For clarification, "canary" in this article refers to rolling out a new release to some small subset of production traffic, a la canary release (eg https://mart

For clarification, "canary" in this article refers to rolling out a new release to some small subset of production traffic, a la canary release (eg https://martinfowler.com/bliki/CanaryRelease.html https://martinfowler.com/bliki/CanaryRelease.html). At least a few other people in the comments are saying that in their experience, "canaries" are black-box monitoring programs that simulate critical user journeys. This is not what this article is discussing.