I am having an containerised application with 1 container. In that container I have multiple pods.

For simplicity let’s take 3 pods. POD1 (with pod id as pd1), POD2 (pd2), POD3 (pd3)

In the log4j.yml file I have configured the app log files as:
fileName: "logs/app.log"

What it do is it generates app.log file in every instance of the pod in that container.

• POD1 -> in logs directory app.log is present
• POD2 -> in logs directory app.log is present
• POD3 -> in logs directory app.log is present

But I want the files to be like:

• POD1 -> in logs directory we should have app_pd1.log
• POD2 -> in logs directory we should have app_pd2.log
• POD3 -> in logs directory we should have app_pd3.log

What I tried:

As mentioned in Log4j Kubernetes Support

I tried fileName: "logs/app_${k8s:podId}.log"

But it didn’t worked, The file was made with static name as app_${k8s:podId}.log in all the pods.