lstv format for nginx
access_log /var/log/access.log ltsv;
error_log /var/log/error.log;
log_format ltsv 'time:$time_iso8601\t'
'remote_addr:$remote_addr\t'
'request_method:$request_method\t'
'request_length:$request_length\t'
'request_uri:$request_uri\t'
'https:$https\t'
'uri:$uri\t'
'query_string:$query_string\t'
'status:$status\t'
'bytes_sent:$bytes_sent\t'
'body_bytes_sent:$body_bytes_sent\t'
'referer:$http_referer\t'
'useragent:$http_user_agent\t'
'forwardedfor:$http_x_forwarded_for\t'
'request_time:$request_time\t'
'upstream_response_time:$upstream_response_time';
access_log /var/log/access.log ltsv;
error_log /var/log/error.log ltsv;