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

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

ZFS-PATH

PFEXEC-PATH

PFEXEC

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>

Dustin J. Mitchell <dustin@zmanda.com>