Continuous deployment

I’ve come across a couple of interesting articles about continuous deployment – see Continous deployment and Continuous Deployment at IMVU: Doing the impossible fifty times a day.

This development team, working on a public website, have achieved 100% automation* of their deployment process.

*Interestingly the author makes the point that they have not been able to achieve a similar level of automation for database development.

They have taken the concept of continuous integration to the ‘extreme’. Every code change, once committed, is automatically released to the production environment – via a large and extensive set of automated testing.

As previously mentioned in Agile database development 101 this level of automation, including database development, is one teams should strive for – always being ready to deploy to production if so required.

But, I tend to agree with the comments made by Erik Brandstadmoen, I don’t think this approach – continually and automatically releasing to production – would be appropriate for many internal corporate systems. Fully automate deployment up to a pre-production environment and to where users can always see the latest changes – but stop at this point before going to live.

As well as the technical changes required for a new release to a system, there are often a number of other change management tasks – eg training, user information – that for practical reasons mean changes need to be ‘batched up’.

But, kudos must go to this team for achieving such a level of automation and the test suite they have developed.

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