Google App Engine-日志消息不可见

Question

I have a Spring boot application deployed to GCP App Engine with logback as a logging framework. The problem which I am facing is that I can not find the logger messages which I put into my code. I found a similar post: Google App Engine - Can not find my logging messages . But it is pretty much older and the solutions are not working anymore. On this post, it is mentioned to set the logger level manually. On a similar line, I used logging.properties file to set the level as INFO. But still, it was of no use.

I thought the issue might be with the file permission on the App Engine. So, I specified the log file location at /tmp having full read-write permissions. It did not work. If there are any exception scenarios then stack traces are visible on Stackdriver Logging. Please suggest.

Answer 1

Here is how I managed to make the logs appear in Stackdriver under java.log .

I created a file myApp/src/main/resources/logback.xml and added this configuration:

<configuration>
  <appender name="STDOUT" class="com.google.cloud.logging.logback.LoggingAppender">
  </appender>

  <root level="info">
          <appender-ref ref="STDOUT"/>    
  </root>
</configuration>

I also added the dependency in the file myApp/pom.xml :

<dependencies>

    <dependency>
      <groupId>com.google.cloud</groupId>
      <artifactId>google-cloud-logging-logback</artifactId>
      <version>0.80.0-alpha</version>
    </dependency>

    <!-- other dependencies -->

</dependencies>

Then in my main.java I did logger.info("my info log") and logger.error("my error log") and the logs appeared in Stackdriver after a few seconds of accessing my web app.

I took the sample code from the GoogleCloudPlatform/getting-started-java repository to deploy my app.