on error does not get called if server is down

[rparies]

hello, i was assuming that if the graylog server was down , the on error would be called.
if the server is up, my messages are being sent correctly and can be seen on graylog
i am using version 0.1.3

this is my code snippet:

thanks for any help

var gl2 = new graylog2.graylog({
      servers: config.loggingService.graylog2.servers,       
      bufferSize: config.loggingService.graylog2.bufferSize   
    });

gl2.on('error', function (error) {
      console.error('Error while trying to write to graylog2:', error);
    });

[ronkorving]

Because the Graylog protocol runs over UDP, I don't think there's any way to guarantee delivery. You'll have to monitor your Graylog server independently to know if it's up.

The error event will be emitted on a DNS lookup failure for example, but as far as I'm aware it cannot be triggered by a delivery failure.

[petermikitsh]

I'm running a local graylog instance (via docker) and logging via this module. No log messages are showing up in the web portal. It's a shame there's no way to validate where in the pipeline things are going wrong.

What would be beneficial, however, is to have some documentation of how to properly configure a graylog server when using this module.

[ronkorving]

I'm not sure I follow. How does the configuration of the graylog server impact the use of this module? In any case, if there are things to take into account in your opinion, a pull request to the readme is always most welcome.

[petermikitsh]

@ronkorving If you take a fresh, vanilla Graylog Server instance and use this package, it won't capture logs. You have to go to <hostname>/system/inputs in the graylog web client, and create a GELF UDP input.

After creating the input, you use the graylog server's hostname and port (e.g., 12201) and supply it to the graylog2 constructor, e.g.,

var logger = new graylog2.graylog({
  servers: [{
    'host': 'hostname',
    port: 12201
  }]
});

It's pretty simple after you set it up once, but as a new graylog user, I stumbled for a bit.