Nginx access log

log_format    json '{'
  '"http":{'
    '"method":"$request_method",'
    '"request_id":"$request_id",'
    '"status_code":$status,'
    '"content_type":"$content_type",'
    '"url":"$request_uri",'
    '"url_details":{'
      '"path":"$uri",'
      '"scheme":"$scheme",'
      '"queryString":{'
        '"concurrency":$upstream_http_x_concurrency'
      '}'  
    '}'
  '},'
  '"network":{'
    '"bytes_written":$bytes_sent,'
    '"client":{'
      '"ip":"$remote_addr",'
      '"port":$remote_port'
    '},'
    '"destination":{'
      '"ip":"$server_addr",'
      '"port":$server_port'
    '},'
    '"docker":{'
      '"container_ip":"$upstream_addr",'
      '"container_id":"$upstream_http_x_container_id"'
    '},'
    '"tcpinfo":{'
      '"rtt":$tcpinfo_rtt,'
      '"rttvar":$tcpinfo_rttvar,'
      '"snd_cwnd":$tcpinfo_snd_cwnd,'
      '"rcv_space":$tcpinfo_rcv_space'
    '},'
    '"nginx":{'
      '"request_time":$request_time,'
      '"upstream_connect_time":$upstream_connect_time,'
      '"upstream_response_time":$upstream_response_time,'
      '"upstream_header_time":$upstream_header_time'
    '},'
    '"unicorn":{'
      '"queueing_delay":$upstream_http_x_queueing_delay,'
      '"service_time":$upstream_http_x_service_time'
    '}'
  '},'
  '"usr":{'
    '"account_id":$upstream_http_x_account_id,'
    '"id":$upstream_http_x_user_id'
  '}'
'}' escape=json;

MIT License

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a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
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permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.