Logstash HTTP plugin details

Elastic Stack Logstash
1

I have a question about Logstash http input plugin:

What is the format of URL for sending POST request to Logstash so Logstash can receive JSON message via http plugin?

Is it something like this: server_name:tcp_port/index ?

2

Is it something like this: server_name:tcp_port/index ?

Yes, and the "index" part in your example can be any string. The plugin will grab all HTTP requests sent to the port.

3

@magnusbaeck Thank you.

I am trying to send HTTP request with Java:

	HttpClient httpClient = HttpClientBuilder.create().build();
	try {
	    HttpPost request = new HttpPost("http://host_name:31311/test");
	    StringEntity params = new StringEntity("{\"field\":\"value\"}");
	    request.addHeader("content-type", "application/json");
	    request.setEntity(params);
	    HttpResponse response = httpClient.execute(request);
	} catch (Exception ex) {

	}

But the data was not sent to Logstash for some reason.

Do you have any ideas what is wrong in this approach?

4

So what happens? Does the code raise any exceptions or does the program think things are okay?

Testing and debugging things like this with a tool like curl is recommended.

5

Actually, yes. There is the following exception thrown:

org.apache.http.conn.HttpHostConnectException: Connect to host_name:31311 [host_name] failed: Connection timed out: connect
	at org.apache.http.impl.conn.HttpClientConnectionOperator.connect(HttpClientConnectionOperator.java:140)

I am on Windows, I tried command open host_name 31311 but I got this:

Connecting To host_name...Could not open connection to the host on port 31311: Connect failed

This is strange, because I am able to send data via HTTP request from another app from the same machine.

Do you have any thoughts about that?

6

Firewall issue maybe, I don't know.

7

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.