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Adding systemd application (#14540)

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bnerickson
2022-10-30 12:18:02 -07:00
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parent 437322f8cb
commit d28b1cac3f
11 changed files with 1241 additions and 0 deletions
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35
doc/Extensions/Applications.md
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@@ -2457,6 +2457,41 @@ setup. If the default does not work, check the docs for it at
[MetaCPAN for
suricata_stat_check](https://metacpan.org/dist/Suricata-Monitoring/view/bin/suricata_stat_check)
## Systemd
The systemd application polls systemd and scrapes systemd units' load, activation, and sub states.
### SNMP Extend
1. Copy the python script, systemd.py, to the desired host
```
wget https://github.com/librenms/librenms-agent/raw/master/snmp/systemd.py -O /etc/snmp/systemd.py
```
2. Make the script executable
```
chmod +x /etc/snmp/systemd.py
```
3. Edit your snmpd.conf file and add:
```
extend systemd /etc/snmp/systemd.py
```
4. (Optional) Create a /etc/snmp/systemd.json file and specify:
a.) "systemctl_cmd" - String path to the systemctl binary [Default: "/usr/bin/systemctl"]
b.) "include_inactive_units" - True/False string to include inactive units in results [Default: "False"]
```
{
"systemctl_cmd": "/bin/systemctl",
"include_inactive_units": "True"
}
```
5. Restart snmpd.
## TinyDNS aka djbdns
### Agent

35
includes/html/graphs/application/systemd-common.inc.php Normal file
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@@ -0,0 +1,35 @@
<?php
$name = 'systemd';
$colours = 'psychedelic';
$scale_min = 0;
$polling_type = 'app';
$unit_text = 'Units';
$unitlen = 5;
$bigdescrlen = 20;
$smalldescrlen = 20;
$rrd_list = [];
foreach (array_keys($rrdArray) as $state_type) {
$rrd_filename = Rrd::name($device['hostname'], [
$polling_type,
$name,
$app->app_id,
$state_type,
]);
if (Rrd::checkRrdExists($rrd_filename)) {
$i = 0;
foreach ($rrdArray[$state_type] as $state_status => $state_status_desc) {
$rrd_list[$i]['filename'] = $rrd_filename;
$rrd_list[$i]['descr'] = $state_status_desc['descr'];
$rrd_list[$i]['ds'] = $state_status;
$i++;
}
} else {
d_echo('RRD ' . $rrd_filename . ' not found');
}
}
require 'includes/html/graphs/generic_multi_line_exact_numbers.inc.php';

10
includes/html/graphs/application/systemd_active.inc.php Normal file
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@@ -0,0 +1,10 @@
<?php
require_once 'includes/systemd-shared.inc.php';
$rrdArray = [];
foreach ($systemd_mapper['active'] as $state_status) {
$rrdArray['active'][$state_status] = ['descr' => $state_status];
}
require 'systemd-common.inc.php';

10
includes/html/graphs/application/systemd_load.inc.php Normal file
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@@ -0,0 +1,10 @@
<?php
require_once 'includes/systemd-shared.inc.php';
$rrdArray = [];
foreach ($systemd_mapper['load'] as $state_status) {
$rrdArray['load'][$state_status] = ['descr' => $state_status];
}
require 'systemd-common.inc.php';

21
includes/html/graphs/application/systemd_sub.inc.php Normal file
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@@ -0,0 +1,21 @@
<?php
require_once 'includes/systemd-shared.inc.php';
$rrdArray = [];
// This pulls the service sub state type
// given by the opened page. Otherwise, 'service'
// is the default for the Application overview
// pages.
$sub_state_type = $vars['sub_state_type'] ?? 'service';
$sub_flattened_name = 'sub_' . $sub_state_type;
foreach ($systemd_mapper['sub'][$sub_state_type] as $sub_state_status) {
$rrdArray[$sub_flattened_name][$sub_state_status] = [
'descr' => $sub_state_status,
];
}
require 'systemd-common.inc.php';

5
includes/html/pages/apps.inc.php
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@@ -423,6 +423,11 @@ $graphs['pwrstatd'] = [
'percentage',
'minutes',
];
$graphs['systemd'] = [
'sub',
'active',
'load',
];
echo '<div class="panel panel-default">';
echo '<div class="panel-heading">';

