| 2010-06-01 23:02:39 |
dezibelz |
description |
Binary package hint: autofs
We use cascading mounts to reduce the number of NFS mounts. Consider the following situation: When a user accesses /home/<username>, all homes exported on our file server should be mounted at /net/user (via NFS) if it didn't happen earlier. After that, the directory /net/user/<username> should be bind to /home/<username> (via a local bind mount). This cascading automount configuration could look as follows (In reality, we use autofs5-ldap and LDAP maps, but I checked with the following configuration as well):
Contents of auto.master:
/- auto.direct
/home auto.home
Contents of auto.direct:
/net/user -rw fileserver:/home/user
Contents of auto.home:
* -rw :/net/user/&
Expected behavior: As described above.
Observed behavior: Bind mounts failed with the package autofs5_5.0.4-3.1ubuntu5_i386 in lucid because the NFS mount was not executed beforehand (the debug logs tell about a non-existing special device).
However, everything works as expected if using the compile option
DISABLE_MOUNT_LOCKING
and building an adapted deb package.
$ automount -V
Linux automount version 5.0.4
Directories:
config dir: /etc/default
maps dir: /etc
modules dir: /usr/lib/autofs
Compile options:
DISABLE_MOUNT_LOCKING ENABLE_FORCED_SHUTDOWN ENABLE_IGNORE_BUSY_MOUNTS
WITH_HESIOD WITH_LDAP WITH_SASL LIBXML2_WORKAROUND
$ lsb_release -rd
Description: Ubuntu 10.04 LTS
Release: 10.04 |
Binary package hint: autofs
We use cascading mounts to reduce the number of NFS mounts. Consider the following situation: When a user accesses /home/<username>, all homes exported on our file server should be mounted at /net/user (via NFS) if it didn't happen earlier. After that, the directory /net/user/<username> should be bind to /home/<username> (via a local bind mount). This cascading automount configuration could look as follows (In reality, we use autofs5-ldap and LDAP maps, but I checked with the following configuration as well):
Contents of auto.master:
/- auto.direct
/home auto.home
Contents of auto.direct:
/net/user -rw fileserver:/home/user
Contents of auto.home:
* -rw :/net/user/&
Expected behavior: As described above.
Observed behavior: Bind mounts fails with the package autofs5_5.0.4-3.1ubuntu5_i386 in lucid because the NFS mount is not executed beforehand (the debug logs tell about a non-existing special device).
However, everything works as expected if using the compile option
DISABLE_MOUNT_LOCKING
and building adapted autofs5 packages.
This is the resulting automount:
$ automount -V
Linux automount version 5.0.4
Directories:
config dir: /etc/default
maps dir: /etc
modules dir: /usr/lib/autofs
Compile options:
DISABLE_MOUNT_LOCKING ENABLE_FORCED_SHUTDOWN ENABLE_IGNORE_BUSY_MOUNTS
WITH_HESIOD WITH_LDAP WITH_SASL LIBXML2_WORKAROUND
$ lsb_release -rd
Description: Ubuntu 10.04 LTS
Release: 10.04
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