Agile development is critical for fast and high-quality application releases. To adopt this development process, many organizations also use continuous integration (CI), continuous delivery (CD), and continuous testing (testing) as a complement to Agile.
This blog will take a closer look at CI/CD/CT in Agile: continuous integration in Agile; continuous testing in Agile; and continuous delivery in Agile.
In the age of Agile and digital transformation strategies, every brand is looking to set itself apart. You need to offer services to end users on their terms, on their devices, at their convenience, streamlining and differentiating features. On top of that, end users expect everything to look great, work perfectly — and quickly.
When choosing your digital transformation strategy, there are key tradeoffs to understand between what are conflicting agendas. You need to get features to market faster. But you need to balance increasing presence on users’ devices against maintaining high application quality.
What’s commonly known is that acceleration can come in the form of adopting an Agile process:
Highly independent dev teams who are responsible for a feature or area of the code and delivering incremental functionality from design to production.
That’s where continuous and Agile go so well together.
CI/CD/CT in Agile Development: The Three Cs
Continuous integration (CI), continuous delivery (CD) and continuous testing (CT) are all important in Agile.
While serving slightly different objectives, these elements can integrate to assist the team in achieving the goals we mentioned: velocity and quality.
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Continuous Integration is a necessary approach for any Agile team. The image below depicts a team that has not implemented a CI process. You see a 60-day development period and then after all that, the team shares their code.
The outcome of such a scenario is creating or extending the post-sprint stabilization phase, where developers need to test and redo integration points. This gets expensive. Naturally, this is also very frustrating to developers and testers.
Continuous integration in Agile changes that. The team integrates increments from the main tree continuously. Using test automation, they are able to ensure the integration actually works.
Each sprint finishes on time and within the defined quality expectation. This shrinks the stabilization phase, possibly enabling you to get rid of it altogether. In a CI process the ideal would be a working product at the end of each sprint, maybe even each day.
Continuous delivery in Agile is the practice of automating all processes leading up to deployment. Thus, continuous delivery takes Agile through to its conclusion.
Continuous delivery includes many steps, such as validating the quality of the build in the previous environment (e.g., dev environment), promoting to staging, etc. These steps, done manually, can take significant effort and time. Using cloud technologies and proper orchestration, they can be automated.
As opposed to continuous delivery, continuous deployment takes agility to the next level.
The working assumptions are that:
The code is working at any point in time (for example, developers must check their code before they commit).
A significant amount of testing is done automatically, such that we have confidence the build is solid.
That level of test and orchestration automation is difficult to find, but some Agile SaaS organizations are certainly benefitting from this approach.
To complete an efficient CD process you need to ensure you have a monitoring dashboard for your production environment in place. This helps you eliminate performance bottlenecks and respond fast to issues.
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