Spring
Cloud Gateway
http://gibb.tech
@spencerbgibb
https://slides.com/spencer/spring-cloud-gateway/live
Spring
Cloud Gateway
http://ryanjbaxter.com
@ryanjbaxter
https://slides.com/spencer/spring-cloud-gateway/live
Spring
Cloud Gateway
@spencerbgibb
https://slides.com/spencer/spring-cloud-gateway/live
@sreetummidi
The API Gateway
Is Dead
Long Live The
API Gateway
http://spencer.gibb.us
@spencerbgibb
https://slides.com/spencer/spring-cloud-gateway/live
Spencer Gibb
Ryan Baxter
What is an
API Gateway?
http://microservices.io/patterns/apigateway.html
Server Side
MVC App
Single Page
JS App
or
Mobile App
API Gateway
Product Service
Recommendation Service
User Service
Responsibilities
- Routing
- Surgical Routing
- Canarying
- Resiliency
- Monolith Strangling
- Security
- Monitoring
- Flexibility
Gateway Types
Appliance
SAAS
Web Server
Mesh
Developer-Oriented
Zuul 1
https://www.youtube.com/watch?v=mHHHpxJuTAo
Zuul 2
- https://medium.com/netflix-techblog/zuul-2-the-netflix-journey-to-asynchronous-non-blocking-systems-45947377fb5c
- https://twitter.com/agonigberg/status/914895239042740225
- https://github.com/strangeloop/StrangeLoop2017/blob/master/slides/ArthurGonigberg-ZuulsJourneyToNonBlocking.pdf
Spring Cloud Gateway
Foundations
- Spring 5
- Reactor
- Spring Boot 2
Reactive
Project
Reactor
Non-blocking
Spring WebFlux
- HandlerMapping
- WebFilter
- Predicate
- ServerWebExchange
- PathPatternMatcher/PathMatchInfo
RoutePredicateHandlerMapping
- Plugs into Spring WebFlux HandlerMapping Chain
- Predicates are scoped to a specific Route
-
Loaded from
- Configuration
- Repository
- Java fluent interface
RoutePredicateFactory
- Path
- Host
- Header
- Parameter
- Any request data
FilteringWebHandler
- Modeled after Spring WebFlux
- Uses GatewayFilter
- Filters scoped to specific Route
- Filters can be both 'pre' and 'post'
- GlobalFilter
Filter AAA
Filter BBB
Filter CCC
GatewayFilterFactory
- RewritePath
- {Add|Remove}{Request|Response}Header
- Request RateLimiter
- Hystrix
- Spring Cloud LoadBalancerClient*
- WebSocket*
- Netty Routing*
* (Global Filters)
Benefits
Zuul Filters pre-Finchley
Hystrix+Ribbon+Spring Retry
Simple Filters
public class SetStatusWebFilterFactory implements GatewayFilterFactory {
@Override
public GatewayFilter apply(Config config) {
final HttpStatus status = parse(config.status);
return (exchange, chain) -> chain.filter(exchange)
.then(Mono.fromRunnable(() -> {
setResponseStatus(exchange, httpStatus);
}));
}
}Route Configuration Now: YAML
spring:
cloud:
gateway:
- id: foo_route
uri: lb://foo
predicates:
- Host=**.foo.org
- Path=/headers
- Method=GET
- Header=X-Request-Id, \d+
- Query=foo, ba.
- Query=baz
- Cookie=chocolate, ch.p
- After=1900-01-20T17:42:47.789-07:00[America/Denver]
filters:
- AddRequestHeader=X-Request-Foo, Bar
- AddResponseHeader=X-Response-Foo, Bar
- Hystrix=foo
- SecureHeaders
- RewritePath=/foo/(?<segment>.*), /$\{segment}Route Configuration: Java
@Bean
public RouteLocator customRouteLocator(RouteLocatorBuilder builder,
ThrottleGatewayFilterFactory throttle) {
return builder.routes()
.route(r -> r.host("**.abc.org").and().path("/image/png")
.filters(f -> f.addResponseHeader("X-TestHeader", "foobar"))
.uri("http://httpbin.org:80")
)
.route(r -> r.path("/image/webp")
.filters(f -> f.addResponseHeader("X-AnotherHeader", "baz"))
.uri("http://httpbin.org:80")
)
.route(r -> r.order(-1)
.host("**.throttle.org").and().path("/get")
.filters(f -> f.filter(throttle.apply(1, 1, 10,
TimeUnit.SECONDS)))
.uri("http://httpbin.org:80")
)
.build();
}DEMO
Questions?
@spencerbgibb
http://slides.com/spencer/spring-cloud-gateway
https://github.com/spring-cloud/spring-cloud-gateway
https://github.com/spring-cloud-samples/spring-cloud-gateway-sample
Questions?
@ryanjbaxter
http://slides.com/spencer/spring-cloud-gateway
https://github.com/spring-cloud/spring-cloud-gateway
https://github.com/spring-cloud-samples/spring-cloud-gateway-sample
Spring Cloud Gateway
By Spencer Gibb
