You want a Google-managed scheduling service for open-source workflow pipelines on GKE that supports Shared VPC. Where should Cloud Composer resources be placed?

Cloud Composer is Google's managed Apache Airflow service, ideal for orchestrating open-source workflow pipelines on GKE. When using Shared VPC, Cloud Composer resources should be placed in the service project. This allows the Composer environment to access resources (like GKE clusters) in the Shared VPC network, which is defined in the host project. Placing Composer in the service project aligns with the principle of separating application-specific resources from network infrastructure. Dataflow is a processing engine, not a scheduling service, and Cloud Run triggers or shell scripts are not Google-managed scheduling services for complex workflows like Composer.