Logback and Spring Boot - Change Log Level to custom format

Thu, 19 Aug 2021 00:00:00 +0200

Create a custom converter

This class converts the well known log levels to a custom format

CustomLogLevelConverter.java

package com.hascode;

public class CustomLogLevelConverter extends ClassicConverter {
    @Override
    public String convert(ILoggingEvent event) {
        switch (event.getLevel().toInt()) {
            case Level.ERROR_INT:
                return "ERROR!!!";
            case Level.WARN_INT:
                return "WARN!!";
            case Level.INFO_INT:
                return "INFO!";
            case Level.TRACE_INT:
                return "DEBUG";
            default:
                return event.getLevel().toString();
        }
    }
}

Register the converter

The following Logback config includes some defaults and registers our custom converter.

Java Snippets

Mon, 01 Mar 2010 00:00:00 +0100

Remote Debug a Pod’s Java Process

Simple steps for remote debugging a Java process running on a k8 pod:

Edit deployment and add the following parameters to the Java start line: -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=127.0.0.1:5005

Also add the following port mapping at the section container → ports in the deployment:
```
- containerPort: 5005
  protocol: TCP
```
Safe, wait for the new pods and then add a port forward for port 5005 for this pod:
```
kubectl port-forward podname 5005
```

Logback on Micha Kops' Tech Notes

Logback and Spring Boot - Change Log Level to custom format

Create a custom converter

Register the converter

Java Snippets

Remote Debug a Pod’s Java Process