This commit introduces a new SNMP monitor feature to the application, allowing users to monitor devices using SNMP (Simple Network Management Protocol).pull/4717/head
Matt Visnovsky
7 months ago
parent
bab427f715
commit
d92003e172
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exports.up = function (knex) {
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return knex.schema
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.alterTable("monitor", function (table) {
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table.string("snmp_community_string", 255).defaultTo("public"); // Add community_string column
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table.string("snmp_oid").notNullable(); // Add oid column
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table.enum("snmp_version", ["1", "2c", "3"]).defaultTo("2c"); // Add snmp_version column with enum values
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table.float("snmp_control_value").notNullable(); // Add control_value column as float
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table.string("snmp_condition").notNullable(); // Add oid column
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});
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};
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@ -0,0 +1,69 @@
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const { MonitorType } = require("./monitor-type");
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const { UP, DOWN } = require("../../src/util");
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const snmp = require("snmp-native");
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class SNMPMonitorType extends MonitorType {
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name = "snmp";
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/**
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* Checks the SNMP value against the condition and control value.
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* @param {object} monitor The monitor object associated with the check.
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* @param {object} heartbeat The heartbeat object to update.
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* @param {object} _server Unused server object.
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*/
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async check(monitor, heartbeat, _server) {
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try {
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const session = new snmp.Session({ host: monitor.ipAddress, community: monitor.snmpCommunityString, version: monitor.snmpVersion });
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session.get({ oid: monitor.snmpOid }, (err, varbinds) => {
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if (err) {
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heartbeat.status = DOWN;
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heartbeat.msg = `Error: ${err.message}`;
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return;
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}
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// Assuming only one varbind is returned
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const value = varbinds[0].value;
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// Convert value to appropriate type based on SNMP type (assuming it's integer or string for simplicity)
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const numericValue = parseInt(value);
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const stringValue = value.toString();
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// Check against condition and control value
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switch (monitor.snmpCondition) {
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case '>':
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heartbeat.status = numericValue > monitor.snmpControlValue ? UP : DOWN;
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break;
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case '>=':
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heartbeat.status = numericValue >= monitor.snmpControlValue ? UP : DOWN;
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break;
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case '<':
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heartbeat.status = numericValue < monitor.snmpControlValue ? UP : DOWN;
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break;
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case '<=':
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heartbeat.status = numericValue <= monitor.snmpControlValue ? UP : DOWN;
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break;
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case '==':
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heartbeat.status = value === monitor.snmpControlValue ? UP : DOWN;
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break;
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case 'contains':
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heartbeat.status = stringValue.includes(monitor.snmpControlValue) ? UP : DOWN;
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break;
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default:
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heartbeat.status = DOWN;
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heartbeat.msg = `Invalid condition: ${monitor.snmpCondition}`;
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}
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session.close();
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});
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} catch (err) {
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heartbeat.status = DOWN;
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heartbeat.msg = `Error: ${err.message}`;
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}
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}
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}
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module.exports = {
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SNMPMonitorType,
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};
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