Cloud Foundry 支持

Spring Boot 的 actuator 模块包含在您部署到兼容的 Cloud Foundry 实例时激活的额外支持。/cloudfoundryapplication 路径为所有 @Endpoint bean 提供了替代的安全路由。

扩展支持允许 Cloud Foundry 管理 UI（例如，您可以用来查看已部署应用程序的 Web 应用程序）通过 Spring Boot Actuator 信息进行增强。例如，应用程序状态页面可以包含完整的健康信息，而不是典型的“运行”或“停止”状态。

/cloudfoundryapplication 路径对普通用户不可直接访问。要使用该端点，您必须在请求中传递有效的 UAA 令牌。

禁用扩展的 Cloud Foundry Actuator 支持

如果您想完全禁用 /cloudfoundryapplication 端点，您可以在 application.properties 文件中添加以下设置

  • 属性

  • YAML

management.cloudfoundry.enabled=false
management:
  cloudfoundry:
    enabled: false

Cloud Foundry 自签名证书

默认情况下，/cloudfoundryapplication 端点的安全验证会对各种 Cloud Foundry 服务进行 SSL 调用。如果您的 Cloud Foundry UAA 或 Cloud Controller 服务使用自签名证书，您需要设置以下属性

  • 属性

  • YAML

management.cloudfoundry.skip-ssl-validation=true
management:
  cloudfoundry:
    skip-ssl-validation: true

自定义上下文路径

如果服务器的上下文路径已配置为除 / 之外的任何内容，则 Cloud Foundry 端点在应用程序的根目录不可用。例如，如果 server.servlet.context-path=/app，则 Cloud Foundry 端点在 /app/cloudfoundryapplication/* 可用。

如果您希望 Cloud Foundry 端点始终在 /cloudfoundryapplication/* 可用，无论服务器的上下文路径如何，您都需要在应用程序中显式配置它。配置因使用的 Web 服务器而异。对于 Tomcat，您可以添加以下配置

  • Java

  • Kotlin

import java.io.IOException;
import java.util.Collections;

import jakarta.servlet.GenericServlet;
import jakarta.servlet.Servlet;
import jakarta.servlet.ServletContainerInitializer;
import jakarta.servlet.ServletContext;
import jakarta.servlet.ServletException;
import jakarta.servlet.ServletRequest;
import jakarta.servlet.ServletResponse;
import org.apache.catalina.Host;
import org.apache.catalina.core.StandardContext;
import org.apache.catalina.startup.Tomcat;

import org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory;
import org.springframework.boot.web.servlet.ServletContextInitializer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration(proxyBeanMethods = false)
public class MyCloudFoundryConfiguration {

	@Bean
	public TomcatServletWebServerFactory servletWebServerFactory() {
		return new TomcatServletWebServerFactory() {

			@Override
			protected void prepareContext(Host host, ServletContextInitializer[] initializers) {
				super.prepareContext(host, initializers);
				StandardContext child = new StandardContext();
				child.addLifecycleListener(new Tomcat.FixContextListener());
				child.setPath("/cloudfoundryapplication");
				ServletContainerInitializer initializer = getServletContextInitializer(getContextPath());
				child.addServletContainerInitializer(initializer, Collections.emptySet());
				child.setCrossContext(true);
				host.addChild(child);
			}

		};
	}

	private ServletContainerInitializer getServletContextInitializer(String contextPath) {
		return (classes, context) -> {
			Servlet servlet = new GenericServlet() {

				@Override
				public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException {
					ServletContext context = req.getServletContext().getContext(contextPath);
					context.getRequestDispatcher("/cloudfoundryapplication").forward(req, res);
				}

			};
			context.addServlet("cloudfoundry", servlet).addMapping("/*");
		};
	}

}
import jakarta.servlet.GenericServlet
import jakarta.servlet.Servlet
import jakarta.servlet.ServletContainerInitializer
import jakarta.servlet.ServletContext
import jakarta.servlet.ServletException
import jakarta.servlet.ServletRequest
import jakarta.servlet.ServletResponse
import org.apache.catalina.Host
import org.apache.catalina.core.StandardContext
import org.apache.catalina.startup.Tomcat.FixContextListener
import org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory
import org.springframework.boot.web.servlet.ServletContextInitializer
import org.springframework.context.annotation.Bean
import org.springframework.context.annotation.Configuration
import java.io.IOException
import java.util.Collections.emptySet

