Continuous Delivery with Docker and Jenkins

Canary release

Canary releasing is a technique to reduce the risk associated with introducing a new version of the software. Similar to blue-green deployment, it uses two identical environments, as presented in the following figure:

Also, similar to the blue-green deployment technique, the release process starts by deploying a new version in the environment that is currently unused. Here, however, the similarities end. The load balancer, instead of switching to the new environment, is set to link only a selected group of users to the new environment. All the rest still use the old version. This way, a new version can be tested by some users ...