1 | <?php |
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2 | /** |
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3 | * AlertRules.php |
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4 | * |
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5 | * Extending the built in logging to add an event logger function |
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6 | * |
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7 | * This program is free software: you can redistribute it and/or modify |
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8 | * it under the terms of the GNU General Public License as published by |
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9 | * the Free Software Foundation, either version 3 of the License, or |
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10 | * (at your option) any later version. |
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11 | * |
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12 | * This program is distributed in the hope that it will be useful, |
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the |
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15 | * GNU General Public License for more details. |
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16 | * |
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17 | * You should have received a copy of the GNU General Public License |
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18 | * along with this program. If not, see <https://www.gnu.org/licenses/>. |
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19 | * |
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20 | * Original Code: |
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21 | * |
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22 | * @author Daniel Preussker <[email protected]> |
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23 | * @copyright 2014 f0o, LibreNMS |
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24 | * @license GPL |
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25 | * |
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26 | * @link https://www.librenms.org |
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27 | * |
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28 | * @copyright 2019 KanREN, Inc. |
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29 | * @author Heath Barnhart <[email protected]> |
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30 | */ |
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31 | |||
32 | namespace LibreNMS\Alert; |
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33 | |||
34 | use Carbon\Carbon; |
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35 | use LibreNMS\Enum\AlertState; |
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36 | |||
37 | class AlertRules |
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38 | { |
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39 | public function runRules($device_id) |
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40 | { |
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41 | |||
42 | //Check to see if under maintenance |
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43 | if (AlertUtil::isMaintenance($device_id) > 0) { |
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44 | echo "Under Maintenance, skipping alert rules check.\r\n"; |
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45 | |||
46 | return false; |
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47 | } |
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48 | //Check to see if disable alerting is set |
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49 | if (AlertUtil::hasDisableNotify($device_id)) { |
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50 | echo "Disable alerting is set, Clearing active alerts and skipping alert rules check\r\n"; |
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51 | $device_alert['state'] = AlertState::CLEAR; |
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52 | $device_alert['alerted'] = 0; |
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53 | $device_alert['open'] = 0; |
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54 | dbUpdate($device_alert, 'alerts', '`device_id` = ?', [$device_id]); |
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55 | |||
56 | return false; |
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57 | } |
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58 | //Checks each rule. |
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59 | foreach (AlertUtil::getRules($device_id) as $rule) { |
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60 | c_echo('Rule %p#' . $rule['id'] . ' (' . $rule['name'] . '):%n '); |
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61 | $extra = json_decode($rule['extra'], true); |
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62 | if (isset($extra['invert'])) { |
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63 | $inv = (bool) $extra['invert']; |
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64 | } else { |
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65 | $inv = false; |
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66 | } |
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67 | d_echo(PHP_EOL); |
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68 | if (empty($rule['query'])) { |
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69 | $rule['query'] = AlertDB::genSQL($rule['rule'], $rule['builder']); |
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70 | } |
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71 | $sql = $rule['query']; |
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72 | $qry = dbFetchRows($sql, [$device_id]); |
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73 | $cnt = count($qry); |
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74 | for ($i = 0; $i < $cnt; $i++) { |
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75 | if (isset($qry[$i]['ip'])) { |
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76 | $qry[$i]['ip'] = inet6_ntop($qry[$i]['ip']); |
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77 | } |
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78 | } |
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79 | $s = sizeof($qry); |
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80 | if ($s == 0 && $inv === false) { |
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81 | $doalert = false; |
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82 | } elseif ($s > 0 && $inv === false) { |
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83 | $doalert = true; |
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84 | } elseif ($s == 0 && $inv === true) { |
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85 | $doalert = true; |
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86 | } else { |
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87 | $doalert = false; |
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88 | } |
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89 | |||
90 | $current_state = dbFetchCell('SELECT state FROM alerts WHERE rule_id = ? AND device_id = ? ORDER BY id DESC LIMIT 1', [$rule['id'], $device_id]); |
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91 | if ($doalert) { |
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92 | if ($current_state == AlertState::ACKNOWLEDGED) { |
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93 | c_echo('Status: %ySKIP'); |
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94 | } elseif ($current_state >= AlertState::ACTIVE) { |
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95 | c_echo('Status: %bNOCHG'); |
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96 | // NOCHG here doesn't mean no change full stop. It means no change to the alert state |
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97 | // So we update the details column with any fresh changes to the alert output we might have. |
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98 | $alert_log = dbFetchRow('SELECT alert_log.id, alert_log.details FROM alert_log,alert_rules WHERE alert_log.rule_id = alert_rules.id && alert_log.device_id = ? && alert_log.rule_id = ? && alert_rules.disabled = 0 |
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99 | ORDER BY alert_log.id DESC LIMIT 1', [$device_id, $rule['id']]); |
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100 | $details = []; |
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101 | if (! empty($alert_log['details'])) { |
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102 | $details = json_decode(gzuncompress($alert_log['details']), true); |
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103 | } |
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104 | $details['contacts'] = AlertUtil::getContacts($qry); |
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105 | $details['rule'] = $qry; |
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106 | $details = gzcompress(json_encode($details), 9); |
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107 | dbUpdate(['details' => $details], 'alert_log', 'id = ?', [$alert_log['id']]); |
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108 | } else { |
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109 | $extra = gzcompress(json_encode(['contacts' => AlertUtil::getContacts($qry), 'rule'=>$qry]), 9); |
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110 | if (dbInsert(['state' => AlertState::ACTIVE, 'device_id' => $device_id, 'rule_id' => $rule['id'], 'details' => $extra], 'alert_log')) { |
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111 | if (is_null($current_state)) { |
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112 | dbInsert(['state' => AlertState::ACTIVE, 'device_id' => $device_id, 'rule_id' => $rule['id'], 'open' => 1, 'alerted' => 0], 'alerts'); |
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113 | } else { |
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114 | dbUpdate(['state' => AlertState::ACTIVE, 'open' => 1, 'timestamp' => Carbon::now()], 'alerts', 'device_id = ? && rule_id = ?', [$device_id, $rule['id']]); |
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115 | } |
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116 | c_echo(PHP_EOL . 'Status: %rALERT'); |
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117 | } |
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118 | } |
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119 | } else { |
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120 | if (! is_null($current_state) && $current_state == AlertState::RECOVERED) { |
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121 | c_echo('Status: %bNOCHG'); |
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122 | } else { |
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123 | if (dbInsert(['state' => AlertState::RECOVERED, 'device_id' => $device_id, 'rule_id' => $rule['id']], 'alert_log')) { |
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124 | if (is_null($current_state)) { |
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125 | dbInsert(['state' => AlertState::RECOVERED, 'device_id' => $device_id, 'rule_id' => $rule['id'], 'open' => 1, 'alerted' => 0], 'alerts'); |
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126 | } else { |
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127 | dbUpdate(['state' => AlertState::RECOVERED, 'open' => 1, 'note' => '', 'timestamp' => Carbon::now()], 'alerts', 'device_id = ? && rule_id = ?', [$device_id, $rule['id']]); |
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128 | } |
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129 | |||
130 | c_echo(PHP_EOL . 'Status: %gOK'); |
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131 | } |
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132 | } |
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133 | } |
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134 | c_echo('%n' . PHP_EOL); |
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135 | } |
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136 | } |
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137 | } |
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138 |