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Graylog Project

The purpose of this project is to make it easier to develop Graylog and its plugins.

Graylog consists of the core server project and several plugins (e.g. the collector plugin) which are all separate maven projects.

To make it possible to build all of those project with a single mvn package command, we built this meta project which pulls in the core server and all plugins into a single maven reactor.

The graylog-project CLI tool is used to manage this meta project and is a requirement.


  1. be able connect via ssh to github (process described here, can be tested with ssh -T )
  2. Install the latest version of the graylog-project CLI tool
  3. Bootstrap the graylog-project repository
  4. Import the graylog-project repository into your IDE

Install CLI Tool

Go to the releases page of the CLI tool and download the latest version for your platform.

Put the binary somewhere into your PATH.


$ mkdir -p $HOME/bin
$ cp graylog-project.linux $HOME/bin/graylog-project
$ chmod +x $HOME/bin/graylog-project

If you use the example above, please make sure your $HOME/bin is in your PATH!


Use the graylog-project tool to bootstrap the graylog-project repository via the graylog-project bootstrap github://Graylog2/graylog-project.git command.


$ graylog-project bootstrap github://Graylog2/graylog-project.git
    git clone graylog-project
      Cloning into 'graylog-project'...
    git checkout master
      Already on 'master'
      Your branch is up-to-date with 'origin/master'.
Cloning into graylog-project-repos/graylog2-server
    git clone graylog-project-repos/graylog2-server
      Cloning into 'graylog-project-repos/graylog2-server'...
Checkout revision: master
    git branch master origin/master
    git checkout master
      Already on 'master'
      Your branch is up-to-date with 'origin/master'.
Cloning into graylog-project-repos/graylog-plugin-anonymous-usage-statistics
    git clone graylog-project-repos/graylog-plugin-anonymous-usage-statistics
      Cloning into 'graylog-project-repos/graylog-plugin-anonymous-usage-statistics'...
Checkout revision: master
    git branch master origin/master
    git checkout master
      Already on 'master'
      Your branch is up-to-date with 'origin/master'.
Cloning into graylog-project-repos/graylog-plugin-map-widget
    git clone graylog-project-repos/graylog-plugin-map-widget
      Cloning into 'graylog-project-repos/graylog-plugin-map-widget'...
Checkout revision: master
    git branch master origin/master
    git checkout master
      Already on 'master'
      Your branch is up-to-date with 'origin/master'.


Generating pom.xml file from template pom.xml.tmpl
Generating runner/pom.xml file from template runner/pom.xml.tmpl
Generating src/main/assembly/server-tarball.xml file from template src/main/assembly/server-tarball.xml.tmpl
Writing manifest state to .graylog-project-manifest-state

Checking out a particular version

The project contains various manifest files specifying the version of Graylog project repositories to be checked out. The manifests/master.json file is used by default. The --manifest argument allows you to check out a different version:

graylog-project bootstrap github://Graylog2/graylog-project.git --manifest manifests/4.2.json

The X.Y.json manifests will checkout the current code from that branch in Github. The resulting build artifact will be an X.Y-SNAPSHOT version.

The release-X.Y.Z.json manifests will checkout the code for that exact version of Graylog. So, the resulting build artifact will be an X.Y.Z version.

IDE Import

Now you can import the graylog-project folder into your IDE of choice.

At Graylog we are using IntelliJ IDEA so we are using that for the following example.

After importing the project into your IDE, create a server run configuration:

IntelliJ Run Config

  • Make sure to use the runner module for the Use classpath of module option
  • Use the graylog2-server directory as Working directory
  • In Program arguments use server -f graylog.conf --local (--local to avoid sending usage stats and running version checks)

This allows the listed plugins to be on the same classpath and thus loaded directly without having to go through mvn package and symlinking/copying into Graylog's plugins folder.

Server Configuration File

Create a graylog.conf file inside the graylog2-server directory based on the misc/graylog.conf example configuration.

Initial Build

Before you can run the server from the IDE, you have to run an initial build to create some assets.

$ mvn compile

This will build the backend and frontend parts.

For a faster compile, you can skip building the frontend, building javadocs, and running tests:

mvn -Dmaven.javadoc.skip=true -DskipTests compile


Elasticsearch & MongoDB

Before you start the server, make sure you have an Elasticsearch and MongoDB service running. If you're just testing this out and you don't care about persistent data, you can run:

sudo sysctl -w vm.max_map_count=262144
docker run -d -p 27017:27017 --name mongo mongo:latest
docker run -d -p 9200:9200 -p 9300:9300 elasticsearch:7.10.2

Make sure that graylog.conf contains the correct connection details for Elasticsearch and MongoDB.

Server Start

Now you should be able to start the server from your IDE by using the run configuration that you created before.

Web Interface Start

For development we are using the webpack-dev-server. You can start it by using the following command inside the graylog2-server/graylog2-web-interface directory.

$ ./node/yarn/dist/bin/yarn start

If you are running the 2.4 branch or earlier, you have to use npm to start the development webserver:

$ ./node/npm run start

The web interface is now reachable via http://localhost:8080/.

Working with Proxy

To be able to run builds in environments that needs proxy settings to access the internet, first run mvn with the option to disable proxy by-pass to yarn.

mvn -Dfrontend.yarn.yarnInheritsProxyConfigFromMaven=false

Add the Proxy settings to the users .yarnrc:

proxy "https://<user>:<password>"
https-proxy "https://<user>:<password>"


Packaging/development helper for Graylog


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