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Juju charm to deploy and scale Jenkins
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README.md

Overview

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This charm (along with its companion, jenkins-slave) provides an easy way to deploy Jenkins on Ubuntu server and scale out Jenkins slaves.

This charm provides a Jenkins Server which can be accessed, after exposing, on http://:8080.

Usage

If you want to run jobs on separate nodes you will also need to deploy the jenkins-slave charm:

juju deploy jenkins
juju deploy -n 5 jenkins-slave
juju add-relation jenkins jenkins-slave

Slaves will attempt to connect via JNLP on port 48484 by default. This is configurable, e.g.:

juju set jenkins jnlp-port=12345

If you want the previously-default behaviour of a random TCP port, you can set this to -1:

juju set jenkins jnlp-port=-1

Or if you want to disable the feature entirely, set it to 0:

juju set jenkins jnlp-port=0

The default password for the 'admin' account will be auto-generated.

You can set it using:

juju set jenkins password=mypassword

Always change it this way - this account is used by the charm to manage slave configuration.

Then feel free to expose your Jenkins master:

juju expose jenkins

The Jenkins UI will be accessible on http://:8080

Scale out Usage

The main method to use the Jenkins service at scale is to add units to the jenkins-slave, as illustrated in the example usage:

juju deploy -n 5 jenkins-slave

Here the "-n 5" is adding 5 additional units (instances) to the jenkins-slave. Of course that "5" can be as large as you wish or your cloud provider supports. Additional information on scaling services with add-unit can be found at Juju Scaling Docs.

Storage Support

This charm includes Juju storage support which can be used in the standard way, for example:

juju deploy jenkins --storage jenkins=10G

Adding storage to an exising application is not supported.

Configuration

You have already seen the password configuration in the "Usage" section. Some other interesting config options are plugins and release. You can add config options via the command line with juju set or via a config file. More information on Juju config is at Juju Config Docs.

Plugin config example

juju set jenkins plugins=htmlpublisher view-job-filters bazaar git

Release config example

juju set jenkins release=trunk

You could also set these config options via a config.yaml on jenkins deploy. For example your config.yaml could look like

jenkins:
  plugins: htmlpublisher view-job-filters bazaar git 
  release: trunk 

You would then deploy jenkins with your config such as:

juju deploy --config config.yaml jenkins

Extending this charm

If you wish to perform custom configuration of either the master or slave services, you can branch this charm and add install hooks into hooks/install.d.

These will be executed when the main install, config-changed or upgrade-charm hooks are executed (as the config-changed and upgrade-charm hooks just call install).

Additional hooks are executed in the context of the install hook so you may use any variables which are defined in this hook.

Jenkins Project Information

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