108
includes/html/pages/device/apps/systemd.inc.php Normal file
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@@ -0,0 +1,108 @@
<?php
require_once 'includes/systemd-shared.inc.php';
/**
* Builds the graphs variable
*
* @param string $state_type
* @param associative-array $systemd_mapper
* @param array $state_type_ternary_depth
* @param array $graphs
* @return $graphs
*/
function systemd_graph_builder($state_type, $systemd_mapper, $state_type_ternary_depth, $graphs)
{
$graph_name = 'systemd_' . $state_type;
$graphs[$graph_name]['type'] = $state_type;
if (! in_array($state_type, $state_type_ternary_depth)) {
$graph_descr = ucfirst($state_type . ' State');
$graphs[$graph_name]['desc'] = $graph_descr;
} else {
foreach ($systemd_mapper[$state_type] as $sub_state_type => $sub_state_statuses) {
$graph_descr = ucfirst($state_type) . ' ' . ucfirst($sub_state_type) . ' State';
$graphs[$graph_name]['sub_states'][$sub_state_type]['desc'] = $graph_descr;
}
}
return $graphs;
}
/**
* Builds a graph array and outputs the graph.
*
* @param string $state_type
* @param string $app_id
* @param null|string $sub_state_type
* @param string $graph_desc
*/
function systemd_graph_printer($state_type, $app_id, $sub_state_type, $graph_desc)
{
$graph_type = $state_type;
$graph_array['height'] = '100';
$graph_array['width'] = '215';
$graph_array['to'] = time();
$graph_array['id'] = $app_id;
$graph_array['type'] = 'application_' . $state_type;
if (! is_null($sub_state_type)) {
$graph_array['sub_state_type'] = $sub_state_type;
}
echo '<div class="panel panel-default">
<div class="panel-heading">
<h3 class="panel-title">' .
$graph_desc .
'</h3>
</div>
<div class="panel-body">
<div class="row">';
include 'includes/html/print-graphrow.inc.php';
echo '</div>';
echo '</div>';
echo '</div>';
}
$link_array = [
'page' => 'device',
'device' => $device['device_id'],
'tab' => 'apps',
'app' => 'systemd',
];
print_optionbar_start();
echo generate_link('All Unit States', $link_array) . ' | ';
$i = 0;
foreach ($systemd_mapper as $state_type => $state_statuses) {
echo generate_link(ucfirst($state_type) . ' State', $link_array, ['section' => $state_type]);
if ($i < count($systemd_mapper) - 1) {
echo ', ';
}
$i++;
}
print_optionbar_end();
$graphs = [];
// Build graphs variable
if (isset($vars['section'])) {
// Build graphs for the individual state sections (load, active, or sub).
$graphs = systemd_graph_builder($vars['section'], $systemd_mapper, $state_type_ternary_depth, $graphs);
} else {
// Build graphs for the combined states section (load, active, and sub).
foreach ($systemd_mapper as $state_type => $state_status) {
$graphs = systemd_graph_builder($state_type, $systemd_mapper, $state_type_ternary_depth, $graphs);
}
}
// Display the built graphs
foreach ($graphs as $state_type => $values) {
if (in_array($values['type'], $state_type_ternary_depth)) {
foreach ($values['sub_states'] as $sub_state_type => $text) {
systemd_graph_printer($state_type, $app['app_id'], $sub_state_type, $text['desc']);
}
} else {
systemd_graph_printer($state_type, $app['app_id'], null, $values['desc']);
}
}

