Continuous deployment explained

Continuous deployment (CD) is a software engineering approach in which software functionalities are delivered frequently and through automated deployments.[1] [2] [3]

Continuous deployment contrasts with continuous delivery (also abbreviated CD), a similar approach in which software functionalities are also frequently delivered and deemed to be potentially capable of being deployed, but are actually not deployed.[4] As such, continuous deployment can be viewed as a more complete form of automation than continuous delivery.[5]

Motivation

A major motivation for continuous deployment is that deploying software into the field more often makes it easier to find, catch, and fix bugs. A bug is easier to fix when it comes from code deployed five minutes ago instead of five days ago.[6]

Example

In an environment in which data-centric microservices provide the functionality, and where the microservices can have multiple instances, continuous deployment consists of instantiating the new version of a microservice and retiring the old version once it has drained all the requests in flight.[7] [8] [9]

See also

Notes and References

  1. Continuous Integration, Delivery and Deployment: A Systematic Review on Approaches, Tools, Challenges and Practices . Mojtaba . Shahin . Muhammad . Ali Babara . Liming . Zhu . IEEE Access . 5 . 10.1109/ACCESS.2017.2685629 . 2017 . 3909–3943 . 1703.07019 . 2017arXiv170307019S . 11638909 .
  2. Book: Helena . Holmstrom Olsson . Hiva . Alahyari . Jan . Bosch . 2012 38th Euromicro Conference on Software Engineering and Advanced Applications . Climbing the "Stairway to Heaven" -- A Mulitiple-Case Study Exploring Barriers in the Transition from Agile Development towards Continuous Deployment of Software . 392–399 . 2012 . 978-0-7695-4790-9 . 10.1109/SEAA.2012.54 . . 15199568 .
  3. On the journey to continuous deployment: Technical and social challenges along the way . Gerry Gerard . Claps . Richard . Berntsson Svenssonb . Aybüke . Aurum . Information and Software Technology . 57 . 21–31 . 2014. 10.1016/j.infsof.2014.07.009 .
  4. Book: 10.1109/ESEM.2017.18 . Beyond Continuous Delivery: An Empirical Investigation of Continuous Deployment Challenges . 2017 ACM/IEEE International Symposium on Empirical Software Engineering and Measurement (ESEM) . 111–120 . 2017 . Shahin . Mojtaba . Babar . Muhammad Ali . Zahedi . Mansooreh . Zhu . Liming . 978-1-5090-4039-1 . 3479812 .
  5. Web site: Continuous Deployment: An Essential Guide . . 2019-10-02 . . 2022-11-28 . Continuous deployment is the natural outcome of continuous delivery done well. Eventually, the manual approval delivers little or no value and is merely slowly things down. At that point, it is done away with and continuous delivery becomes continuous deployment..
  6. Book: Rossel, Sander. 2017. Continuous Integration, Delivery, and Deployment.
  7. Vera-Rivera. F. H.. 2018. A development process of enterprise applications with microservices. Journal of Physics: Conference Series. en. 1126. 1. 012017. 10.1088/1742-6596/1126/1/012017. 1742-6596. 2018JPhCS1126a2017V. free.
  8. Web site: Data-centric Software Manifesto. Serlet. Bertrand. 2019. Fungible. en-US. live. https://web.archive.org/web/20191014223853/https://www.fungible.com/tech/data-centric-sw-manifesto/ . 2019-10-14 . 2019-10-14.
  9. Web site: What you should know about microservices. Butler. Brandon. 2016-11-09. Computerworld. en. 2019-10-14.

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