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authorFederico Ceratto <federico.ceratto@gmail.com>2016-03-30 21:40:42 +0000
committerFederico Ceratto <federico.ceratto@gmail.com>2016-03-30 21:40:42 +0000
commit9ce153ce7167c11adba8ac225edc7a707e97c6eb (patch)
tree9f6e849cce2dcc7e5b4e9e6252c843dc2d0787a2 /node.d/snmp.node.js
downloadnetdata-9ce153ce7167c11adba8ac225edc7a707e97c6eb.tar.xz
netdata-9ce153ce7167c11adba8ac225edc7a707e97c6eb.zip
Imported Upstream version 1.0.0upstream/1.0.0
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diff --git a/node.d/snmp.node.js b/node.d/snmp.node.js
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+'use strict';
+
+// This program will connect to one or more SNMP Agents
+
+// example configuration in /etc/netdata/snmp.conf
+/*
+{
+ "enable_autodetect": false,
+ "update_every": 5,
+ "max_request_size": 50,
+ "servers": [
+ {
+ "hostname": "10.11.12.8",
+ "community": "public",
+ "update_every": 10,
+ "max_request_size": 50,
+ "options": { "timeout": 10000 },
+ "charts": {
+ "snmp_switch.bandwidth_port1": {
+ "title": "Switch Bandwidth for port 1",
+ "units": "kilobits/s",
+ "type": "area",
+ "priority": 1,
+ "dimensions": {
+ "in": {
+ "oid": ".1.3.6.1.2.1.2.2.1.10.1",
+ "algorithm": "incremental",
+ "multiplier": 8,
+ "divisor": 1024
+ },
+ "out": {
+ "oid": ".1.3.6.1.2.1.2.2.1.16.1",
+ "algorithm": "incremental",
+ "multiplier": -8,
+ "divisor": 1024
+ }
+ }
+ },
+ "snmp_switch.bandwidth_port2": {
+ "title": "Switch Bandwidth for port 2",
+ "units": "kilobits/s",
+ "type": "area",
+ "priority": 1,
+ "dimensions": {
+ "in": {
+ "oid": ".1.3.6.1.2.1.2.2.1.10.2",
+ "algorithm": "incremental",
+ "multiplier": 8,
+ "divisor": 1024
+ },
+ "out": {
+ "oid": ".1.3.6.1.2.1.2.2.1.16.2",
+ "algorithm": "incremental",
+ "multiplier": -8,
+ "divisor": 1024
+ }
+ }
+ }
+ }
+ }
+ ]
+}
+*/
+
+// You can also give ranges of charts like the following.
+// This will append 1-24 to id, title, oid (on each dimension)
+// so that 24 charts will be created.
+/*
+{
+ "enable_autodetect": false,
+ "update_every": 10,
+ "max_request_size": 50,
+ "servers": [
+ {
+ "hostname": "10.11.12.8",
+ "community": "public",
+ "update_every": 10,
+ "max_request_size": 50,
+ "options": { "timeout": 20000 },
+ "charts": {
+ "snmp_switch.bandwidth_port": {
+ "title": "Switch Bandwidth for port ",
+ "units": "kilobits/s",
+ "type": "area",
+ "priority": 1,
+ "multiply_range": [ 1, 24 ],
+ "dimensions": {
+ "in": {
+ "oid": ".1.3.6.1.2.1.2.2.1.10.",
+ "algorithm": "incremental",
+ "multiplier": 8,
+ "divisor": 1024
+ },
+ "out": {
+ "oid": ".1.3.6.1.2.1.2.2.1.16.",
+ "algorithm": "incremental",
+ "multiplier": -8,
+ "divisor": 1024
+ }
+ }
+ }
+ }
+ }
+ ]
+}
+*/
+
+var net_snmp = require('net-snmp');
+var extend = require('extend');
+var netdata = require('netdata');
+
+if(netdata.options.DEBUG === true) netdata.debug('loaded ' + __filename + ' plugin');
+
+netdata.processors.snmp = {
+ name: 'snmp',
+
+ fixoid: function(oid) {
+ if(typeof oid !== 'string')
+ return oid;
+
+ if(oid.charAt(0) === '.')
