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Diffstat (limited to '')
-rw-r--r-- | Documentation/admin-guide/nfs/nfs-client.rst | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/Documentation/admin-guide/nfs/nfs-client.rst b/Documentation/admin-guide/nfs/nfs-client.rst index c4b777c7584b..36760685dd34 100644 --- a/Documentation/admin-guide/nfs/nfs-client.rst +++ b/Documentation/admin-guide/nfs/nfs-client.rst @@ -36,10 +36,9 @@ administrative requirements that require particular behavior that does not work well as part of an nfs_client_id4 string. The nfs.nfs4_unique_id boot parameter specifies a unique string that can be -used instead of a system's node name when an NFS client identifies itself to -a server. Thus, if the system's node name is not unique, or it changes, its -nfs.nfs4_unique_id stays the same, preventing collision with other clients -or loss of state during NFS reboot recovery or transparent state migration. +used together with a system's node name when an NFS client identifies itself to +a server. Thus, if the system's node name is not unique, its +nfs.nfs4_unique_id can help prevent collisions with other clients. The nfs.nfs4_unique_id string is typically a UUID, though it can contain anything that is believed to be unique across all NFS clients. An @@ -53,8 +52,12 @@ outstanding NFSv4 state has expired, to prevent loss of NFSv4 state. This string can be stored in an NFS client's grub.conf, or it can be provided via a net boot facility such as PXE. It may also be specified as an nfs.ko -module parameter. Specifying a uniquifier string is not support for NFS -clients running in containers. +module parameter. + +This uniquifier string will be the same for all NFS clients running in +containers unless it is overridden by a value written to +/sys/fs/nfs/net/nfs_client/identifier which will be local to the network +namespace of the process which writes. The DNS resolver @@ -65,8 +68,8 @@ migrated onto another server by means of the special "fs_locations" attribute. See `RFC3530 Section 6: Filesystem Migration and Replication`_ and `Implementation Guide for Referrals in NFSv4`_. -.. _RFC3530 Section 6\: Filesystem Migration and Replication: http://tools.ietf.org/html/rfc3530#section-6 -.. _Implementation Guide for Referrals in NFSv4: http://tools.ietf.org/html/draft-ietf-nfsv4-referrals-00 +.. _RFC3530 Section 6\: Filesystem Migration and Replication: https://tools.ietf.org/html/rfc3530#section-6 +.. _Implementation Guide for Referrals in NFSv4: https://tools.ietf.org/html/draft-ietf-nfsv4-referrals-00 The fs_locations information can take the form of either an ip address and a path, or a DNS hostname and a path. The latter requires the NFS client to |