The plugin supports the following configuration parameters:
Check if a key with a given name exists in the record.
Check if a key does not exist in the record.
check that the value of the key is NULL.
check that the value of the key is NOT NULL.
check that the value of the key equals the given value in the configuration.
action to take when a rule does not match. The available options are warn or exit. On warn, a warning message is sent to the logging layer when a mismatch of the rules above is found; using exit makes Fluent Bit abort with status code 255
As mentioned on top, refer to the following page for specific details of usage of this filter: