nfs.conf - general configuration for NFS daemons and tools
This file contains site-specific configuration for various NFS daemons and other
processes. Most configuration can also be passed to processes via command line
arguments, but it can be more convenient to have a central file. In
particular, this encourages consistent configuration across different
processes.
When command line options are provided, they override values set
in this file. When this file does not specify a particular parameter, and no
command line option is provided, each tool provides its own default
values.
The file format supports multiple sections, each of which can
contain multiple value assignments. A section is introduced by a line
containing the section name enclosed in square brackets, so
[global]
would introduce a section called global. A value assignment is a single
line that has the name of the value, an equals sign, and a setting for the
value, so
threads = 4
would set the value named threads in the current section to 4.
Leading and trailing spaces and tab are ignored, as are spaces and tabs
surrounding the equals sign. Single and double quotes surrounding the assigned
value are also removed. If the resulting string is empty, the whole assignment
is ignored.
Any line starting with “#” or
“;” is ignored, as is any blank line.
If the assigned value started with a “$” then
the remainder is treated as a name and looked for in the section
[environment] or in the processes environment (see
environ(7)). The value found is used for this value.
The value name include is special. If a section
contains
include = /some/file/name
then the named file will be read, and any value assignments found there-in will
be added to the current section. If the file contains section headers, then
new sections will be created just as if the included file appeared in place of
the include line. If the file name starts with a hyphen then that is
stripped off before the file is opened, and if file doesn't exist no warning
is given. Normally a non-existent include file generates a warning.
Lookup of section and value names is case-insensitive.
Where a Boolean value is expected, any of true, t,
yes, y, on, or 1 can be used for
"true", while false, f, no, n,
off, or 0 can be used for "false". Comparisons are
case-insensitive.
The following sections are known to various programs, and can contain the given
named values. Most sections can also contain a debug value, which can
be one or more from the list general, call, auth,
parse, all. When a list is given, the members should be
comma-separated.
- general
- Recognized values: pipefs-directory.
See blkmapd(8), rpc.idmapd(8), and
rpc.gssd(8) for details.
- exports
- Recognized values: rootdir.
Setting rootdir to a valid path causes the nfs server
to act as if the supplied path is being prefixed to all the exported
entries. For instance, if rootdir=/my/root, and there is an entry
in /etc/exports for /filesystem, then the client will be able to
mount the path as /filesystem, but on the server, this will
resolve to the path /my/root/filesystem.
- exportd
- Recognized values: threads, cache-use-upaddr, ttl,
state-directory-path
See exportd(8) for details.
Note that setting "debug = auth" for
exportd is equivalent to providing the --log-auth
option.
- nfsdcltrack
- Recognized values: storagedir.
The nfsdcltrack program is run directly by the Linux
kernel and there is no opportunity to provide command line arguments, so
the configuration file is the only way to configure this program. See
nfsdcltrack(8) for details.
- nfsd
- Recognized values: threads, host, port,
grace-time, lease-time, udp, tcp,
vers2, vers3, vers4, vers4.0, vers4.1,
vers4.2, rdma,
Version and protocol values are Boolean values as described
above, and are also used by rpc.mountd. Threads and the two times
are integers. port and rdma are service names or numbers.
See rpc.nfsd(8) for details.
- mountd
- Recognized values: manage-gids, descriptors, port,
threads, reverse-lookup, cache-use-upaddr,
ttl, state-directory-path, ha-callout.
These, together with the protocol and version values in the
[nfsd] section, are used to configure mountd. See
rpc.mountd(8) for details.
Note that setting "debug = auth" for
mountd is equivalent to providing the --log-auth
option.
The state-directory-path value in the [mountd]
section is also used by exportfs(8).
- statd
- Recognized values: port, outgoing-port, name,
state-directory-path, ha-callout.
See rpc.statd(8) for details.
- lockd
- Recognized values: port and udp-port.
See rpc.statd(8) for details.
- sm-notify
- Recognized values: retry-time, outgoing-port, and
outgoing-addr.
See sm-notify(8) for details.
- gssd
- Recognized values: verbosity, rpc-verbosity,
use-memcache, use-machine-creds, use-gss-proxy,
avoid-dns, limit-to-legacy-enctypes, context-timeout,
rpc-timeout, keytab-file, cred-cache-directory,
preferred-realm, set-home.
See rpc.gssd(8) for details.
- svcgssd
- Recognized values: principal.
See rpc.svcgssd(8) for details.
- exportfs
- Only debug= is recognized.
- /etc/nfs.conf
- Default NFS client configuration file
- /etc/nfs.conf.d
- When this directory exists and files ending with ".conf" exist,
those files will be used to set configuration variables. These files will
override variables set in /etc/nfs.conf
nfsdcltrack(8), rpc.nfsd(8), rpc.mountd(8),
nfsmount.conf(5).