如何让Javamelody使用不同的端口（Spring Boot+暴露的两个HTTP端口）

Question

我有 Spring Boot Web 应用程序。它在端口 8080 上公开 REST API。它还使用 Spring Boot 管理端点 (http://docs.spring.io/spring-boot/docs/current/reference/html/production-ready-monitoring.html) 公开管理端口 8081。 我没有任何自定义 Tomcat 配置来实现这一点。我的application.properties 文件中只有属性management.port=8081。

我已按照中所述配置了 JavaMelody https://github.com/javamelody/javamelody/wiki/UserGuideAdvanced#spring-boot-app （我有我的自定义JavaMelodyConfiguration 类，其中org.springframework.boot.web.servlet.FilterRegistrationBean 注册net.bull.javamelody.MonitoringFilter）。

@Bean
    public FilterRegistrationBean javaMelody() {
        final FilterRegistrationBean javaMelody = new FilterRegistrationBean();
        javaMelody.setFilter(new MonitoringFilter());
        javaMelody.setAsyncSupported(true);
        javaMelody.setDispatcherTypes(DispatcherType.REQUEST, DispatcherType.ASYNC);
        javaMelody.addUrlPatterns("/*");
        return javaMelody;
    }

通过这种配置，Javamelody 暴露在 8080 端口（业务端口）上。我想把它移到 8081（管理端口）。怎么改？

我使用 Spring Boot 1.4.2.RELEASE，javamelody 1.62.0

Answer 1

编辑：此答案仍然正确，但请参阅已接受的答案以获得更简单的解决方案。

EmbeddedTomcatConfiguration.java

package ...

import java.util.ArrayList;
import java.util.List;

import org.apache.catalina.connector.Connector;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.embedded.EmbeddedServletContainerFactory;
import org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class EmbeddedTomcatConfiguration {

    @Value("${server.additionalPorts}")
    private String additionalPorts;

    @Bean
    public EmbeddedServletContainerFactory servletContainer() {
        TomcatEmbeddedServletContainerFactory tomcat = new TomcatEmbeddedServletContainerFactory();
        Connector[] additionalConnectors = this.additionalConnector();
        if (additionalConnectors != null && additionalConnectors.length > 0) {
            tomcat.addAdditionalTomcatConnectors(additionalConnectors);
        }
        return tomcat;
    }

    private Connector[] additionalConnector() {
        if (StringUtils.isBlank(this.additionalPorts)) {
            return null;
        }
        String[] ports = this.additionalPorts.split(",");
        List<Connector> result = new ArrayList<>();
        for (String port : ports) {
            Connector connector = new Connector("org.apache.coyote.http11.Http11NioProtocol");
            connector.setScheme("http");
            connector.setPort(Integer.valueOf(port));
            result.add(connector);
        }
        return result.toArray(new Connector[] {});
    }
}

application.yml

server:
  port: ${appPort:8800}
  additionalPorts: 8880,8881

Application.java

@SpringBootApplication
@ComponentScan(...)
@Import(EmbeddedTomcatConfiguration.class)
public Application {

    public static void main(String[] args) {
        SpringApplication.run(Application .class, args);
    }
}

我对限制从特定端口访问 javamelody 的建议是扩展 javamelody 过滤器，如果请求来自特定端口，则只链接请求，否则返回 404。

来自日志：

INFO  TomcatEmbeddedServletContainer:185 - Tomcat started on port(s): 8800 (http) 8880 (http) 8881 (http)

顺便说一句，这种方法会在这些端口上公开其他端点。 为了解决这个问题并将 javamelody 过滤器（/monitoring）限制到特定端口，您需要编写一个过滤器来验证从允许端口请求的路径（servlet 和过滤器路径），记住这些过滤器的顺序很重要。

基于这个答案和我在回答这个问题时已经获得的部分源代码，我在http://tech.asimio.net/2016/12/15/Configuring-Tomcat-to-Listen-on-Multiple-ports-using-Spring-Boot.html发布了一篇关于这个主题的博客文章

Answer 2

如果目标是从 java melody 版本 1.76 开始公开对管理端口的监控现在要简单得多。

您需要 Spring Boot 2.x、执行器以及 yml 或属性文件：

• management.server.port：{您的自定义端口}
• management.endpoints.web.exposure.include：{你通常想要什么}，监控
• javamelody.management-endpoint-monitoring-enabled: true

在此处查看更多详细信息： https://github.com/javamelody/javamelody/wiki/SpringBootStarter#configuration-in-case-of-management-port

Answer 3

您可以通过 MvcEndpoint 使用 ReportServlet。像这样的：

    import net.bull.javamelody.MonitoringFilter;
    import net.bull.javamelody.ReportServlet;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.boot.actuate.endpoint.Endpoint;
    import org.springframework.boot.actuate.endpoint.mvc.MvcEndpoint;
    import org.springframework.boot.web.servlet.FilterRegistrationBean;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.web.bind.annotation.GetMapping;

    import javax.servlet.ServletConfig;
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import java.io.IOException;

    /**
     * We configure the Java Melody {@link MonitoringFilter} normally, but disables all access to the UI. Instead,
     * we create a {@link ReportServlet}, and expose it through a {@link MvcEndpoint} in {@link #javaMelodyReportEndpoint()}.
     */
    @Configuration
    public class JavaMelodyConfiguration {

        private final ServletConfig servletConfig;

        @Autowired
        public JavaMelodyConfiguration(ServletConfig servletConfig) {
            this.servletConfig = servletConfig;
        }

        @Bean
        MvcEndpoint javaMelodyReportEndpoint() {
            ReportServlet reportServlet = new ReportServlet();
            // We initialize the servlet with the servlet configuration from the server that runs on server.port, as
            // it currently only uses it to access the Collector instance, and some system information.
            reportServlet.init(servletConfig);

            return new MvcEndpoint() {
                @Override
                public String getPath() {
                    return "/monitoring";
                }

                @Override
                public boolean isSensitive() {
                    return false;
                }

                @Override
                public Class<? extends Endpoint> getEndpointType() {
                    return null;
                }

                @GetMapping
                public void report(HttpServletRequest httpRequest, HttpServletResponse httpResponse) throws ServletException, IOException {
                    reportServlet.service(httpRequest, httpResponse);
                }
            };
        }

        @Bean
        FilterRegistrationBean javaMelodyFilterRegistration() {
            FilterRegistrationBean javaMelody = new FilterRegistrationBean();
            javaMelody.setFilter(monitoringFilter());
            javaMelody.setName("javamelody");
            return javaMelody;
        }

        @Bean
        MonitoringFilter monitoringFilter() {
            return new MonitoringFilter() {
                @Override
                protected boolean isAllowed(HttpServletRequest httpRequest, HttpServletResponse httpResponse) throws IOException {
                    // We allow no access to the report (/monitoring) from this filter, access is done through the
                    // MvcEndpoint above, using the management port.
                    return false;
                }
            };
        }
    }

（我也在这里发布了这个：https://github.com/javamelody/javamelody/issues/601）