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README.md

grokconstructor

AVAILABLE ON http://grokconstructor.appspot.com/

Grok is a collection of named regular expressions that can be used - for instance with logstash http://logstash.net/ - to parse logfiles. GrokDiscovery http://grokdebug.herokuapp.com/ can somewhat help you by suggesting regular expressions. GrokConstructor goes beyond that by finding many possible regular expressions that match a whole set of logfile lines by using groks patterns and fixed strings. This can be done automatically (which is of limited use only for small stuff), or in a incremental process.

How to run it

http://grokconstructor.appspot.com/

The best way is probably to use it on http://grokconstructor.appspot.com/ - there is also a good description, and you can use it on some examples or for your own log lines you want to match.

Appengine Devserver, started from maven

To run locally, build with mvn clean install and start with mvn appengine:devserver . It runs on http://localhost:9090/ .

Deploy as a WAR

If you want to run it on a system without internet connection or that has an application server, anyway, you can also deploy the created target/GrokConstructor-*-SNAPSHOT.war e.g. on a Tomcat.

Standalone Executable

java -jar GrokConstructor-0.1.0-SNAPSHOT-standalone.jar

runs an embedded Tomcat that makes it available at http://localhost:8080/ . Please be aware that this creates a directory .extract in the current directory that contains the unpacked webapp. You can print additional arguments (such as ports, unpack location) with

java -jar GrokConstructor-0.1.0-SNAPSHOT-standalone.jar -h

With Docker

If you don't have a JDK installation and maven installed on your server and don't want to create a standalone executable otherwise, you can also run the build and startup within a on-build docker container (courtesy of Timothy Van Heest http://turtlemonvh.github.io/). Please note that this container executes the maven build within the docker container and then starts the development server.

docker build -t grokconstructor .

docker run -d -p 8080:8080 grokconstructor

Alternatively, you can run it with docker-compose:

docker-compose up

About

Semi-automatic incremental construction and debugging of regular expressions for grok to parse logfiles for logstash http://logstash.net/ . Deployed at http://grokconstructor.appspot.com/ .

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