Blue-green deployment in Azure Functions

There are multiple deployment patterns in DevOps: canary deployment and blue green deployments. We will be talking about blue green deployment for Azure Functions in this book. Blue green deployment technique reduces the downtime and risk by having two identical production environments with the names blue and green. One environment will go live whilst the other is used for staging new changes. And there is workflow designed to switch between live and staging. Initially, a new version of the application is deployed to the blue environment with all the user traffic being redirected to the blue environment. After the next version of application has been developed, it is deployed to a staging environment (green) for testing. After the testing of the new version of the software is considered satisfactory, then all the traffic is redirected to the green environment and is considered as live.