Skip to content

Latest commit

 

History

History
37 lines (24 loc) · 1.28 KB

server.md

File metadata and controls

37 lines (24 loc) · 1.28 KB
Raw

Server

In Gateway, a server refers to a real backend server.

Server Attributes

ID

Unique Identifier

Addr

Format: "IP:PORT"

Protocol

API Protocol. Currently only support HTTP

Weight

Valid only if the load balance strategy is Weighted Round Robin

MaxQPS

Maximum QPS supported by server. Used to Control Traffic. Gateway uses the Token Bucket Algorithm, restricting traffic by MaxQPS, thus protecting backend servers from overload.

HealthCheck (Optional)

Health check mechanism, currently supporting HTTP check, response status code and response body. If not set, the server's health check becomes external responsibility and Gateway always assumes that this server is healthy.

CircuitBreaker (Optional)

Backend server circuit break status:

  • Open

    Normal. All traffic in. When Gateway find the failed requests to all requests ratio reach a certain threshold, CircuitBreaker switches from Open to Close.

  • Half

    Attempt to recover. Gateway tries to direct a certain percentage of traffic to the server and observe the result. If the expectation is met, CircuitBreaker switches to Open. If not, Close.

  • Close

    Gateway does not direct any traffic to this backend server. When the time threshold is reached, Gateway automatically tries to recover by switching to Half.