ZFS multiple mountpoints

[honza801]

Hi,

is it possible to set multiple mountpoints for one ZFS file system?
For example following config:

# zfs list
NAME               USED  AVAIL  REFER  MOUNTPOINT
zpool              219K  97.9G    32K  /zpool
zpool/jail          63K  97.9G    32K  /jail
zpool/jail/mach1    31K  97.9G    31K  /jail/mach1
zpool/ports         31K  97.9G    31K  /zpool/ports

And I want to mount zpool/ports to /usr/ports and /jail/mach1/usr/ports.

Any hints?
Thanks
Fous

 

[SirDice]

is it possible to set multiple mountpoints for one ZFS file system?

No.

And I want to mount zpool/ports to /usr/ports and /jail/mach1/usr/ports.

Use nullfs(5):

# zfs set mountpoint=/usr/ports zpool/ports
# mount -t nullfs /usr/ports /jail/mach1/usr/ports

Or in fstab:

/usr/ports   /jail/mach1/usr/ports  nullfs  rw      0       0

Make it really funky by adding it to /etc/fstab.mach1 and use:

jail_mach1_mount_enable="YES"

Then it'll be mounted when the jail starts and unmount when it stops.

 

[honza801]

Thanks,

I know about mount_nullfs, but I want ZFS to do it for me.
Is there some other ZFS feature?

 

[gkontos]

Thanks,

I know about mount_nullfs, but I want ZFS to do it for me.
Is there some other ZFS feature?

I think SirDice gave you an exact answer to your question.

If you want to know more about ZFS features have a look at Oracle's documentation:

http://docs.oracle.com/cd/E19963-01/html/821-1448/toc.html

 

[honza801]

True, thanks.