How to read spring boot application.yml properties in log4j2.yml

Question

I want to read log path from application.yml and use is in log4j2.yml Is this possible? If yes, how?

example:

application.yml

log:
  Path: logs/app.log

log4j2.yml

RollingFile:
  name: LogToRollingFile
  fileName: ${log.path}

Answer 1

Use Log4j 2.13.0 or 2.13.1. It contains a log4j-spring-cloud-config-client jar. Include that in your application. Once you do that you can use the Spring Lookup to include properties from your application.yml in log4j2.xml. this example from Logging in the Cloud shows how to used the Spring, Docker, and Kubernetes Lookups.