<Host name="localhost" appBase="webapps"
       unpackWARs="true" autoDeploy="true"
       xmlValidation="false" xmlNamespaceAware="false">

        <Valve className="org.apache.catalina.valves.AccessLogValve"
                 directory="logs" prefix="localhost_access_log." suffix=".txt"
                 pattern="combined" resolveHosts="false"/>

      </Host>