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librenms-librenms/includes/polling/applications/zfs.inc.php
Zane C. Bowers-Hadley 3190bdb8b2 add ZFS L2 support (#15095) 
* add alerts for ZFS

* add initial l2 bits to the poller for zfs

* more minor tweaks to the ZFS poller

* more zfs bits

* add new ZFS graphs

* begin adding L2 stuff

* add linux_zfs-v3 bits

* update zfs app page

* style fix

* update the data for the zfs legacy test

* test update for zfs v1

* fix some zfs tests

* more zfs v3 test cleanup

* another zfs v3 test data fix

* more zfs v3 test data cleanup

* more test tweaks
2023-06-11 16:32:28 +02:00

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<?php
use LibreNMS\Exceptions\JsonAppException;
use LibreNMS\Exceptions\JsonAppMissingKeysException;
use LibreNMS\RRD\RrdDefinition;
$name = 'zfs';
// Is set to false later if missing keys are found.
$not_legacy = 1;
try {
$zfs = json_app_get($device, $name, 1)['data'];
} catch (JsonAppMissingKeysException $e) {
//old version with out the data key
$zfs = $e->getParsedJson();
} catch (JsonAppException $e) {
echo PHP_EOL . $name . ':' . $e->getCode() . ':' . $e->getMessage() . PHP_EOL;
update_application($app, $e->getCode() . ':' . $e->getMessage(), []); // Set empty metrics and error message
return;
}
$rrd_name = ['app', $name, $app->app_id];
$rrd_def = RrdDefinition::make()
->addDataset('deleted', 'DERIVE', 0)
->addDataset('evict_skip', 'DERIVE', 0)
->addDataset('mutex_skip', 'DERIVE', 0)
->addDataset('recycle_miss', 'DERIVE', 0)
->addDataset('arc_size', 'GAUGE', 0)
->addDataset('target_size_max', 'GAUGE', 0)
->addDataset('target_size_min', 'GAUGE', 0)
->addDataset('target_size', 'GAUGE', 0)
->addDataset('target_size_per', 'GAUGE', 0)
->addDataset('arc_size_per', 'GAUGE', 0)
->addDataset('target_size_arat', 'GAUGE', 0)
->addDataset('min_size_per', 'GAUGE', 0)
->addDataset('mfu_size', 'GAUGE', 0)
->addDataset('p', 'GAUGE', 0)
->addDataset('rec_used_per', 'GAUGE', 0)
->addDataset('freq_used_per', 'GAUGE', 0)
->addDataset('arc_hits', 'DERIVE', 0)
->addDataset('arc_misses', 'DERIVE', 0)
->addDataset('demand_data_hits', 'DERIVE', 0)
->addDataset('demand_data_misses', 'DERIVE', 0)
->addDataset('demand_meta_hits', 'DERIVE', 0)
->addDataset('demand_meta_misses', 'DERIVE', 0)
->addDataset('mfu_ghost_hits', 'DERIVE', 0)
->addDataset('mfu_hits', 'DERIVE', 0)
->addDataset('mru_ghost_hits', 'DERIVE', 0)
->addDataset('mru_hits', 'DERIVE', 0)
->addDataset('pre_data_hits', 'DERIVE', 0)
->addDataset('pre_data_misses', 'DERIVE', 0)
->addDataset('pre_meta_hits', 'DERIVE', 0)
->addDataset('pre_meta_misses', 'DERIVE', 0)
->addDataset('anon_hits', 'DERIVE', 0)
->addDataset('arc_accesses_total', 'DERIVE', 0)
->addDataset('demand_data_total', 'DERIVE', 0)
->addDataset('pre_data_total', 'DERIVE', 0)
->addDataset('real_hits', 'DERIVE', 0)
->addDataset('cache_hits_per', 'GAUGE', 0)
->addDataset('cache_miss_per', 'GAUGE', 0)
->addDataset('actual_hit_per', 'GAUGE', 0)
->addDataset('data_demand_per', 'GAUGE', 0)
->addDataset('data_pre_per', 'GAUGE', 0)
->addDataset('anon_hits_per', 'GAUGE', 0)
->addDataset('mru_per', 'GAUGE', 0)
