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The Apigee hybrid runtime plane is made up of a variety of services. Each service is deployedon nodes within your Kubernetes cluster, and each one can be configured using theoverrides.yaml file.

Runtime architectural diagram

The following image shows how each of the runtime services interacts with other services in hybrid:

The following table summarizes the runtime services:

Service	Description	Configuration Object	Implemented As	Scope
Cassandra	Acts as a runtime datastore that provides Apigee local persistent storage for KMS, OAuth, KVMs, and caching for the runtime plane. You can have separate Cassandra rings for KMS, OAuth, KVMs, and caching.	cassandra	StatefulSet	Organization (one or more orgs)
Default Istio Ingress/LoadBalancer	Manages inbound requests from client apps. The default installation uses an Istio Ingress, but you are responsible for managing your own custom Ingress configuration for production traffic.	ingress	Ingress	Cluster (one or more organizations in the same cluster)
Logger	Extracts log files and sends the data to the monitoring application associated with your GCP account (currently Stackdriver).	logger	DaemonSet	Cluster (one or more organizations in the same cluster)
Management API for Runtime data (MART)	Exposes an endpoint to administer data entities on the runtime plane, such as KMS (API keys and OAuth tokens), quotas, KVMs, and API products. MART services are scoped to a single organization.	mart	Deployment	Organization
MART Istio Ingress	Manages inbound requests from the management plane for calls to theApigee APIs.	ingress	Ingress	Cluster (one or more organizations in the same cluster)
Message Processor	Consumes rolling updates from the management plane to provide API request processing and policy execution on the runtime plane. Each Message Processor is scoped to a single environment.	runtime	Deployment	Environment
Metrics	Collects operations metrics that you can use to monitor the health of hybrid services, to set up alerts, and so on.	metrics	Deployment	Cluster (one or more organizations in the same cluster)
Synchronizer	Fetches configuration data about an API environment from the management plane to the runtime plane. A Synchronizer can poll one or more environments in the same or different organizations.	synchronizer	Deployment	Environment
Universal Data Collection Agent (UDCA)	Extracts analytics and deployment status data and sends it to the UAP service in the management plane so that you can access it with the management UI.	udca	Deployment	Environment
Cert Manager	A certificate manager for Kubernetes implementations used by Apigee.	cert-manager	Deployment	Kubernetes cluster
Apigee Operators	Apigee Operators (AO) creates and updates low level Kubernetes and Istio resources that are required to deploy and maintain the ApigeeDeployment (AD) configuration. For example, the controller carries out the release of message processors and validates the AD configuration before making it persistent in Kubernetes cluster.	ao	Deployment	Kubernetes cluster
Istio Control Plane Components	Istio is a service mesh that layers onto your existing Apigee instance helping it integrate with the logging platform, telemetry and policy system.	istio	Ingress	System

Most services make socket connections with other internal or external services that you should beaware of. For more information, seeHybrid ports.