Juju ODS Demo – The Home Version

A few weeks ago I gave a live demo during Canonical CEO Jane Silber’s keynote at the Essex OpenStack Conference, which was held in Boston October 4-7 (See my previous post for details of the conference and summit). The demo was meant to showcase our new favorite cloud technology at Canonical, juju. In order to do this, we deployed hadoop on top of our private OpenStack cloud (also deployed earlier in the week via juju and Ubuntu Orchestra) and fed it a “real” workload (a big giant chunk of data to sort) in less than 5 minutes.

I’ve had a few requests to explain how it works, so, here is a step by step on how to repeat said demo.

First, you need to setup juju to be able to talk to your cloud. The simplest way to do this is to sign up for an AWS account on Amazon, and get EC2 credentials (a secret key and a key ID is needed).

If you install juju in Ubuntu 11.10, or from the daily build PPA in any other release, you’ll get a skeleton environments.yaml just by running ‘juju’.

Once this is done, edit ~/.juju/environments.yaml to add your access-key: and secret-key:. Optionally, you can set them in AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY in the environment.

Now, you need the “magic” bit that turns juju status changes into commands for the “gource” source code visualization tool. Its available here:


(wgettable here)


You’ll also need to install the ‘gource’ visualization tool. I only tried this on Ubuntu 11.10, but it is available on other releases as well.

Make sure your desired target environment is either the only one in .juju/environments.yaml, or set to be the default with ‘default: xxxx’ at the root of the file. You need ‘juju status’ to return something meaningful (after bootstrap) for status2gource.py to work.

Now, in its own terminal, run this, note that cof_orange_hex.png is part of the official Ubuntu logo packs, but I forget where I got that. You may omit that commandline argument if you like, and a generic “person” image will be used.

python -u status2gource.py | gource --highlight-dirs \
--file-idle-time 1000000 \
--log-format custom \
--default-user-image cof_orange_hex.png \
--user-friction 0.5 \

This will not show anything until juju bootstrap is done and ‘juju status’ shows the machine 0 running. If you already have services deployed, it should build the tree rapidly.

So next if you haven’t done it already

juju bootstrap

Once your instance starts up, you should see a gource window pop up and the first two bits, the bootstrap node and the machine 0 node, will be added.

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