+ return oid.substring(1, oid.length);
+
+ return oid;
+ },
+
+ prepare: function(service) {
+ if(typeof service.snmp_oids === 'undefined' || service.snmp_oids === null || service.snmp_oids.length === 0) {
+ // this is the first time we see this service
+
+ if(netdata.options.DEBUG === true)
+ netdata.debug(service.module.name + ': ' + service.name + ': preparing ' + this.name + ' OIDs');
+
+ // build an index of all OIDs
+ service.snmp_oids_index = {};
+ for(var c in service.request.charts) {
+ // for each chart
+
+ if(netdata.options.DEBUG === true)
+ netdata.debug(service.module.name + ': ' + service.name + ': indexing ' + this.name + ' chart: ' + c);
+
+ if(typeof service.request.charts[c].titleoid !== 'undefined') {
+ service.snmp_oids_index[this.fixoid(service.request.charts[c].titleoid)] = {
+ type: 'title',
+ link: service.request.charts[c]
+ };
+ }
+
+ for(var d in service.request.charts[c].dimensions) {
+ // for each dimension in the chart
+
+ var oid = this.fixoid(service.request.charts[c].dimensions[d].oid);
+ var oidname = this.fixoid(service.request.charts[c].dimensions[d].oidname);
+
+ if(netdata.options.DEBUG === true)
+ netdata.debug(service.module.name + ': ' + service.name + ': indexing ' + this.name + ' chart: ' + c + ', dimension: ' + d + ', OID: ' + oid + ", OID name: " + oidname);
+
+ // link it to the point we need to set the value to
+ service.snmp_oids_index[oid] = {
+ type: 'value',
+ link: service.request.charts[c].dimensions[d]
+ };
+
+ if(typeof oidname !== 'undefined')
+ service.snmp_oids_index[oidname] = {
+ type: 'name',
+ link: service.request.charts[c].dimensions[d]
+ };
+
+ // and set the value to null
+ service.request.charts[c].dimensions[d].value = null;
+ }
+ }
+
+ if(netdata.options.DEBUG === true)
+ netdata.debug(service.module.name + ': ' + service.name + ': indexed ' + this.name + ' OIDs: ' + netdata.stringify(service.snmp_oids_index));
+
+ // now create the array of OIDs needed by net-snmp
+ service.snmp_oids = new Array();
+ for(var o in service.snmp_oids_index)
+ service.snmp_oids.push(o);
+
+ if(netdata.options.DEBUG === true)
+ netdata.debug(service.module.name + ': ' + service.name + ': final list of ' + this.name + ' OIDs: ' + netdata.stringify(service.snmp_oids));
+
+ service.snmp_oids_cleaned = 0;
+ }
+ else if(service.snmp_oids_cleaned === 0) {
+ service.snmp_oids_cleaned = 1;
+
+ // the second time, keep only values
+ service.snmp_oids = new Array();
+ for(var o in service.snmp_oids_index)
+ if(service.snmp_oids_index[o].type === 'value')
+ service.snmp_oids.push(o);
+ }
+ },
+
+ getdata: function(service, index, ok, failed, callback) {
+ var that = this;
+
+ if(index >= service.snmp_oids.length) {
+ callback((ok > 0)?{ ok: ok, failed: failed }:null);
+ return;
+ }
+
+ var slice;
+ if(service.snmp_oids.length <= service.request.max_request_size) {
+ slice = service.snmp_oids;
+ index = service.snmp_oids.length;
+ }
+ else if(service.snmp_oids.length - index <= service.request.max_request_size) {
+ slice = service.snmp_oids.slice(index, service.snmp_oids.length);
+ index = service.snmp_oids.length;
+ }
+ else {
+ slice = service.snmp_oids.slice(index, index + service.request.max_request_size);
+ index += service.request.max_request_size;
+ }
+
+ if(netdata.options.DEBUG === true)