119
includes/polling/applications/systemd.inc.php Normal file
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@@ -0,0 +1,119 @@
<?php
require_once 'includes/systemd-shared.inc.php';
use LibreNMS\Exceptions\JsonAppException;
use LibreNMS\Exceptions\JsonAppMissingKeysException;
use LibreNMS\RRD\RrdDefinition;
$name = 'systemd';
$output = 'OK';
$polling_type = 'app';
$metrics = [];
/**
* Performs a data update and returns the updated metrics.
*
* @param string $app_id
* @param class $device
* @param array $fields
* @param array $metrics
* @param string $name
* @param string $polling_type
* @param class $rrd_def
* @param string $state_type
* @return $metrics
*/
function data_update_helper($app_id, $fields, $metrics, $name, $polling_type, $rrd_def, $state_type)
{
global $device;
$rrd_name = [$polling_type, $name, $app_id, $state_type];
$metrics[$state_type] = $fields;
$tags = [
'name' => $name,
'app_id' => $app_id,
'type' => $state_type,
'rrd_def' => $rrd_def,
'rrd_name' => $rrd_name,
];
data_update($device, $polling_type, $tags, $fields);
return $metrics;
}
// Grab systemd json data.
try {
$systemd_data = json_app_get($device, $name, 1)['data'];
} catch (JsonAppMissingKeysException $e) {
$systemd_data = $e->getParsedJson();
} catch (JsonAppException $e) {
echo PHP_EOL . $name . ':' . $e->getCode() . ':' . $e->getMessage() . PHP_EOL;
update_application($app, $e->getCode() . ':' . $e->getMessage(), $metrics);
return;
}
// Use the mapping variable in systemd-shared.inc.php to parse
// the json data received from the systemd.py script.
foreach ($systemd_mapper as $state_type => $state_statuses) {
if (! in_array($state_type, $state_type_ternary_depth)) {
// Process systemd states that do not have three
// levels of depth (load and active)
$rrd_def = RrdDefinition::make();
$fields = [];
// Iterate through unit state type's statuses.
foreach ($systemd_mapper[$state_type] as $state_status) {
$field_name = $state_status;
$field_value = $systemd_data[$state_type][$state_status] ?? null;
// Verify data passed by application script is valid.
// Update fields and rrd definition.
if (is_int($field_value) || is_null($field_value)) {
$fields[$field_name] = $field_value;
} else {
$log_message = 'Systemd Polling Warning: Invalid data returned by application for systemd unit ' .
$state_type . ' state with' . $state_status . ' state status: ' . $field_value;
log_event($log_message, $device, 'application');
continue;
}
$rrd_def->addDataset($field_name, 'GAUGE', 0);
}
$metrics = data_update_helper($app->app_id, $fields, $metrics, $name, $polling_type, $rrd_def, $state_type);
} else {
// Process systemd states that have three
// levels of depth (sub)
// Iterate through unit sub state types.
foreach ($systemd_mapper[$state_type] as $sub_state_type => $sub_state_statuses) {
$rrd_def = RrdDefinition::make();
$fields = [];
// Iterate through unit sub state type's statuses.
foreach ($sub_state_statuses as $sub_state_status) {
$field_name = $sub_state_status;
$field_value = $systemd_data[$state_type][$sub_state_type][$sub_state_status] ?? null;
// Verify data passed by application script is valid.
// Update fields and rrd definition.
if (is_int($field_value) || is_null($field_value)) {
$fields[$field_name] = $field_value;
} else {
$log_message = 'Systemd Polling Warning: Invalid data returned by application for systemd unit ' .
$state_type . ' state with ' . $sub_state_type . ' sub state type with ' . $sub_state_status .
' sub state status: ' . $field_value;
log_event($log_message, $device, 'application');
continue;
}
$rrd_def->addDataset($field_name, 'GAUGE', 0);
}
$flat_type = $state_type . '_' . $sub_state_type;
$metrics = data_update_helper($app->app_id, $fields, $metrics, $name, $polling_type, $rrd_def, $flat_type);
}
}
}
update_application($app, $output, $metrics);

