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A software engineering approach From Wikipedia, the free encyclopedia
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]
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]
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]
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