title: How to include regular expression in logstash file input path
body: <p>I am using logstash to convert tomcat access logs into json format. The access log names are in below format</p>
  
  <pre><code>abcd_access_log.2016-03-15.log
  efgh_access_log.2016-02-16.log
  </code></pre>
  
  <p>The input filter is:</p>
  
  <pre><code>input { 
      file {
          path =&gt; "C:\tools\apache-tomcat-8.0.32\logs\*_access_log.*.log"
          start_position =&gt; beginning
      } 
  }
  </code></pre>
  
  <p>It is not showing logs with the regex used. What regex should I use here to select only these files?</p>