node-zabbix-sender

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The library is an implementation of zabbix_sender utility, which sends items data to zabbix server
using the zabbix trapper protocol. Because the library is a pure Node.js/Javascript implementation, it doesn't
require invocation of zabbix_sender utility. So there is no any child_process involved!

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``javascript
var ZabbixSender = require('node-zabbix-sender');
var Sender = new ZabbixSender({host: 'zabbix.example.com'});

// Add items to request
Sender.addItem('webserver', 'httpd.running', 0);
Sender.addItem('dbserver', 'mysql.ping', 1);

// Add item with default host
Sender.addItem('httpd.logs.size', 1024);

// Send the items to zabbix trapper
Sender.send(function(err, res) {
if (err) {
throw err;
}

// print the response object
console.dir(res);
});
`

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`javascript
var ZabbixSender = require('node-zabbix-sender');
var Sender = new ZabbixSender({host: 'zabbix.example.com'});

// addItem supports chaining
// Here is an example: add item and & send it
Sender.addItem('cpu_load', 0.15).send(function(err, res) {
if (err) {
throw err;
}

// print the response object
console.dir(res);
});
`

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Whenever you create a new instance of zabbix sender, you can pass an options object (e.g new ZabbixSender(opts))
here are the options defaults:

`javascript
{
host: 'localhost',
port: 10051,
timeout: 5000,
with_ns: false,
with_timestamps: false,
items_host: require('os').hostname()
}
`
- host and port are self-explanatory, the zabbix server host & port
- timeout is a socket timeout in milliseconds, when connecting to the zabbix server
- with_timestamps when you addItem, timestamp will be added as well
- with_ns implies with_timestamps, nanoseconds portion of the timestamp seconds will be added to the item
- items_host a target monitored host in zabbix. used when you don't specify the host when you addItem, see example above

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addItem([host], key, value)

Adds an item to the request payload. The item data won't be sent until the send method invoked.
The return value is self instance, so chaining can be used.

clearItems()

Clears the previously added items (if any). Mostly used internally, but you can use this method,
if you want to make sure no orphan items are present. The return value is self instance, so chaining can be used.

countItems()

Just returns the number of unsent items.

send(callback)

Sends all items that were added to the request payload.
The callback function passes 3 arguments error (if any), the response from zabbix server (trapper),
and the items array of item objects. The send method clears items that were previously added.
In case of error, the previously added items will be kept, for the next send` invocation.

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- https://www.zabbix.org/wiki/Docs/protocols/zabbix_sender/3.4
- https://www.zabbix.org/wiki/Docs/protocols/zabbix_agent/3.4

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Licensed under the MIT License. See the LICENSE file for details.