer1:/example /mnt

Will this last command work or it will end up with error message "permission denied", because of the mismatch between used alias and reverse DNS?
Some links to the theory of this process will also be welcomed.

Best regards
Leonid

Last edited by vbe; 08-31-2011 at 04:44 AM.. Reason: Please use code tags when required (code and data) thanks

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LEARN ABOUT FREEBSD

showmount

SHOWMOUNT(8)						    BSD System Manager's Manual 					      SHOWMOUNT(8)

NAME

     showmount -- show remote nfs mounts on host

SYNOPSIS

     showmount [-a | -d] [-e] [-1] [-3] [host]

DESCRIPTION

     The showmount utility shows status information about the NFS server on host.  By default it prints the names of all hosts that have NFS file
     systems mounted on the host.  See NFS: Network File System Protocol Specification, RFC 1094, Appendix A, and NFS: Network File System Version
     3 Protocol Specification, Appendix I, for a detailed description of the protocol.

     The following options are available:

     -a      List all mount points in the form:
		   host:dirpath.

     -d      List directory paths of mount points instead of hosts.

     -e      Show the host's exports list.

     -1      Use mount protocol Version 1, compatible with legacy servers.

     -3      Ignored for backwards compatibility.

SEE ALSO

     mount(8), mount_nfs(8), mountd(8)

HISTORY

     The showmount utility first appeared in 4.4BSD.

BUGS

     The mount daemon running on the server only has an idea of the actual mounts, since the NFS server is stateless.  The showmount utility will
     only display the information as accurately as the mount daemon reports it.

BSD
								  August 16, 2014							       BSD