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Logstash Grok Filter Example For Jboss Server Access Logs

Logstash is a great tool for centralizing application server logs. Here is an excerpt from a jboss application server's access logs and corresponding grok filter for them.

Jboss Access Logs:


Converting some fields' data types to numbers (in the example integer and float) are useful for later statistical calculations.
Logstash Filter (Logstash Version 2.3.4)


When logs are sent to elasticsearch, string fields would be stored as analyzed fields.

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Sending Jboss Server Logs to Logstash Using Filebeat with Multiline Support

In addition to sending system logs to logstash, it is possible to add a prospector section to the filebeat.yml for jboss server logs. Sometimes jboss server.log has single events made up from several lines of messages. In such cases Filebeat should be configured for a multiline prospector.
Filebeat takes lines do not start with a date pattern (look at pattern in the multiline section "^[[:digit:]]{4}-[[:digit:]]{2}-[[:digit:]]{2}" and negate section is set to true) and combines them with the previous line that starts with a date pattern.

server.log file excerpt where DatePattern: yyyy-MM-dd-HH and ConversionPattern: %d %-5p [%c] %m%n
Logstash filter: