shupernova - use novaclient with multiple nova environments the easy way

You may like shupernova if you regularly have the following problems:

• You hate trying to source multiple novarc files when using nova
• You get your terminals confused and do the wrong things in the wrong nova environment
• You don't like remembering things
• You need to share common skeleton environment variables for nova with your teams
• You don't want to leave passwords lying around in plaintext.

If any of these complaints ring true, shupernova is for you. shupernova manages multiple nova environments without sourcing novarc's or mucking with environment variables.

Installation

$ cat bashrc_sample >> ~/.bashrc

Configuration

Enabling encryption: Uncomment the gpg related lines in your bashrc. Ensure gpg is installed and gpg-agent is configured.

For shupernova to work properly, each environment must be defined in ~/.shupernova (in your user's home directory). The data in the file is exactly the same as the environment variables which you would normally use when running nova. You can copy/paste from your novarc files directly into configuration sections within ~/.shupernova. If encryption is enabled, these files will be opportunistically encrypted.

Here's an example of two environments, production and development:

~/.shupernova/production:

-->cut<--
NOVA_URL=http://production.nova.example.com:8774/v1.1/
NOVA_VERSION=1.1
NOVA_USERNAME = jsmith
NOVA_API_KEY = fd62afe2-4686-469f-9849-ceaa792c55a6
NOVA_PROJECT_ID = nova-production
-->cut<--

~/.shupernova/development

-->cut<--
NOVA_URL=http://dev.nova.example.com:8774/v1.1/
NOVA_VERSION=1.1
NOVA_USERNAME = jsmith
NOVA_API_KEY = 40318069-6069-4d9f-836d-a46df17fc8d1
NOVA_PROJECT_ID = nova-production
-->cut<--

If you already have an existing novarc, you can use the "cp" technology to turn it into a shupernova profile. These profiles will be automatically encrypted as encountered if you enable the gpg options.

When you use shupernova, you'll refer to these environments as production and development. Every environment is specified by its configuration header name.

Usage

shupernova [environment] [novaclient arguments...]

Passing commands to nova

For example, if you wanted to list all instances within the production environment:

shupernova production list

Show a particular instance's data in the preprod environment:

shupernova preprod show 3edb6dac-5a75-486a-be1b-3b15fd5b4ab0a

The first argument is generally the environment argument and it is expected to be a single word without spaces. Any text after the environment argument is passed directly to nova.

Listing your configured environments

You can list all of your configured environments by using the ls command.

A brief note about environment variables

shupernova will only replace and/or append environment variables to the already present variables for the duration of the nova execution. If you have NOVA_USERNAME set outside the script, it won't be used in the script since the script will pull data from ~/.shupernova and use it to run nova. In addition, any variables which are set prior to running shupernova will be left unaltered when the script exits.