You need to ensure idempotent deployments of your infrastructure in GCP. Which service allows you to declaratively define your infrastructure and automatically handle dependencies, ensuring that resources are created or modified in the correct order?

Deployment Manager is Google Cloud's infrastructure as code service, allowing you to define and manage GCP resources declaratively using YAML or Python templates. Its idempotent nature means that applying the same configuration multiple times will result in the same infrastructure state, making it ideal for consistent deployments and preventing unintended changes. It automatically handles resource dependencies, ensuring resources are created or updated in the correct order. Cloud Endpoints with gRPC is for API management. Cloud Pub/Sub with Dataflow is for messaging and data processing. GKE with CustomResourceDefinitions is for extending Kubernetes, not general GCP infrastructure. Cloud Scheduler with App Engine Tasks is for scheduling jobs.