Spring Cloud Gateway: Reactor Netty access logs

To enable Reactor Netty access logging, set -Dreactor.netty.http.server.accessLogEnabled=true.

Reactor Netty is the underlying network communication library used by Spring Cloud Gateway, which provides an access log function to record details of HTTP requests and responses. By setting the system property reactor.netty.http.server.accessLogEnabled to true, you can enable the Reactor Netty access log feature, which records access logs for each request.

Enabling access logs can help you monitor and analyze application network traffic, including request source, destination address, request method, response status code and other information. This is useful for troubleshooting, performance analysis, and security auditing. After ensuring that the correct access log configuration is set, you will be able to obtain detailed request logs for proper analysis and monitoring.

Note that this is a system-level property, so you need to set it to true on application startup to enable Reactor Netty access logging throughout the application's lifetime.

Important: This must be a Java system property, not a Spring Boot property.

You can configure the logging system to have separate access log files. The following example creates a Logback configuration:

logback.xml

    <appender name="accessLog" class="ch.qos.logback.core.FileAppender">
        <file>access_log.log</file>
        <encoder>
            <pattern>%msg%n</pattern>
        </encoder>
    </appen