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Automated Deployments
Fabric
Fabric lets you run commands on servers from inside Python scripts. This is a great
tool for automating server admin tasks.
Idempotency
If your deployment script is deploying to existing servers, you need to design them
so that they work against a fresh installation
and
against a server that’s already
configured.
Keep config files under source control
Make sure your only copy of a config file isn’t on the server! They are critical to
your application, and should be under version control like anything else.
Automating provisioning
Ultimately,
everything
should be automated, and that includes spinning up brand
new servers and ensuring they have all the right software installed. This will involve
interacting with the API of your hosting provider.
Configuration management tools
Fabric is very flexible, but its logic is still based on scripting. More advanced tools
take a more “declarative” approach, and can make your life even easier. Ansible and
Vagrant are two worth checking out (see
Appendix C), but there are many more
(Chef, Puppet, Salt, Juju…).
Further Reading
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