uWSGI separate JSON logging for application compatible with Elasticsearch

uwsgi.conf

[uwsgi]

;this will encode uwsgi messages into JSON, encode requests to JSON and leave application output unchanged 
;if this output from application has msgName string

logger = default stdio
logger = secondlogger stdio
log-route = secondlogger msgName
log-route = default ^((?!msgName).)*$
log-encoder = json:default {"@timestamp":"${strftime:%%Y-%%m-%%dT%%H:%%M:%%S.666Z}","source":"uwsgi", "message":"${msg}"}
log-encoder = format:secondlogger ${msg}
log-encoder = nl
logger-req = stdio
log-req-encoder = json {"@timestamp":"${strftime:%%Y-%%m-%%dT%%H:%%M:%%S.666Z}","source":"req", "message":"${msg}"}
log-req-encoder = nl