Jenkins on Mesos

The mesos-jenkins plugin allows Jenkins to dynamically launch Jenkins slaves on a Mesos cluster depending on the workload!

Put simply, whenever the Jenkins Build Queue starts getting bigger, this plugin automatically spins up additional Jenkins slave(s) on Mesos so that jobs can be immediately scheduled! Similarly, when a Jenkins slave is idle for a long time it is automatically shut down.

Prerequisite

You need to have access to a running Mesos cluster. For instructions on setting up a Mesos cluster, please refer to the Mesos website.

Building the plugin

Build the plugin as follows:

    $ mvn package

This should build the Mesos plugin (mesos.hpi) in the target folder.

NOTE: If you want to build against a different version of Mesos than the default you'll need to update the mesos version in pom.xml. You should use the same (recommended) or compatible version as the one your Mesos cluster is running on.

Installing the plugin

Go to 'Manage Plugins' page in the Jenkins Web UI and manually upload and install the plugin.

Alternatively, you can just copy the plugin to your Jenkins plugins directory (this might need a restart of Jenkins).

    $ cp target/mesos.hpi ${JENKINS_HOME}/plugins

If you simply want to play with the mesos-jenkins plugin, you can also bring up a local Jenkins instance with the plugin pre-installed as follows:

	$ mvn hpi:run

Building the Mesos native library

First, download Mesos.

NOTE: Ensure the Mesos version you download is same (recommended) or compatible with the mesos version in pom.xml.

Now, build it as follows:

	$ cd mesos
	$ mkdir build && cd build
	$ ../configure
	$ make

This should build the Mesos native library in the build/src/.libs folder.

Vagrant

If you are just looking to play with Mesos and this plugin in a VM, you could do so with the included Vagrantfile.

	$ vagrant up
	$ vagrant ssh

Configuring the plugin

Now go to 'Configure' page in Jenkins. If the plugin is successfully installed you should see an option to 'Add a new cloud' at the bottom of the page. Add the 'Mesos Cloud' and give the path to the Mesos native library (e.g., libmesos.so on Linux or libmesos.dylib on OSX) (see the above section) and the address (HOST:PORT) of a running Mesos master. Click 'Save' for the plugin to connect to Mesos.

Login to the Mesos master's Web UI to verify that the plugin is registered as 'Jenkins Framework'.

Mesos slave setup

Ensure Mesos slaves have a jenkins user or the user the Jenkins master is running as.

Configuring Jenkins jobs

Finally, just add mesos label to the jobs (configure -> Restrict where this project can run checkbox) that you want to be run on a Jenkins slave launched on Mesos.

Thats it!

Please email user@mesos.apache.org with questions!