What are some examples of Logstash configurations?

What are some examples of Logstash configurations?

Logstash configurations can vary widely based on the data source and destination. For example, a simple configuration might look like this:

input {
  file {
    path => "/var/log/syslog"
    start_position => "beginning"
  }
}

filter {
  grok {
    match => { "message" => "%{COMBINEDAPACHELOG}" }
  }
}

output {
  elasticsearch {
    hosts => ["http://localhost:9200"]
    index => "syslog-%{+YYYY.MM.dd}"
  }
}

Can you explain what each part of that configuration does?

Sure! The input section specifies where Logstash should read data from, in this case, a log file. The filter section processes the data, using the grok filter to parse the log format. Finally, the output section defines where to send the processed data, which is Elasticsearch in this example.

Are there more complex examples available?

Yes, more complex configurations can include multiple inputs, filters, and outputs. For instance, you can combine data from different sources, apply various filters like mutate or date, and send the output to multiple destinations like Elasticsearch and a file.

Where can I find more resources on Logstash configurations?

You can find extensive documentation on the official Elastic website, as well as community forums and GitHub repositories that share configuration examples.