Ubuntu Juju¶

This lesson will introduce you to Ubuntu Juju, an open-source service management tool.

Tip

Duration: 1 hour

Prerequisite¶

In order to conduct this lesson you should have knowledge of

Description¶

Ubuntu Juju is an open source configuration management tool to deploy and provision software on a virtualized environment. MySQL, RabbitMQ, OpenStack, WordPress, Apache, MediaWiki, MongoDB, Hadoop, and many other software are available on the Juju’s official repository, Juju Charm Store. Juju Charm is a structured bundle of files with metadata, configuration data and hooks with some extra support files to provision cloud software.

This lesson covers for:

Juju installation on ubuntu (or windows)
Juju Quick start
Juju GUI
Media Wiki or WordPress
iptables for virtual networks

Juju Installation on FutureSystems¶

Here we use a OpenStack VM instance to start Juju.

Note

If you need to know how to create a VM instance on FutureSystems, see here: Launching a New Instance

Installation on Ubuntu¶

Start a VM instance with futuresystems/Ubuntu-14.04.

Once you are in a VM instance, refresh the package lists with the following commands:

sudo add-apt-repository ppa:juju/stable -y
sudo apt-get update

Install Juju packages:

sudo apt-get install juju-quickstart -y
sudo apt-get install juju-core -y

Installation on OSX (Optional)¶

Try to use Homebrew for installing Juju on OSX:

brew install juju-quickstart
brew install juju

Installation on Windows (Optional)¶

Download link for Windows 7, 8 (as of 03/31/2015): https://launchpad.net/juju-core/1.21/1.21.3/+download/juju-setup-1.21.3-signed.exe

Warning

The installation on Windows and OSX are not tested by our team.

Testing your Setup¶

juju-quickstart mediawiki-single

Configuration of Cloud Environment¶

In this step, you choose your cloud provider. You can simply choose a local environment. Juju will deploy software inside of your VM instance.

Juju GUI¶

juju-quickstart contains Juju GUI. You can use a web browser to manage your services on Juju.

IP tables Configuration¶

Since Juju GUI is running with a virtual network in your VM instance, you need to configure iptables. Your Juju GUI will be served on your floating IP address with the FORWARD rules.:

sudo iptables -t nat -A PREROUTING -p tcp -d 0.0.0.0 --dport 443 -j DNAT --to-destination [IP ADDRESS of Juju GUI]:443

You can find a IP address of your Juju GUI with the following command:

juju status

You may find public-address under juju-gui section:

...
services:
  juju-gui:
  charm: cs:trusty/juju-gui-22
  exposed: true
  units:
    juju-gui/0:
      agent-state: started
      agent-state-info: (started)
      agent-version: 1.22.0.1
      machine: "1"
      open-ports:
      - 80/tcp
      - 443/tcp
      public-address: [IP ADDRESS]
...

Admin Password¶

To login Juju GUI, you need a username and a password. When you start a service with juju-quickstart, the username and the password will be printed out on your screen. Use them to login.

An example of output:

...
Juju GUI URL: https://10.0.3.1
username: admin
password: adm-b908bcba211a1234ac73e732b6e3315d
...

Screenshot of Juju GUI¶

Exercises¶

Exercise I¶

Try to deploy wordpress using Ubuntu Juju.

Reference and Acknowledgement¶

Basic instructions and lessons in this page are adapted from the Juju website

Juju Charm Store: https://jujucharms.com/solutions