Spring logging configuration with custom properties

Question

I have to configure logging for a Spring Boot application, but I don't know how I could use custom properties and JVM options in logback-spring.xml.

Let's say I have the following properties:

• application.properties: logging.app.name=app
• JVM options: -Dlogging.app.version=1.0
• (additionally I need active profile and hostname)

Then the filename and log entry should be the following:

• app-[HOSTNAME].log
• 2017/08/25 01:02:03.456 INFO app/1.0/[PROFILE] [main] Some log...

As I know I cannot simply access to these properties in my logging configuration (spring-logback.xml). That's why I tried to create these beans (ConsoleAppender, RollingFileAppender) manually in a configuration class, but it didn't work for me. I also tried implementing the afterPropertiesSet method of InitializingBean and put these variables manually for Logback, but this didn't help either and I start running out of ideas. So any help is really appreciated!

Answer 1

Try to run app with this configurations where you can define the path to application.properties and also provide the logback configuration file.

$java -jar /{pathToJar}/myApp.jar 
--spring.config.location=/{pathToFolderWithCustomeProperties}/application.properties 
--logging.config=/{path}/logback.xml 
-Dlogback.configurationFile=/{path}/logback.xml