[istio introduction, architecture, components]

istio Introduce

Istio It's an open platform , Provide a unified way to integrate microservices , Manage traffic across microservices , Implement strategies and summarize telemetry data .Istio The control panel is on the underlying cluster management platform （ Such as Kubernetes,Mesos etc. ） An abstraction layer is provided on .

form

Envoy - Per microserver Sidecar agent , Handle the services in the cluster and the entry of services to external services / Outlet flow . Agents form a secure microservice grid , Provide rich functions , Such as service discovery , rich 7 Layer routing , Fuse , Policy execution and telemetry records / Reporting function .
Be careful ： Service grid is not overlay The Internet . It simplifies and enhances the way microservices in applications talk to each other through the network provided by the underlying platform .

Mixer - Centralized components used by agents and microservices , Used to execute policies , Such as authentication , Current limiting , The quota , authentication , Request tracking and telemetry collection .

Pilot - The component responsible for configuring the agent at run time .

Citadel - A centralized component responsible for certificate issuance and rotation

Node Agent - Each node component responsible for certificate issuance and rotation

Galley - Used in Istio Verification in China , Ingestion , polymerization , Transform and distribute the central components of the configuration .

istio framework

istio Components