Taula de continguts

NFS

información

http://es.tldp.org/Manuales-LuCAS/GARL2/garl2/x-087-2-nfs.html
mount -t nfs nfs_volume local_dir options (se puede omitir -t nfs pq el formato de montaje es exclusivo de este protocolo)
- mount -t nfs vlager:/home /users
cat /proc/filesystems → ha de aparecer «nfs»

puesta en marcha de server/client

server :

configuración servicio:

sudo apt-get install nfs-kernel-server nfs-common portmap
sudo vim /etc/exports # añadir el recurso, con parámetros y restricciones (según más abajo)
sudo exportfs -ra
sudo service nfs-kernel-server start
# altertativamente: sudo systemctl restart nfs-kernel-server
showmount -e

configuración directorio compartido:

mkdir /path/directorio/compartido
chown nobody:nogroup /path/directorio/compartido

client :

sudo apt-get install nfs-common
sudo /etc/hosts # añadir, opcionalmente, la IP de la máquina remota y su "alias"
sudo mount -t nfs <ip>:<ruta> <ruta_local>

/etc/fstab

<ip_NFS_server:/path/directorio/compartido /punto/montaje nfs rw,async,hard,intr,noexec 0 0

flags:
- rw: Read/write filesystem.
- ro: Read-only filesystem. Remote NFS clients can’t modify the filesystem.
- hard: Applications using files stored on an NFS will always wait if the server goes down. User cannot terminate the process unless the option intr is set.
- soft: Applications using files stored on an NFS will wait a specified time (using the timeo option) if the server goes down, and after that, will throw an error.
- intr: Allows user interruption of processes waiting on a NFS request.
- timeo=<num>: For use with the soft option. Specify the timeout for an NFS request.
- nolock: Disable file locks. Useful with older NFS servers.
- noexec: Disable execution of binaries or scripts on an NFS share.
- nosuid: Prevents users from gaining ownership of files on the NFS share.
- rsize=<num>: Sets the read block data size. Defaults to 8192 on NFSv2 and NFSv3, and 32768 on NFSv4.
- wsize=<num>: Sets the write block data size. Defaults to 8192 on NFSv2 and NFSv3, and 32768 on NFSv4.

/etc/exports

/etc/exports

/path/directorio/compartir [<ip> | <rango_ip>]/<mascara>(flags)

flags:
- rw : lectura-escritura
- ro : solo lectura
- root_squash : impide que un cliente remoto con permiso ROOT pueda ejercerlos
- subtree_check : Disable file location checks on partial volume exports. This option will speed up transfers on full volume exports.
- sync : Force all transfers to operate in synchronous mode, so all clients will wait until their operations are really done. This can avoid data corruption in the event of a server crash.

apuntes

quien puede montar (/etc/exports) :

/etc/exports/

/carpeta ip/mask (ro,root_squad) @ trusted (rw,no_root_squad)

AUTOFS daemon
- /etc/auto.master

Taula de continguts

NFS

información

puesta en marcha de server/client

/etc/exports

apuntes

+ info