Configuration file for Logstash to run locally.

localhost_logstash.conf

input {
  http_poller {
    # Is a hash with a list of URLs.
    urls => {
      "localhost-health-check" => "http://localhost:9292/health-check"
    }
    # Default is 1, but I don't want to make any retry.
    automatic_retries => 0
    # Check the endpoint in URLs every 10s.
    interval => 10
    # Wait no longer than 8s for the request to complete.
    request_timeout => 8
    # Store metadata about the request in this field.
    metadata_target => http_poller_metadata
    # Tag this request so we can use it to filter.
    tags => anomaly
    # Default is "json", but Cuba doesn't respond with JSON.
    codec => "plain"
  }
}

filter {
  # The poller doesn't set an @status field and I want to use for filter purpose.
  # In the http_poller_metadata field you'll see all the request info, included
  # the status.
  if [http_poller_metadata] {
    mutate {
      add_field => {
        "@status" => "%{http_poller_metadata[code]}"
      }
    }
  }

  # Classify slow requests
  if [http_poller_metadata][runtime_seconds] and [http_poller_metadata][runtime_seconds] > 0.9 {
    mutate {
      add_tag => "slow_requests"
    }
  }
}

output {
  elasticsearch {
    hosts => ["localhost:9200"]
  }
}