->addDataset('mfu_per', 'GAUGE', 0)
->addDataset('mru_ghost_per', 'GAUGE', 0)
->addDataset('mfu_ghost_per', 'GAUGE', 0)
->addDataset('demand_hits_per', 'GAUGE', 0)
->addDataset('pre_hits_per', 'GAUGE', 0)
->addDataset('meta_hits_per', 'GAUGE', 0)
->addDataset('pre_meta_hits_per', 'GAUGE', 0)
->addDataset('demand_misses_per', 'GAUGE', 0)
->addDataset('pre_misses_per', 'GAUGE', 0)
->addDataset('meta_misses_per', 'GAUGE', 0)
->addDataset('pre_meta_misses_per', 'GAUGE', 0);
$fields = [
'deleted' => $zfs['deleted'],
'evict_skip' => $zfs['evict_skip'],
'mutex_skip' => $zfs['mutex_skip'],
'recycle_miss' => $zfs['recycle_miss'],
'arc_size' => $zfs['arc_size'],
'target_size_max' => $zfs['target_size_max'],
'target_size_min' => $zfs['target_size_min'],
'target_size' => $zfs['target_size'],
'target_size_per' => $zfs['target_size_per'],
'arc_size_per' => $zfs['arc_size_per'],
'target_size_arat' => $zfs['target_size_arat'],
'min_size_per' => $zfs['min_size_per'],
'mfu_size' => $zfs['mfu_size'],
'p' => $zfs['p'],
'rec_used_per' => $zfs['rec_used_per'],
'freq_used_per' => $zfs['freq_used_per'],
'arc_hits' => $zfs['arc_hits'],
'arc_misses' => $zfs['arc_misses'],
'demand_data_hits' => $zfs['demand_data_hits'],
'demand_data_misses' => $zfs['demand_data_misses'],
'demand_meta_hits' => $zfs['demand_meta_hits'],
'demand_meta_misses' => $zfs['demand_meta_misses'],
'mfu_ghost_hits' => $zfs['mfu_ghost_hits'],
'mfu_hits' => $zfs['mfu_hits'],
'mru_ghost_hits' => $zfs['mru_ghost_hits'],
'mru_hits' => $zfs['mru_hits'],
'pre_data_hits' => $zfs['pre_data_hits'],
'pre_data_misses' => $zfs['pre_data_misses'],
'pre_meta_hits' => $zfs['pre_meta_hits'],
'pre_meta_misses' => $zfs['pre_meta_misses'],
'anon_hits' => $zfs['anon_hits'],
'arc_accesses_total' => $zfs['arc_accesses_total'],
'demand_data_total' => $zfs['demand_data_total'],
'pre_data_total' => $zfs['pre_data_total'],
'real_hits' => $zfs['real_hits'],
'cache_hits_per' => $zfs['cache_hits_per'],
'cache_miss_per' => $zfs['cache_miss_per'],
'actual_hit_per' => $zfs['actual_hit_per'],
'data_demand_per' => $zfs['data_demand_per'],
'data_pre_per' => $zfs['data_pre_per'],
'anon_hits_per' => $zfs['anon_hits_per'],
'mru_per' => $zfs['mru_per'],
'mfu_per' => $zfs['mfu_per'],
'mru_ghost_per' => $zfs['mru_ghost_per'],
'mfu_ghost_per' => $zfs['mfu_ghost_per'],
'demand_hits_per' => $zfs['demand_hits_per'],
'pre_hits_per' => $zfs['pre_hits_per'],
'meta_hits_per' => $zfs['meta_hits_per'],
'pre_meta_hits_per' => $zfs['pre_meta_hits_per'],
'demand_misses_per' => $zfs['demand_misses_per'],
'pre_misses_per' => $zfs['pre_misses_per'],
'meta_misses_per' => $zfs['meta_misses_per'],
'pre_meta_misses_per' => $zfs['pre_meta_misses_per'],
];
$tags = ['name' => $name, 'app_id' => $app->app_id, 'rrd_def' => $rrd_def, 'rrd_name' => $rrd_name];
data_update($device, 'app', $tags, $fields);
// name choosen based on this is the second group of variables
$rrd_name = ['app', $name, $app->app_id, '_____group2'];
$rrd_def = RrdDefinition::make()
->addDataset('l2_abort_lowmem', 'DERIVE', 0)
->addDataset('l2_access_total', 'DERIVE', 0)
->addDataset('l2_asize', 'GAUGE', 0)
