AUTOFS -- To automatically mount devices(floppy/cdrom) or nfs mount points
RPM Required : - autofs ( On my box its autofs-5.0.1-0.rc2.102 )
Config Files:
#rpm -qc autofs-5.0.1-0.rc2.102
/etc/auto.master --Master Map for automounter
The auto.master map is consulted to set up automount managed mount points when the autofs(8) script is invoked or the automount(8) program is
run. Each line describes a mount point and refers to an autofs map describing file systems to be mounted under the mount point.
/etc/auto.misc
/etc/auto.net
/etc/auto.smb
/etc/autofs_ldap_auth.conf
/etc/rc.d/init.d/autofs
/etc/sysconfig/autofs
What Does automount means:
An automount daemon mounts and unmounts filesystem when they are accessed as and when required. This minimizes the no of active mount pts and is mostly transparent to users
automount - autofs - /etc/auto.master
==========================================
/usr/sbin/automount* - User-land automounter process or Binary
/etc/auto.master - Master config file
/etc/auto.misc - Later
/etc/rc.d/init.d/autofs - InitScript to start/stop autofs
* automount is a bg process that configures a single mt pt for autofs, the
kernel portion of the Linux automounter
* The startup script /etc/rc.d/init.d/autofs starts the automount* daemon which
parses a master file - /etc/auto.master - and runs the automount* daemon for
each of the listed mounts
It's typical to see a running instance of the automount* daemon for each
automatic mt pt that has been configured in /etc/auto.master
/etc/auto.master
----------------------
* The /etc/auto.master file associates a mount point with a map.
* The map translates the dir name accessed - the key - into a cmd line that
mount* can use to perform the real mount
Format : Consists of 3 fields :
1. The key - Specifies the mount root dir to use for FSs specified in the
map file [next field]
2. The map file - which can be a text file, an exec prg, a NIS or LDAP DB
3. Timeout value used to determine when to unmount the automounted FS
* Eg
/etc/auto.master
----------------
# Mt Pt File to consult options
# --------- --------------- -------
/mnt /etc/auto.misc --timeout 60
/funny /etc/auto.misc --timeout 60
/etc/auto.misc
--------------
Format : Consists of 3 fields :
1. The key - Usually also the name of the subdir that you would access
to cause the device or FS specified in the 3rd field to be
mounted
2. Comma-seperated list of options to pass to the mount prg
3. Device driver/ Target NFS Server
/etc/auto.misc
--------------
floppy -fstype=auto,user :/dev/fd0
cdrom -fstype=iso9660,ro,user :/dev/cdrom
smile nfsserver:/jokes
/|\
Note: |
You could leave this blank or put soft,intr,rsize=8192,wsize=8192 etc
This corresponds to the "-o" options given when mounting a NFS share
on a client from the CLI
Finally do a service autofs restart
service autofs status or ps -el to check
---> If a user accesses the cdrom dir [ by doing cd /mnt/cdrom ], the
automounter will construct a mount cmd and mount the device driver -
/dev/cdrom - on /mnt/cdrom and time out after 60 secs
=================================================
EXAMPLE 1:
-------
---> On nfsserver, set up an NFS server and export /jokes
Do not forget portmap on both places
---> On nfsclient, do this : [ Do not forget to create dirs "/funny/smile"
# cd /funny/smile
# ls
and you will be automounting the nfsserver:/jokes on nfsclient's local
/funny/smile
MO: When you do a /funny/smile, the automount* daemon, which is monitoring
you, will, then, construct a mount command like this :
from from from
/etc/auto.misc auto.master auto.misc
| | |
\|/ \|/ \|/
mount nfsserver:/jokes /funny /smile
So eventually automount will mount nfsserver:/jokes to /funny/smile
=================================================
EXAMPLE 2: Automounting HomeDirs of Users from master nfsserver -- Indirect maps
On nfsserver export /home
On nfsclient
/etc/auto.master
# Mt Pt File to consult options
# --------- --------------- -------
/home /etc/auto.home --timeout=60
/etc/auto.home
#User directory NFSMountOptions Target Server
* -rw,soft,intr,rsize=8192,wsize=8192 nfsserver:/home/&
Explanation:
So when a user foo logs into the system (nfsclient) his home directory /home/foo get automounted from nfsserver:/home/foo with mount options -rw,soft,intr,rsize=8192,wsize=8192
=================================================
EXAMPLE 3: Automounting -- Direct Maps with /
On nfsserver export /data
On nfsclient
/etc/auto.master
# Mt Pt File to consult options
# --------- --------------- -------
/- /etc/auto.direct --timeout=60
/etc/auto.direct
#Mount directory NFSMountOptions Target Server
/data -rw,soft,intr,rsize=8192,wsize=8192 nfsserver:/data
^ Don't forget this front slash ( else it will never work).
Explanation:
So when a user foo cd to /data onto the system (nfsclient) /data get automounted from nfsserver:/data with mount options -rw,soft,intr,rsize=8192,wsize=8192
===============================================
Quick Tips:
1) Make sure portmap and autofs is started on client for autofs to work properly.
