Migrate to Cloud Run for seamless application staging and promotion

D.

The scenario described in this question requires a cloud-based solution that can provide easy staging of new application versions in the production environment and also allow outsourced operations team to autonomously promote staged versions to production, while minimizing operational overhead.

Out of the four Google Cloud products mentioned as options, Google Kubernetes Engine (GKE) would be the best choice to migrate to in this scenario.

GKE is a managed Kubernetes service provided by Google Cloud, which offers a highly scalable, flexible, and reliable container orchestration platform. Kubernetes is an open-source container orchestration tool that automates the deployment, scaling, and management of containerized applications. GKE provides a fully managed Kubernetes environment that can be easily used to deploy and manage containerized applications on the cloud.

With GKE, developers can easily stage new versions of their applications by creating new container images and deploying them to the GKE cluster. This can be done using standard tools and workflows that are already familiar to developers, such as Kubernetes manifests, Helm charts, or YAML files.

Once the new version is staged, the outsourced operations team can autonomously promote it to production using Kubernetes features such as rolling updates, canary deployments, or blue-green deployments. This allows for a smooth and controlled transition from staging to production, while minimizing downtime and ensuring that the application remains available and responsive to users.

Furthermore, GKE provides a range of built-in features and integrations that can help minimize the operational overhead of the solution. For example, GKE offers automatic scaling, load balancing, and self-healing capabilities, which can help ensure that the application is always available and responsive to users. GKE also integrates with other Google Cloud products, such as Cloud Logging, Cloud Monitoring, and Cloud Trace, which can help provide visibility into the application's performance and troubleshoot issues.

In summary, Google Kubernetes Engine (GKE) is the best Google Cloud product to migrate to in this scenario, as it provides a highly scalable, flexible, and reliable container orchestration platform that can be easily used to stage and deploy new versions of the application to production, while minimizing operational overhead.