datatracker.ietf.org
Sign in
Version 5.6.2.p2, 2014-07-24
Report a bug

Using DNS SRV to Specify a Global File Namespace with NFS Version 4
RFC 6641

Internet Engineering Task Force (IETF)                       C. Everhart
Request for Comments: 6641                                    W. Adamson
Category: Standards Track                                         NetApp
ISSN: 2070-1721                                                 J. Zhang
                                                                  Google
                                                               June 2012

  Using DNS SRV to Specify a Global File Namespace with NFS Version 4

Abstract

   The NFS version 4 (NFSv4) protocol provides a mechanism for a
   collection of NFS file servers to collaborate in providing an
   organization-wide file namespace.  The DNS SRV Resource Record (RR)
   allows a simple way for an organization to publish the root of its
   file system namespace, even to clients that might not be intimately
   associated with such an organization.  The DNS SRV RR can be used to
   join these organization-wide file namespaces together to allow
   construction of a global, uniform NFS file namespace.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc6641.

Everhart, et al.             Standards Track                    [Page 1]
RFC 6641           NFSv4 Global Namespace with DNS SRV         June 2012

Copyright Notice

   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
   outside the IETF Standards Process, and derivative works of it may
   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Table of Contents

   1. Background ......................................................3
   2. Requirements Notation ...........................................3
   3. Use of the SRV Resource Record in DNS ...........................3
   4. Integration with Use of NFS Version 4 ...........................5
      4.1. Globally Useful Names: Conventional Mount Point ............5
      4.2. Mount Options ..............................................6
      4.3. File System Integration Issues .............................6
      4.4. Multicast DNS ..............................................7
   5. Where Is This Integration Carried Out? ..........................7
   6. Security Considerations .........................................7
   7. IANA Considerations .............................................9
   8. References ......................................................9
      8.1. Normative References .......................................9
      8.2. Informative References ....................................10

Everhart, et al.             Standards Track                    [Page 2]
RFC 6641           NFSv4 Global Namespace with DNS SRV         June 2012

1.  Background

   Version 4 of the NFS protocol [RFC3530] introduced the fs_locations
   attribute.  Use of this attribute was elaborated further in the NFSv4
   minor version 1 protocol [RFC5661], which also defined an extended
   version of the attribute as fs_locations_info.  With the advent of
   these attributes, NFS servers can cooperate to build a file namespace
   that crosses server boundaries.  The fs_locations and

[include full document text]