157
includes/systemd-shared.inc.php Normal file
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@@ -0,0 +1,157 @@
<?php
// The 'load' and 'active' states only have
// two layers of depth in the systemd_mapper
// associative array. The 'sub' state has three
// layers. If another state type is introduced
// with three layers it must be added here.
$state_type_ternary_depth = ['sub'];
// Global variable used by the systemd application to
// build graphs, rrd names and descripts, and parse
// the systemd.py script results.
$systemd_mapper = [
'load' => [
'stub',
'loaded',
'not-found',
'bad-setting',
'error',
'merged',
'masked',
'total',
],
'active' => [
'active',
'reloading',
'inactive',
'failed',
'activating',
'deactivating',
'maintenance',
'total',
],
'sub' => [
'automount' => [
'dead',
'waiting',
'running',
'failed',
'total',
],
'device' => [
'dead',
'tentative',
'plugged',
'total',
],
'freezer' => [
'running',
'freezing',
'frozen',
'thawing',
'total',
],
'mount' => [
'dead',
'mounting',
'mounting-done',
'mounted',
'remounting',
'unmounting',
'remounting-sigterm',
'remounting-sigkill',
'unmounting-sigterm',
'unmounting-sigkill',
'failed',
'cleaning',
'total',
],
'path' => [
'dead',
'waiting',
'running',
'failed',
'total',
],
'scope' => [
'dead',
'start-chown',
'running',
'abandoned',
'stop-sigterm',
'stop-sigkill',
'failed',
'total',
],
'service' => [
'dead',
'condition',
'start-pre',
'start',
'start-post',
'running',
'exited',
'reload',
'stop',
'stop-watchdog',
'stop-sigterm',
'stop-sigkill',
'stop-post',
'final-watchdog',
'final-sigterm',
'final-sigkill',
'failed',
'auto-restart',
'cleaning',
'total',
],
'slice' => [
'dead',
'active',
'total',
],
'socket' => [
'dead',
'start-pre',
'start-chown',
'start-post',
'listening',
'running',
'stop-pre',
'stop-pre-sigterm',
'stop-pre-sigkill',
'stop-post',
'final-sigterm',
'final-sigkill',
'failed',
'cleaning',
'total',
],
'swap' => [
'dead',
'activating',
'activating-done',
'active',
'deactivating',
'deactivating-sigterm',
'deactivating-sigkill',
'failed',
'cleaning',
'total',
],
'target' => [
'dead',
'active',
'total',
],
'timer' => [
'dead',
'waiting',
'running',
'elapsed',
'failed',
'total',
],
],
];

731
tests/data/linux_systemd-v1.json Normal file
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@@ -0,0 +1,731 @@
{
"os": {
"discovery": {
"devices": [
{
"sysName": "<private>",
"sysObjectID": ".1.3.6.1.4.1.8072.3.2.10",
"sysDescr": "Linux enemess 4.18.0-408.el8.x86_64 #1 SMP Mon Jul 18 17:42:52 UTC 2022 x86_64",
"sysContact": "<private>",
"version": "4.18.0-408.el8.x86_64",
"hardware": "Generic x86 64-bit",
"features": null,
"location": "<private>",
"os": "linux",
"type": "server",
"serial": null,
"icon": "linux.svg"
}
]
},
"poller": "matches discovery"
},
"applications": {
"discovery": {
"applications": [
{
"app_type": "systemd",
"app_state": "UNKNOWN",
"discovered": 1,
"app_state_prev": null,
"app_status": "",
"app_instance": "",
"data": null
}
]
},
"poller": {
"applications": [
{
"app_type": "systemd",
"app_state": "OK",
"discovered": 1,
"app_state_prev": "UNKNOWN",
"app_status": "",
"app_instance": "",
"data": null
}
],
"application_metrics": [
{
"metric": "active_activating",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "active_active",
"value": 148,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "active_deactivating",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "active_failed",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "active_inactive",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "active_maintenance",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "active_reloading",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "active_total",
"value": 148,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "load_bad-setting",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "load_error",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "load_loaded",
"value": 148,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "load_masked",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "load_merged",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "load_not-found",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "load_stub",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "load_total",
"value": 148,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_automount_dead",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_automount_failed",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_automount_running",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_automount_total",
"value": 1,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_automount_waiting",
"value": 1,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_device_dead",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_device_plugged",
"value": 22,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_device_tentative",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_device_total",
"value": 22,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_freezer_freezing",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_freezer_frozen",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_freezer_running",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_freezer_thawing",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_freezer_total",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_mount_cleaning",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_mount_dead",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_mount_failed",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_mount_mounted",
"value": 12,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_mount_mounting",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_mount_mounting-done",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_mount_remounting",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_mount_remounting-sigkill",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_mount_remounting-sigterm",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_mount_total",
"value": 12,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_mount_unmounting",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_mount_unmounting-sigkill",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_mount_unmounting-sigterm",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_path_dead",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_path_failed",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_path_running",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_path_total",
"value": 2,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_path_waiting",
"value": 2,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_scope_abandoned",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_scope_dead",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_scope_failed",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_scope_running",
"value": 3,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_scope_start-chown",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_scope_stop-sigkill",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
"metric": "sub_scope_stop-sigterm",
"value": 0,
"value_prev": null,
"app_type": "systemd"
},
{
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10
tests/snmpsim/linux_systemd-v1.snmprec Normal file
View File

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