MAC address in the log format

[jotauses]

Currently the formats are declared using JSON or YAML, but I need to pass a variable, specifically the MAC of the machine. How could I insert a variable into the formatter?

[Dragon2fly]

Hi @jotauses

Assume that you add %(MAC)s into the format fields of formatters in either JSON or YAML.

Then at runtime, you simply add the same attribute name into the logging record by adding a filter to a handler.
The set_context_injector below is a shortcut to add a filter to every handler of the root logger.

my_mac = 'AA:BB:CC:DD:EE:FF'

def mac_filter(record):
    # Add a MAC property to the record
    record.MAC = my_mac 
    
    # return False will discard this record
    return True

log_config = setup_logging()
log_config.set_context_injector(mac_filter)

Not tested yet, but hope it works well for you.
Have a good day!