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API / APIGEE Gateway Interview Questions

What is the Apigee hybrid architecture in more depth, including its components?

Apigee hybrid splits responsibilities between Google-managed and customer-managed infrastructure. Understanding the component split is important for architects and operations engineers.

Apigee hybrid component split
ComponentWhere it runsManaged by
Management Plane (UI, API, analytics ingestion)Google CloudGoogle
Apigee ConnectCustomer's Kubernetes clusterCustomer (installed by Google tooling)
Message Processor (proxy runtime)Customer's Kubernetes clusterCustomer (installed by Helm/Apigee Operator)
Cassandra (config/KVM storage)Customer's Kubernetes clusterCustomer
Mart (API metadata service)Customer's Kubernetes clusterCustomer
SynchroniserCustomer's Kubernetes clusterCustomer - syncs config from management plane
UDCA (Universal Data Collection Agent)Customer's Kubernetes clusterCustomer - ships analytics to Google
# Apigee hybrid installation summary (Kubernetes-based)

# Prerequisites:
# - GKE (or any CNCF-certified Kubernetes cluster)
# - cert-manager installed
# - Anthos Service Mesh (optional but recommended)

# Install via Apigee Operator (Helm chart):
helm install apigee-operator \
  oci://us-docker.pkg.dev/apigee-release/apigee-operators/apigee-operators \
  --namespace apigee-system

# Apply the ApigeeOrganization and ApigeeEnvironment CRDs:
kubectl apply -f apigee-org.yaml
kubectl apply -f apigee-env.yaml

# Key hybrid release (mid-2026):
# Apigee hybrid v1.14.6 (released June 16, 2026)
# Apigee instance runtime 1-17-0-apigee-9

The Synchroniser is a critical component that periodically polls the management plane and downloads the latest proxy configurations, KVM values, and product definitions to the runtime cluster. If the synchroniser loses connectivity, the runtime continues serving traffic with the last-known configuration.

What is the role of the Synchroniser component in Apigee hybrid?
What happens to Apigee hybrid runtime traffic if connectivity between the runtime cluster and Google's management plane is temporarily lost?

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