RPM Required : - autofs ( On my box its autofs-5.0.1-0.rc2.102 )
Config Files:
#rpm -qc autofs-5.0.1-0.rc2.102
/etc/auto.master --Master Map for automounter
The auto.master map is consulted to set up automount managed mount points when the autofs(8) script is invoked or the automount(8) program is
run. Each line describes a mount point and refers to an autofs map describing file systems to be mounted under the mount point.
/etc/auto.misc
/etc/auto.net
/etc/auto.smb
/etc/autofs_ldap_auth.conf
/etc/rc.d/init.d/autofs
/etc/sysconfig/autofs
What Does automount means:
An automount daemon mounts and unmounts filesystem when they are accessed as and when required. This minimizes the no of active mount pts and is mostly transparent to users
automount - autofs - /etc/auto.master
==========================================
/usr/sbin/automount* - User-land automounter process or Binary
/etc/auto.master - Master config file
/etc/auto.misc - Later
/etc/rc.d/init.d/autofs - InitScript to start/stop autofs
* automount is a bg process that configures a single mt pt for autofs, the
kernel portion of the Linux automounter
* The startup script /etc/rc.d/init.d/autofs starts the automount* daemon which
parses a master file - /etc/auto.master - and runs the automount* daemon for
each of the listed mounts
It's typical to see a running instance of the automount* daemon for each
automatic mt pt that has been configured in /etc/auto.master
/etc/auto.master
----------------------
* The /etc/auto.master file associates a mount point with a map.
* The map translates the dir name accessed - the key - into a cmd line that
mount* can use to perform the real mount
Format : Consists of 3 fields :
1. The key - Specifies the mount root dir to use for FSs specified in the
map file [next field]
2. The map file - which can be a text file, an exec prg, a NIS or LDAP DB
3. Timeout value used to determine when to unmount the automounted FS
* Eg
/etc/auto.master
----------------
# Mt Pt File to consult options
# --------- --------------- -------
/mnt /etc/auto.misc --timeout 60
/funny /etc/auto.misc --timeout 60
/etc/auto.misc
--------------
Format : Consists of 3 fields :
1. The key - Usually also the name of the subdir that you would access
to cause the device or FS specified in the 3rd field to be
mounted
2. Comma-seperated list of options to pass to the mount prg
3. Device driver/ Target NFS Server
/etc/auto.misc
--------------
floppy -fstype=auto,user :/dev/fd0
cdrom -fstype=iso9660,ro,user :/dev/cdrom
smile nfsserver:/jokes
/|\
Note: |
You could leave this blank or put soft,intr,rsize=8192,wsize=8192 etc
This corresponds to the "-o" options given when mounting a NFS share
on a client from the CLI
Finally do a service autofs restart
service autofs status or ps -el to check
---> If a user accesses the cdrom dir [ by doing cd /mnt/cdrom ], the
automounter will construct a mount cmd and mount the device driver -
/dev/cdrom - on /mnt/cdrom and time out after 60 secs
=================================================
EXAMPLE 1:
-------
---> On nfsserver, set up an NFS server and export /jokes
Do not forget portmap on both places
---> On nfsclient, do this : [ Do not forget to create dirs "/funny/smile"
# cd /funny/smile
# ls
and you will be automounting the nfsserver:/jokes on nfsclient's local
/funny/smile
MO: When you do a /funny/smile, the automount* daemon, which is monitoring
you, will, then, construct a mount command like this :
from from from
/etc/auto.misc auto.master auto.misc
| | |
\|/ \|/ \|/
mount nfsserver:/jokes /funny /smile
So eventually automount will mount nfsserver:/jokes to /funny/smile
=================================================
EXAMPLE 2: Automounting HomeDirs of Users from master nfsserver -- Indirect maps
On nfsserver export /home
On nfsclient
/etc/auto.master
# Mt Pt File to consult options
# --------- --------------- -------
/home /etc/auto.home --timeout=60
/etc/auto.home
#User directory NFSMountOptions Target Server
* -rw,soft,intr,rsize=8192,wsize=8192 nfsserver:/home/&
Explanation:
So when a user foo logs into the system (nfsclient) his home directory /home/foo get automounted from nfsserver:/home/foo with mount options -rw,soft,intr,rsize=8192,wsize=8192
=================================================
EXAMPLE 3: Automounting -- Direct Maps with /
On nfsserver export /data
On nfsclient
/etc/auto.master
# Mt Pt File to consult options
# --------- --------------- -------
/- /etc/auto.direct --timeout=60
/etc/auto.direct
#Mount directory NFSMountOptions Target Server
/data -rw,soft,intr,rsize=8192,wsize=8192 nfsserver:/data
^ Don't forget this front slash ( else it will never work).
Explanation:
So when a user foo cd to /data onto the system (nfsclient) /data get automounted from nfsserver:/data with mount options -rw,soft,intr,rsize=8192,wsize=8192
===============================================
Quick Tips:
1) Make sure portmap and autofs is started on client for autofs to work properly.
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