Setting up Logstash
Logstash allows users to collect, parse, and transform log messages. It supports a number of input (https://www.elastic.co/guide/en/logstash/current/input-plugins.html) and output (https://www.elastic.co/guide/en/logstash/current/output-plugins.html) plugins that allow Logstash to collect logs from a variety of sources, parse and transform them, and then write the results to one of the supported plugins. To set up Logstash, download the latest version from the Logstash downloads page (https://www.elastic.co/downloads/logstash) and extract it as shown in the following code snippet—this book uses Logstash 6.1.1, which can be downloaded from the release page of 6.1.1 (https://www.elastic.co/downloads/past-releases/logstash-6-1-1 ...
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