Fungible Clouds

Break the cloud services vendor lock-in

Credentials as Env Variables

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AWS credentials can either be passed in line (not ideal as your code is clutted with secret info) or it can be passed via environment variables (preferred method). The AWS tools require you to save your AWS account’s main access key id and secret access key in a specific way.

Create this credentials master file $HOME/.credentials-master.txt in the following format (replacing the values with your own credentials):

Credentials Master File (.credentials-master.txt) download

Note: The above is the sample content of .credentials-master.txt file you are creating, and not shell commands to run.

Protect the above file and set an environment variable to tell AWS tools where to find it:

export AWS_CREDENTIAL_FILE=$HOME/.credentials-master.txt

We can now use the command line tools to create and manage the cloud.

Using ipython

iPython is a beautiful interactive shell for python which you can easily install in a virtualenv. Just type

pip install tornado pyzmq ipython

and then run

ipython notebook --pylab inline

This would open in a browser window where you can run python interactively. According to iPython notebook installation, MathJax is not installed by default which can be installed with these steps.

from IPython.external.mathjax import install_mathjax