Springcloud Getting Started notes

Registration Center Eureka

1. The service provider registers the service with the registration center
2. Service consumers looking for services through the registration center
3. Make a call after finding the service
4. The customer of the service maintains a heartbeat connection with the service registry, which notifies the service consumer when the address of the service provider is changed
Load Balancing Ribbon

After configuring the service provider address list for ribbion, the Ribbon uses a polling load-balancing algorithm by default, which automatically helps service consumers to request.
Circuit Breaker Hystrix

When a call to a particular service reaches a certain threshold (the default value in Hystrix is 20 failures in 5 seconds), the circuit is turned on and no communication is made. and is performed in an isolated thread.
Declarative Invocation Feign

Feign can help us make it easier and more elegant to invoke the HTTP API service Gateway Zuul

When a client requests a microservices, it goes through Zuul before requesting it, so that some of the business logic similar to validation can be put into Zuul, and the microservices ' own words need to focus on their business logic.
Unified Configuration Config

Configuration changes without rebooting
message bus buses

Configserver is not just a service that provides configuration queries, but is also responsible for sending updates to messages.