[1] Using this method of software deployment offers the ability to quickly roll back to a previous state if anything goes wrong.
[5] This naming convention was adopted while working on the original Continuous delivery book published in 2010 [6] and became a common term in the industry afterwards.
Blue–green deployment is widely recognized for its ability to reduce downtime during application updates and minimize the risk of introducing defects into production environments.
This method enables quick rollback in case of deployment failure, thus improving overall system resilience and user experience.
Furthermore, complex database migrations may pose challenges, as the system must ensure that both the blue and green environments have consistent data.
AWS CodeDeploy also allows the use of lifecycle event hooks, enabling developers to run tests and verification steps before routing traffic to the green environment.
[9] Setting up the environment:[10] Cloning the sample repository:[10]To modify the configuration, navigate to the configuration file (e.g., infra/main.tfvars) and update the environment from blue to green:[10]Adding, committing, and pushing your changes to trigger the deployment:[10]Example of how the main.tfvars file might look like:[10]Azure Container Apps provides blue–green deployment capabilities by using container app revisions, traffic weights, and revision labels.
If any issues arise in the green environment, a rollback is easily executed, routing traffic back to the blue revision.