dbawiki

• ZFS Appliance scripting
  

Make sure to be in the root context before running this.

script
       run('shares');
       projects = list();

       printf('%-40s %-10s %-10s\
', 'SHARE', 'USED', 'AVAILABLE');

       for (i = 0; i < projects.length; i++) {
               run('select ' + projects[[i]]);
               shares = list();

               for (j = 0; j < shares.length; j++) {
                       run('select ' + shares[[j]]);

                       share = projects[[i]] + '/' + shares[[j]];
                       used = run('get space_data').split(/\\s+/)[[3]];
                       avail = run('get space_available').split(/\\s+/)[[3]];

                       printf('%-40s %-10s %-10s\
', share, used, avail);
                       run('cd ..');
               }

               run('cd ..');
       }
.

and the same information but “machine readable” sizes

script
fmt = '%-40s %-15s %-15s\
';
printf(fmt, 'SHARE', 'USED', 'AVAILABLE');
run('cd /');
run('shares');
pools = choices('pool');
for (p = 0; p < pools.length; p++) {
        set('pool', pools[[p]]);
        projects = list();
        for (i = 0; i < projects.length; i++) {
                run('select ' + projects[[i]]);
                shares = list();
                for (j = 0; j < shares.length; j++) {
                        run('select ' + shares[[j]]);
                        share = pools[[p]] + ':' + projects[[i]] + '/' + shares[[j]];
                        printf(fmt, share, get('space_data'),
                            get('space_available'));
                        run('cd ..');
                }
                run('cd ..');
        }
}
.

[[sudo]] zfs create datapool mirror /dev/sdc /dev/sdd
[[sudo]] zfs list

[[sudo]] zfs create datapool/scripts -o mountpoint=/scripts

sudo zfs list -r datapool

[[sudo]] zfs snapshot datapool/scripts@snap1
[[sudo]] zfs list -t snapshot

[[sudo]] zfs destroy datapool/scripts@snap1
[[sudo]] zfs list -t snapshot

[[sudo]] echo "hello" >/scripts/test1.txt
[[sudo]] cat /scripts/test1.txt
[[sudo]] zfs snapshot datapool/scripts@before
[[sudo]] zfs list -t snapshot

[[sudo]] echo "goodbee" >/scripts/test1.txt
[[sudo]] cat /scripts/test1.txt
=== Rollback to previous snapshot and see original file contents ===
<code>
[[sudo]] zfs list -t snapshot
[[sudo]] zfs rollback datapool/scripts@before
[[sudo]] cat /scripts/test1.txt
[[sudo]] zfs list -t snapshot

[[sudo]] zfs rename datapool/scripts@before datapool/scripts@after
[[sudo]] zfs list -t snapshot

[[sudo]] zfs destroy datapool/scripts
[[sudo]] zfs list -r datapool

If there are snapshots of the filesystem, add -r to force the destruction

[[sudo]] zfs destroy -r datapool/scripts
[[sudo]] zfs list -t snapshot

Clones can only be created from a snapshot.
Snapshots cannot be deleted unless the clone is deleted.
Clone the snapshot datapool/scripts@before

[[sudo]] zfs clone datapool/scripts@before datapool/clone1
zfs list
ls /datapool/clone1

[[sudo]] zfs destroy datapool/scripts@before

[[sudo]] zfs destroy datapool/clone1

[[sudo]] zfs destroy datapool/scripts@before