GKE & Stackdriver: Java logback logging format?

Question

I have a project running Java in a docker image on Kubernetes. Logs are automatically ingested by the fluentd agent and end up in Stackdriver.

However, the format of

Answer 1

Google has provided a logback appender for Stackdriver, I have enhanced it abit to include the thread name in the logging label, so that it can be searched more easily.

pom.xml

        com.google.cloud
        google-cloud-logging-logback
        0.116.0-alpha
    

logback-spring.xml

    
    
        clicktrade.log
        com.jimmy.clicktrade.arch.CommonEnhancer
        WARN
    
    
        
    

CommonEnhancer.java

    public class CommonEnhancer implements LoggingEventEnhancer {

    @Override
    public void enhanceLogEntry(Builder builder, ILoggingEvent e) {
        builder.addLabel("thread", e.getThreadName());
    }

}

Surprisingly, the logback appender in MVN repository doesn't align with the github repo source code. I need to dig into the JAR source code for that. The latest version is 0.116.0-alpha, it seems it has version 0.120 in Github

https://github.com/googleapis/google-cloud-java/tree/master/google-cloud-clients/google-cloud-contrib/google-cloud-logging-logback