AMZFS-SNAPSHOT(8) System Administration Commands AMZFS-SNAPSHOT(8)

NAME amzfs-snapshot - Amanda script to create zfs snapshot

DESCRIPTION amzfs-snapshot is an Amanda script implementing the Script API. It should not be run by users directly. It create a zfs snapshot of the filesystem where the path specified is mounted.

PRE-DLE-* create a snapshot and the POST_DLE_* destroy the snapshot, *-DLE-AMCHECK, *-DLE-ESTIMATE and *-DLE-BACKUP must be set to be executed on the client:

execute-on pre-dle-amcheck, post-dle-amcheck, pre-dle-estimate, post-dle-estimate, pre-dle-backup, post-dle-backup execute-where client

The PRE_DLE_* script output a DIRECTORY property telling where the directory is located in the snapshot. The application must be able to use the DIRECTORY property, amgtar can do it.

The script is run as the amanda user, it must have the priviledge to create and destroy snapshot:

zfs allow -ldu AMANDA_USER mount,snapshot,destroy FILESYSTEM

Some system doesn´t have "zfs allow", but you can give the Amanda backup user the rights to manipulate ZFS filesystems by using the following command:

usermod -P "ZFS File System Management,ZFS Storage Management" AMANDA_USER This will require that your run zfs under pfexec, set the PFEXEC property to YES.

The format of the DLE must be one of:

Desciption Example ---------- ------- Mountpoint /data Arbitrary mounted dir /data/interesting_dir ZFS pool name datapool ZFS filesystem datapool/database ZFS logical volume datapool/dbvol

The filesystem must be mounted.

PROPERTIES This section lists the properties that control amzfs-snapshot´s functionality. See amanda-scripts(7) for information on the Script API, script configuration.

DF-PATH

Path to the ´df´ binary, search in $PATH by default.

ZFS-PATH

Path to the ´zfs´ binary, search in $PATH by default.

PFEXEC-PATH

Path to the ´pfexec´ binary, search in $PATH by default.

PFEXEC

If "NO" (the default), pfexec is not used, if set to "YES" then pfexec is used.

EXAMPLE In this example, a dumptype is defined to use amzfs-snapshot script to create a snapshot and use amgtar to backup the snapshot. define script-tool amzfs_snapshot { comment "backup of zfs snapshot" plugin "amzfs-snapshot" execute-on pre-dle-amcheck, post-dle-amcheck, pre-dle-estimate, post-dle-estimate, pre-dle-backup, post-dle-backup execute-where client #property "DF-PATH" "/usr/sbin/df" #property "ZFS-PATH" "/usr/sbin/zfs" #property "PFEXEC-PATH" "/usr/sbin/pfexec" #property "PFEXEC" "NO" }

define dumptype user-zfs-amgtar { dt_amgtar script "amzfs_snapshot" }

SEE ALSO amanda.conf(5), amanda-client.conf(5), amanda-scripts(7)

AUTHORS Jean-Louis Martineau <martineau@zmanda.com> Zmanda, Inc. (http://www.zmanda.com)

Dustin J. Mitchell <dustin@zmanda.com> Zmanda, Inc. (http://www.zmanda.com)

Amanda 2.6.1p2 11/05/2009 AMZFS-SNAPSHOT(8)