如何在JSON中制作nginx错误日志，而不是默认的日志格式？

http {
    ...
    log_format json_format '{"time": "$time_iso8601", "remote_addr": "$remote_addr", "request_method": "$request_method", "request_uri": "$request_uri", "status": "$status", "body_bytes_sent": "$body_bytes_sent", "http_referer": "$http_referer", "http_user_agent": "$http_user_agent", "http_x_forwarded_for": "$http_x_forwarded_for", "request_time": "$request_time", "upstream_response_time": "$upstream_response_time", "upstream_addr": "$upstream_addr", "upstream_status": "$upstream_status"}';
    ...
}

server {
    ...
    access_log /path/to/error.log json_format;
    ...
}