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Rolling release, also known as rolling update or continuous delivery, is a concept in software development of frequently delivering updates to applications. [ 1 ] [ 2 ] [ 3 ] This is in contrast to a standard or point release development model which uses software versions which replace the previous version.
Software deployment is all of the activities that make a software system available for use. [1] [2] The general deployment process consists of several interrelated activities with possible transitions between them. These activities can occur on the producer side or on the consumer side or both.
For example, public requests may be routed to the blue server, making it the production server and the green server the staging server, which can only be accessed on a private network. Changes are installed on the non-live server, which is then tested through the private network to verify the changes work as expected.
Continuous deployment (CD) is a software engineering approach in which software functionalities are delivered frequently and through automated deployments. [ 1 ] [ 2 ] [ 3 ]
A canary release (or canary launch or canary deployment) allows developers to have features incrementally tested by a small set of developers. Feature flags like an alternate way to do canary launches [ 7 ] and allow targeting by geographic locations or even user attributes. [ 8 ]
The process contrasts with traditional methods where a collection of software updates were integrated into one large batch before deploying the newer version. Modern-day DevOps practices involve: continuous development, continuous testing, continuous integration, continuous deployment, and; continuous monitoring
In software deployment, an environment or tier is a computer system or set of systems in which a computer program or software component is deployed and executed. In simple cases, such as developing and immediately executing a program on the same machine, there may be a single environment, but in industrial use, the development environment (where changes are originally made) and production ...
Canaries or canary words or stack cookies are known values that are placed between a buffer and control data on the stack to monitor buffer overflows. When the buffer overflows, the first data to be corrupted will usually be the canary, and a failed verification of the canary data will therefore alert of an overflow, which can then be handled, for example, by invalidating the corrupted data.