+ netdata.debug(service.module.name + ': ' + service.name + ': making ' + slice.length + ' entries request, max is: ' + service.request.max_request_size);
+
+ service.snmp_session.get(slice, function(error, varbinds) {
+ if(error) {
+ service.error('Received error = ' + netdata.stringify(error) + ' varbinds = ' + netdata.stringify(varbinds));
+
+ // make all values null
+ var len = slice.length;
+ while(len--)
+ service.snmp_oids_index[slice[len]].value = null;
+ }
+ else {
+ if(netdata.options.DEBUG === true)
+ netdata.debug(service.module.name + ': ' + service.name + ': got valid ' + service.module.name + ' response: ' + netdata.stringify(varbinds));
+
+ for(var i = 0; i < varbinds.length; i++) {
+ var value = null;
+
+ if(net_snmp.isVarbindError(varbinds[i])) {
+ if(netdata.options.DEBUG === true)
+ netdata.debug(service.module.name + ': ' + service.name + ': failed ' + service.module.name + ' get for OIDs ' + varbinds[i].oid);
+
+ service.error('OID ' + varbinds[i].oid + ' gave error: ' + snmp.varbindError(varbinds[i]));
+ value = null;
+ failed++;
+ }
+ else {
+ if(netdata.options.DEBUG === true)
+ netdata.debug(service.module.name + ': ' + service.name + ': found ' + service.module.name + ' value of OIDs ' + varbinds[i].oid + " = " + varbinds[i].value);
+
+ value = varbinds[i].value;
+ ok++;
+ }
+
+ if(value !== null) {
+ switch(service.snmp_oids_index[varbinds[i].oid].type) {
+ case 'title': service.snmp_oids_index[varbinds[i].oid].link.title += ' ' + value; break;
+ case 'name' : service.snmp_oids_index[varbinds[i].oid].link.name = value; break;
+ case 'value': service.snmp_oids_index[varbinds[i].oid].link.value = value; break;
+ }
+ }
+ }
+
+ if(netdata.options.DEBUG === true)
+ netdata.debug(service.module.name + ': ' + service.name + ': finished ' + service.module.name + ' with ' + ok + ' successful and ' + failed + ' failed values');
+ }
+ that.getdata(service, index, ok, failed, callback);
+ });
+ },
+
+ process: function(service, callback) {
+ this.prepare(service);
+
+ if(service.snmp_oids.length === 0) {
+ // no OIDs found for this service
+
+ if(netdata.options.DEBUG === true)
+ service.error('no OIDs to process.');
+
+ callback(null);
+ return;
+ }
+
+ if(typeof service.snmp_session === 'undefined' || service.snmp_session === null) {
+ // no SNMP session has been created for this service
+ // the SNMP session is just the initialization of NET-SNMP
+
+ if(netdata.options.DEBUG === true)
+ netdata.debug(service.module.name + ': ' + service.name + ': opening ' + this.name + ' session on ' + service.request.hostname + ' community ' + service.request.community + ' options ' + netdata.stringify(service.request.options));
+
+ // create the SNMP session
+ service.snmp_session = net_snmp.createSession (service.request.hostname, service.request.community, service.request.options);
+
+ if(netdata.options.DEBUG === true)
+ netdata.debug(service.module.name + ': ' + service.name + ': got ' + this.name + ' session: ' + netdata.stringify(service.snmp_session));
+
+ // if we later need traps, this is how to do it:
+ //service.snmp_session.trap(net_snmp.TrapType.LinkDown, function(error) {
+ // if(error) console.error('trap error: ' + netdata.stringify(error));
+ //});
+ }
+
+ // do it, get the SNMP values for the sessions we need
+ this.getdata(service, 0, 0, 0, callback);
+ }
+};
+
+var snmp = {
+ name: __filename,
+ enable_autodetect: true,
+ update_every: 1,
