управлять точками монтирования autofs (manage autofs mount points)
Имя (Name)
automount - manage autofs mount points
Синопсис (Synopsis)
automount [options] [master_map]
Описание (Description)
The automount program is used to manage mount points for autofs,
the inlined Linux automounter. automount works by reading the
auto.master(5) map and sets up mount points for each entry in the
master map allowing them to be automatically mounted when
accessed. The file systems are then automatically umounted after
a period of inactivity.
Параметры (Options)
-h, --help
Print brief help on program usage.
-p, --pid-file
Write the pid of the daemon to the specified file.
-t <seconds>, --timeout <seconds>
Set the global minimum timeout, in seconds, until
directories are unmounted. The default is 10 minutes.
Setting the timeout to zero disables umounts completely.
The internal program default is 10 minutes, but the
default installed configuration overrides this and sets
the timeout to 5 minutes to be consistent with earlier
autofs releases.
-M <seconds>, --master-wait <seconds>
Set the maximum time to wait for the master map to become
available if it cannot be read at program start.
-n <seconds>, --negative-timeout <seconds>
Set the default timeout for caching failed key lookups.
The default is 60 seconds.
-v, --verbose
Enables logging of general status and progress messages
for all autofs managed mounts.
-d, --debug
Enables logging of general status and progress messages as
well as debugging messages for all autofs managed mounts.
-Dvariable=value, --define variable=value
Define a global macro substitution variable. Global
definitions are over-ridden macro definitions of the same
name specified in mount entries.
-S, --systemd-service
Used when running the automounter as a systemd service to
ensure log entry format is consistent with the log entry
format when running as a daemon.
-f, --foreground
Run the daemon in the foreground and log to stderr instead
of syslog."
-r, --random-multimount-selection
Enables the use of random selection when choosing a host
from a list of replicated servers.
-m, --dumpmaps [<map type> <map name>]
With no parameters, list information about the configured
automounter maps, then exit.
If the dumpmaps option is given and is followed by two
parameters, "<map type> <map name>" then simple "<key,
value>" pairs that would be read in by a map read are
printed to stdout if the given map type and map name are
found in the map configuration.
If the map is an LDAP map and there is more than one map
of same name in different base dns only the first map
encountered by autofs will be listed. Similarly, if the
map is a file map and there is more than one map of the
same name in different directories, only the first map
encountered will be listed.
If the map type is an old style multi-map and any one of
the map names in the multi-map entry matches the given map
name the entries that would be used by autofs for the
whole multi-map will be listed.
-O, --global-options
Allows the specification of global mount options used for
all master map entries. These options will either replace
or be appended to options given in a master map entry
depending on the APPEND_OPTIONS configuration setting.
-V, --version
Display the version number, then exit.
-l, --set-log-priority priority path [path,...]
Set the daemon log priority to the specified value. Valid
values include the numbers 0-7, or the strings emerg,
alert, crit, err, warning, notice, info, or debug. Log
level debug will log everything, log levels info, warn (or
warning), or notice with enable the daemon verbose
logging. Any other level will set basic logging. Note that
enabling debug or verbose logging in the autofs global
configuration will override dynamic log level changes. For
example, if verbose logging is set in the configuration
then attempting to set logging to basic logging, by using
alert, crit, err or emerg won't stop the verbose logging.
However, setting logging to debug will lead to everything
(debug logging) being logged witch can then also be
disabled, returning the daemon to verbose logging. This
option can be specified to change the logging priority of
an already running automount process.
The path argument corresponds to the automounted path name
as specified in the master map.
-C, --dont-check-daemon
Don't check if the daemon is currently running (see
NOTES).
-F, --force
Force an unlink umount of existing mounts under configured
autofs managed mount points during startup. This can cause
problems for processes with working directories within
these mounts (see NOTES).
-U, --force-exit
Force an unlink umount of existing mounts under configured
autofs managed mount points and exit rather than
continuing the startup. This can cause problems for
processes with working directories within these mounts
(see NOTES).
Аргументы (Arguments)
automount takes one optional argument, the name of the master map
to use.
master_map
Location for autofs master map that defines autofs managed
mount points and the mount maps they will use. The default
is auto.master.
Примечание (Note)
If the automount daemon catches a USR1 signal, it will umount all
currently unused autofs managed mounted file systems and continue
running (forced expire). If it catches the TERM signal it will
umount all unused autofs managed mounted file systems and exit if
there are no remaining busy file systems. If autofs has been
compiled with the option to ignore busy mounts on exit it will
exit leaving any busy mounts in place otherwise busy file systems
will not be umounted and autofs will not exit. Alternatively, if
autofs has been compiled with the option to enable forced
shutdown then a USR2 signal to the daemon will cause all mounts
to be umounted and any busy mounts to be forcibly umounted,
including autofs mount point directories (summary execution).
Note that the forced umount is an unlink operation and the actual
umount will not happen in the kernel until active file handles
are released. The daemon also responds to a HUP signal which
triggers an update of the maps for each mount point.
If any autofs mount point directories are busy when the daemon is
sent an exit signal the daemon will not exit. The exception to
this is if autofs has been built with configure options to either
ignore busy mounts at exit or force umount at exit. If the ignore
busy mounts at exit option is used the filesystems will be left
in a catatonic (non-functional) state and can be manually
umounted when they become unused. If the force umount at exit
option is used the filesystems will be umounted but the mount
will not be released by the kernel until they are no longer in
use by the processes that held them busy. If automount managed
filesystems are found mounted when autofs is started they will be
recovered unless they are no longer present in the map in which
case they need to umounted manually.
If the option to disable the check to see if the daemon is
already running is used be aware that autofs currently may not
function correctly for certain types of automount maps. The
mounts of the separate daemons might interfere with one another.
The implications of running multiple daemon instances needs to be
checked and tested before we can say this is supported.
If the option to force an unlink of mounts at startup is used
then processes whose working directory is within unlinked
automounted directories will not get the correct pwd from the
system. This is because, after the mount is unlinked from the
mount tree, anything that needs to walk back up the mount tree to
construct a path, such as getcwd(2) and the proc filesystem
/proc/<pid>/cwd, cannot work because the point from which the
path is constructed has been detached from the mount tree.
Смотри также (See also)
autofs(5), autofs(8), autofs.conf(5), auto.master(5), mount(8),
autofs_ldap_auth.conf(5).
Ошибки (баги) (Bugs)
Don't know, I've fixed everything I know about.
The documentation could be better.
Please report other bugs along with a detailed description to
<autofs@vger.kernel.org>. Visit
http://vger.kernel.org/vger-lists.html#autofs for information
about the list.