@Configuration(proxyBeanMethods = false)
class MyCloudFoundryConfiguration {

	@Bean
	fun servletWebServerFactory(): TomcatServletWebServerFactory {
		return object : TomcatServletWebServerFactory() {

			override fun prepareContext(host: Host, initializers: Array<ServletContextInitializer>) {
				super.prepareContext(host, initializers)
				val child = StandardContext()
				child.addLifecycleListener(FixContextListener())
				child.path = "/cloudfoundryapplication"
				val initializer = getServletContextInitializer(contextPath)
				child.addServletContainerInitializer(initializer, emptySet())
				child.crossContext = true
				host.addChild(child)
			}

		}
	}

	private fun getServletContextInitializer(contextPath: String): ServletContainerInitializer {
		return ServletContainerInitializer { classes: Set<Class<*>?>?, context: ServletContext ->
			val servlet: Servlet = object : GenericServlet() {

				@Throws(ServletException::class, IOException::class)
				override fun service(req: ServletRequest, res: ServletResponse) {
					val servletContext = req.servletContext.getContext(contextPath)
					servletContext.getRequestDispatcher("/cloudfoundryapplication").forward(req, res)
				}

			}
			context.addServlet("cloudfoundry", servlet).addMapping("/*")
		}
	}
}

如果您使用的是基于 Webflux 的应用程序，您可以使用以下配置

  • Java

  • Kotlin

import java.util.Map;

import reactor.core.publisher.Mono;

import org.springframework.boot.autoconfigure.web.reactive.WebFluxProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.server.reactive.ContextPathCompositeHandler;
import org.springframework.http.server.reactive.HttpHandler;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.web.server.adapter.WebHttpHandlerBuilder;

@Configuration(proxyBeanMethods = false)
@EnableConfigurationProperties(WebFluxProperties.class)
public class MyReactiveCloudFoundryConfiguration {

	@Bean
	public HttpHandler httpHandler(ApplicationContext applicationContext, WebFluxProperties properties) {
		HttpHandler httpHandler = WebHttpHandlerBuilder.applicationContext(applicationContext).build();
		return new CloudFoundryHttpHandler(properties.getBasePath(), httpHandler);
	}

	private static final class CloudFoundryHttpHandler implements HttpHandler {

		private final HttpHandler delegate;

		private final ContextPathCompositeHandler contextPathDelegate;

		private CloudFoundryHttpHandler(String basePath, HttpHandler delegate) {
			this.delegate = delegate;
			this.contextPathDelegate = new ContextPathCompositeHandler(Map.of(basePath, delegate));
		}

		@Override
		public Mono<Void> handle(ServerHttpRequest request, ServerHttpResponse response) {
			// Remove underlying context path first (e.g. Servlet container)
			String path = request.getPath().pathWithinApplication().value();
			if (path.startsWith("/cloudfoundryapplication")) {
				return this.delegate.handle(request, response);
			}
			else {
				return this.contextPathDelegate.handle(request, response);
			}
		}

	}

}
import org.springframework.boot.autoconfigure.web.reactive.WebFluxProperties
import org.springframework.boot.context.properties.EnableConfigurationProperties
import org.springframework.context.ApplicationContext
import org.springframework.context.annotation.Bean
import org.springframework.context.annotation.Configuration
import org.springframework.http.server.reactive.ContextPathCompositeHandler
import org.springframework.http.server.reactive.HttpHandler
import org.springframework.http.server.reactive.ServerHttpRequest
import org.springframework.http.server.reactive.ServerHttpResponse
import org.springframework.web.server.adapter.WebHttpHandlerBuilder
import reactor.core.publisher.Mono

@Configuration(proxyBeanMethods = false)
@EnableConfigurationProperties(WebFluxProperties::class)
class MyReactiveCloudFoundryConfiguration {

	@Bean
	fun httpHandler(applicationContext: ApplicationContext, properties: WebFluxProperties): HttpHandler {
		val httpHandler = WebHttpHandlerBuilder.applicationContext(applicationContext).build()
		return CloudFoundryHttpHandler(properties.basePath, httpHandler)
	}

	private class CloudFoundryHttpHandler(basePath: String, private val delegate: HttpHandler) : HttpHandler {
		private val contextPathDelegate = ContextPathCompositeHandler(mapOf(basePath to delegate))

		override fun handle(request: ServerHttpRequest, response: ServerHttpResponse): Mono<Void> {
			// Remove underlying context path first (e.g. Servlet container)
			val path = request.path.pathWithinApplication().value()
			return if (path.startsWith("/cloudfoundryapplication")) {
				delegate.handle(request, response)
			} else {
				contextPathDelegate.handle(request, response)
			}
		}
	}
}