Follow these steps to implement custom format for FlexDeploy logs in Tomcat. All necessary files should be available in Tomcat_Complete.zip.

Copy Tomcat_Complete.zip/apache-tomcat-flexdeploy/bin/FDLogFormatter.jar to <Tomcat Home>/bin folder.
For Windows
- Update <Tomcat Home>/bin/setenv.bat file, add following on first line.
```
set CLASSPATH=%CLASSPATH%;%CATALINA_HOME%\bin\FDLogFormatter.jar
```
For Linux
- Update <Tomcat Home/bin/setenv.sh file, add following on first line.
```
export CLASSPATH=$CLASSPATH:$CATALINA_HOME/bin/FDLogFormatter.jar
```
Copy Tomcat_Complete.zip/apache-tomcat-flexdeploy/conf/logging.properties file to <Tomcat Home>/conf folder. You should take back up of existing logging.properties file. This is configured to have 10 backups each 10MB, you can adjust it as appropriate.