->addDataset('l2_bufc_d_asize', 'GAUGE', 0)
->addDataset('l2_bufc_m_asize', 'GAUGE', 0)
->addDataset('l2_cksum_bad', 'DERIVE', 0)
->addDataset('l2_d_to_m_ratio', 'GAUGE', 0)
->addDataset('l2_errors', 'DERIVE', 0)
->addDataset('l2_evict_l1cached', 'DERIVE', 0)
->addDataset('l2_evict_l_retry', 'DERIVE', 0)
->addDataset('l2_evict_reading', 'DERIVE', 0)
->addDataset('l2_feeds', 'DERIVE', 0)
->addDataset('l2_free_on_write', 'DERIVE', 0)
->addDataset('l2_hdr_size', 'GAUGE', 0)
->addDataset('l2_hits', 'DERIVE', 0)
->addDataset('l2_io_error', 'DERIVE', 0)
->addDataset('l2_log_blk_asize', 'GAUGE', 0)
->addDataset('l2_log_blk_avg_as', 'DERIVE', 0)
->addDataset('l2_log_blk_count', 'DERIVE', 0)
->addDataset('l2_log_blk_writes', 'DERIVE', 0)
->addDataset('l2_mfu_asize', 'GAUGE', 0)
->addDataset('l2_misses', 'DERIVE', 0)
->addDataset('l2_mru_asize', 'GAUGE', 0)
->addDataset('l2_prefetch_asize', 'GAUGE', 0)
->addDataset('l2_read_bytes', 'DERIVE', 0)
->addDataset('l2_rb_asize', 'GAUGE', 0)
->addDataset('l2_rb_bufs', 'DERIVE', 0)
->addDataset('l2_rb_bufs_prec', 'DERIVE', 0)
->addDataset('l2_rb_csum_lb_err', 'DERIVE', 0)
->addDataset('l2_rb_dh_err', 'DERIVE', 0)
->addDataset('l2_rb_io_errors', 'DERIVE', 0)
->addDataset('l2_rb_log_blks', 'DERIVE', 0)
->addDataset('l2_rb_lowmem', 'DERIVE', 0)
->addDataset('l2_rb_size', 'GAUGE', 0)
->addDataset('l2_rb_success', 'DERIVE', 0)
->addDataset('l2_rb_unsup', 'DERIVE', 0)
->addDataset('l2_rw_clash', 'DERIVE', 0)
->addDataset('l2_size', 'GAUGE', 0)
->addDataset('l2_write_bytes', 'DERIVE', 0)
->addDataset('l2_writes_done', 'DERIVE', 0)
->addDataset('l2_writes_error', 'DERIVE', 0)
->addDataset('l2_writes_l_retry', 'DERIVE', 0)
->addDataset('l2_writes_sent', 'DERIVE', 0);
$fields = [
'l2_abort_lowmem' => $zfs['l2_abort_lowmem'],
'l2_access_total' => $zfs['l2_access_total'],
'l2_asize' => $zfs['l2_asize'],
'l2_bufc_d_asize' => $zfs['l2_bufc_data_asize'],
'l2_bufc_m_asize' => $zfs['l2_bufc_metadata_asize'],
'l2_cksum_bad' => $zfs['l2_cksum_bad'],
'l2_d_to_m_ratio' => $zfs['l2_data_to_meta_ratio'],
'l2_errors' => $zfs['l2_errors'],
'l2_evict_l1cached' => $zfs['l2_evict_l1cached'],
'l2_evict_l_retry' => $zfs['l2_evict_lock_retry'],
'l2_evict_reading' => $zfs['l2_evict_reading'],
'l2_feeds' => $zfs['l2_feeds'],
'l2_free_on_write' => $zfs['l2_free_on_write'],
'l2_hdr_size' => $zfs['l2_hdr_size'],
'l2_hits' => $zfs['l2_hits'],
'l2_io_error' => $zfs['l2_io_error'],
'l2_log_blk_asize' => $zfs['l2_log_blk_asize'],
'l2_log_blk_avg_as' => $zfs['l2_log_blk_avg_asize'],
'l2_log_blk_count' => $zfs['l2_log_blk_count'],
'l2_log_blk_writes' => $zfs['l2_log_blk_writes'],
'l2_mfu_asize' => $zfs['l2_mfu_asize'],
'l2_misses' => $zfs['l2_misses'],
'l2_mru_asize' => $zfs['l2_mru_asize'],
'l2_prefetch_asize' => $zfs['l2_prefetch_asize'],
'l2_read_bytes' => $zfs['l2_read_bytes'],
'l2_rb_asize' => $zfs['l2_rebuild_asize'],
'l2_rb_bufs' => $zfs['l2_rebuild_bufs'],
'l2_rb_bufs_prec' => $zfs['l2_rebuild_bufs_precached'],
'l2_rb_csum_lb_err' => $zfs['l2_rebuild_cksum_lb_errors'],
'l2_rb_dh_err' => $zfs['l2_rebuild_dh_errors'],
'l2_rb_io_errors' => $zfs['l2_rebuild_io_errors'],
