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Diffstat (limited to 'node.d/snmp.node.js')
| -rwxr-xr-x | node.d/snmp.node.js | 436 |
1 files changed, 436 insertions, 0 deletions
diff --git a/node.d/snmp.node.js b/node.d/snmp.node.js new file mode 100755 index 00000000..21615f62 --- /dev/null +++ b/node.d/snmp.node.js @@ -0,0 +1,436 @@ +'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; |