Traffic split
Traffic split is a key concept that has recently gained popularity. It abstracts networking functions through a proxy without having to change the application. Traffic split allows dark launches of applications to select groups of users such as co-workers, friends, and family. Canary deployments (progressive traffic shift), A/B testing (HTTP header and cookie traffic routing), and blue/green deployments (traffic switch) are all examples of dark launches for testing applications in production environments by routing a percentage of the live traffic to selected groups of users without their knowledge. These capabilities do not exist out of the box in a traditional monolithic environment.
Linkerd works with Flagger (https://flagger.app ...
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