Is it possible to log the server IP address by using log4j2?

Question

I have log4j2.properties file which is used for the application log. Now by using that properties file I need to print the hostname/ip address to the output log file. I do not want to modify application code(java class) for this.

Answer 1

If you want to print server host name in your web application, then include ${hostName} in your layout pattern.

For log4j2 properties configuration , below pattern should print hostname of the server -

appender.rolling.layout.pattern = %d{yyyy-MM-dd HH:mm:ss.SSS} ${hostName} %level [%t] [%c] [%M] [%l] - %msg%n