Control Plane
This page will introduce you to how the TSB Operator manages the lifecycle of control plane components and what custom resources you can configure and manage using the TSB Operator.
The TSB Operator, configured to manage the lifecycle of the control plane
components, watches for ControlPlane custom resources in the same namespace
where it’s deployed. The default namespace for the control plane is
istio-system. For more information about the custom resource API, refer to the
Control Plane Install API Reference Docs.
Components
These are the types of custom components you can configure and manage using the control plane operator:
| Component | Service | Deployment |
|---|---|---|
| tsbd | tsbd | tsbd |
| istio | Istio-operator-metrics (istiod, vmgateway) | Istio-operator (istiod, vmgateway) (istio-cni-node daemonset in kube-system namespace) |
| zipkin | zipkin | zipkin |
| oap | oap | oap-deployment |
| collector | otel-collector | otel-collector |
The components configured and installed by the operator are:
- tsbd: Responsible for:
- Translating configurations from the management plane into Istio CRDs and saving them to the local cluster
- Pushing cluster information to the management plane
- istio: The open source Istio operator to which the TSB operator delegates the management of open source Istio components.
- oap: Responsible for mesh and envoy gateways RED metrics collection and aggregation
- zipkin: Distributed tracing collector for mesh and envoy gateways
- collector: The Open Telemetry Collector that collects the control plane components’ metrics and exposes them through a Prometheus metrics endpoint.
Istio as TSB component
As described above, the TSB operator responsible for the control plane, installs
the open source Istio operator. Istio and its operator are regarded as part of
the TSB control plane components, under direct control of the TSB operator.
Users do not directly configure Istio. Instead, the interaction with Istio
always happens through the TSB Operator ControlPlane CR.
The TSB operator that manages the control plane creates the IstioOperator CR
called tsb-istiocontrolplane in the control plane’s namespace. The
IstioOperator CR instructs the Istio operator to manage the deployment of the
needed Istio (sub)components. For the TSB control plane, the following
(sub)components are enabled: pilot, cni, ingressGateway.
The TSB ingressGateway (sub)component is a customized configuration of Envoy
which is deployed as vmgateway to support smooth VM integration. Its primary
purpose is to route traffic originating from service mesh onboarded VMs to
services deployed inside the Kubernetes cluster when direct VM to Kubernetes pod
traffic is not possible.
Sidecar proxy versions
Though sidecar proxies technically belong to the data plane, their versions are pinned to the control plane operator version.