'l2_rb_log_blks' => $zfs['l2_rebuild_log_blks'],
'l2_rb_lowmem' => $zfs['l2_rebuild_lowmem'],
'l2_rb_size' => $zfs['l2_rebuild_size'],
'l2_rb_success' => $zfs['l2_rebuild_success'],
'l2_rb_unsup' => $zfs['l2_rebuild_unsupported'],
'l2_rw_clash' => $zfs['l2_rw_clash'],
'l2_size' => $zfs['l2_size'],
'l2_write_bytes' => $zfs['l2_write_bytes'],
'l2_writes_done' => $zfs['l2_writes_done'],
'l2_writes_error' => $zfs['l2_writes_error'],
'l2_writes_l_retry' => $zfs['l2_writes_lock_retry'],
'l2_writes_sent' => $zfs['l2_writes_sent'],
];
$tags = ['name' => $name, 'app_id' => $app->app_id, 'rrd_def' => $rrd_def, 'rrd_name' => $rrd_name];
data_update($device, 'app', $tags, $fields);
//
// process additional info returned
//
$pools = [];
$pool_rrd_def = RrdDefinition::make()
->addDataset('size', 'GAUGE', 0)
->addDataset('alloc', 'GAUGE', 0)
->addDataset('free', 'GAUGE', 0)
->addDataset('expandsz', 'GAUGE', 0)
->addDataset('frag', 'GAUGE', 0)
->addDataset('cap', 'GAUGE', 0)
->addDataset('dedup', 'GAUGE', 0);
$metrics = $zfs; // copy $zfs data to $metrics
unset($metrics['pools']); // remove pools it is an array, re-add data below
foreach ($zfs['pools'] as $pool) {
$pools[] = $pool['name'];
$rrd_name = ['app', $name, $app->app_id, $pool['name']];
$fields = [
'alloc' => $pool['alloc'],
'size' => $pool['size'],
'free' => $pool['free'],
'expandsz' => $pool['expandsz'],
'frag' => set_numeric($pool['frag'], -1),
'cap' => $pool['cap'],
'dedup' => $pool['dedup'],
];
$tags = ['name' => $name, 'app_id' => $app->app_id, 'rrd_def' => $pool_rrd_def, 'rrd_name' => $rrd_name];
data_update($device, 'app', $tags, $fields);
// insert flattened pool metrics into the metrics array
foreach ($fields as $field => $value) {
$metrics['pool_' . $pool['name'] . '_' . $field] = $value;
}
}
// gets the pool health status
$old_health = $app->data['health'] ?? 1;
if (isset($zfs['health'])) {
$health = $zfs['health'];
if ($old_health != $zfs['health']) {
if ($zfs['health'] == 1) {
log_event('ZFS pool(s) now healthy', $device, 'application', 1);
} else {
log_event('ZFS pool(s) DEGRADED, FAULTED, UNAVAIL, REMOVED, or unknown', $device, 'application', 5);
}
}
} else {
$health = 1;
}
// gets the l2 error status
$old_l2_errors = $app->data['l2_errors'] ?? 0;
if (isset($zfs['l2_errors'])) {
if ($old_l2_errors != $zfs['l2_errors']) {
log_event('ZFS L2 cache has experienced errors', $device, 'application', 5);
}
}
// check for added or removed pools
$old_pools = $app->data['pools'] ?? [];
$added_pools = array_diff($pools, $old_pools);
$removed_pools = array_diff($old_pools, $pools);
// if we have any source pools, save and log
if (count($added_pools) > 0 || count($removed_pools) > 0) {
$log_message = 'ZFS Pool Change:';
$log_message .= count($added_pools) > 0 ? ' Added ' . implode(',', $added_pools) : '';
$log_message .= count($removed_pools) > 0 ? ' Removed ' . implode(',', $added_pools) : '';
log_event($log_message, $device, 'application');
}
$app->data = ['pools' => $pools, 'health' => $health, 'l2_errors' => $zfs['l2_errors']];
update_application($app, 'OK', $metrics);
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