+ base_priority: 50000,
+
+ charts: {},
+
+ processResponse: function(service, data) {
+ if(data !== null) {
+ if(service.added !== true)
+ service.commit();
+
+ for(var c in service.request.charts) {
+ var chart = snmp.charts[c];
+
+ if(typeof chart === 'undefined') {
+ chart = service.chart(c, service.request.charts[c]);
+ snmp.charts[c] = chart;
+ }
+
+ service.begin(chart);
+
+ for( var d in service.request.charts[c].dimensions )
+ if(service.request.charts[c].dimensions[d].value !== null)
+ service.set(d, service.request.charts[c].dimensions[d].value);
+
+ service.end();
+ }
+ }
+ },
+
+ // module.serviceExecute()
+ // this function is called only from this module
+ // its purpose is to prepare the request and call
+ // netdata.serviceExecute()
+ serviceExecute: function(conf) {
+ if(netdata.options.DEBUG === true)
+ netdata.debug(this.name + ': snmp hostname: ' + conf.hostname + ', update_every: ' + conf.update_every);
+
+ var service = netdata.service({
+ name: conf.hostname,
+ request: conf,
+ update_every: conf.update_every,
+ module: this,
+ processor: netdata.processors.snmp
+ });
+
+ // multiply the charts, if required
+ for(var c in service.request.charts) {
+ if(netdata.options.DEBUG === true)
+ netdata.debug(this.name + ': snmp hostname: ' + conf.hostname + ', examining chart: ' + c);
+
+ if(typeof service.request.charts[c].update_every === 'undefined')
+ service.request.charts[c].update_every = service.update_every;
+
+ if(typeof service.request.charts[c].multiply_range !== 'undefined') {
+ var from = service.request.charts[c].multiply_range[0];
+ var to = service.request.charts[c].multiply_range[1];
+ var prio = service.request.charts[c].priority || 1;
+
+ if(prio < snmp.base_priority) prio += snmp.base_priority;
+
+ while(from <= to) {
+ var id = c + from.toString();
+ var chart = extend(true, {}, service.request.charts[c]);
+ chart.title += from.toString();
+
+ if(typeof chart.titleoid !== 'undefined')
+ chart.titleoid += from.toString();
+
+ chart.priority = prio++;
+ for(var d in chart.dimensions) {
+ chart.dimensions[d].oid += from.toString();
+
+ if(typeof chart.dimensions[d].oidname !== 'undefined')
+ chart.dimensions[d].oidname += from.toString();
+ }
+ service.request.charts[id] = chart;
+ from++;
+ }
+
+ delete service.request.charts[c];
+ }
+ else {
+ if(service.request.charts[c].priority < snmp.base_priority)
+ service.request.charts[c].priority += snmp.base_priority;
+ }
+ }
+
+ service.execute(this.processResponse);
+ },
+
+ configure: function(config) {
+ var added = 0;
+
+ if(typeof config.max_request_size === 'undefined')
+ config.max_request_size = 50;
+
+ if(typeof(config.servers) !== 'undefined') {
+ var len = config.servers.length;
+ while(len--) {
+ if(typeof config.servers[len].update_every === 'undefined')
+ config.servers[len].update_every = this.update_every;
+
+ if(typeof config.servers[len].max_request_size === 'undefined')
+ config.servers[len].max_request_size = config.max_request_size;
+
+ this.serviceExecute(config.servers[len]);
+ added++;
+ }
+ }
+
+ return added;
+ },
+
+ // module.update()
+ // this is called repeatidly to collect data, by calling
+ // service.execute()
+ update: function(service, callback) {
+ service.execute(function(serv, data) {
+ service.module.processResponse(serv, data);
+ callback();
+ });
+ },
+};
+
+module.exports = snmp;