How to change Flink's log directory

I understand Flink uses log4j to manage log. So I change log setting in log4j.property, where I set the output location. However, when I start job master, it says that the log location is changed, not the default location. So how could I change the log location of Flink gracefully?

Where are Flink logs stored?

log. dir defines the directory where the Flink logs are saved. It has to be an absolute path. Log location: the logs are local, i.e. they are produced in the machine(s) running the JobManager(s) / Taskmanager(s).

Does Flink use Log4j?

Flink ships with the Log4j API bridge, allowing existing applications that work against Log4j1 classes to continue working.

The default lib directory is set via bin/config.sh. Look for FLINK_LOG_DIR. You can just update the script to change the default log directory.