http { : log_format json escape=json '{"time": "$time_iso8601",' '"host": "$remote_addr",' '"vhost": "$host",' '"user": "$remote_user",' '"status": "$status",' '"protocol": "$server_protocol",' '"method": "$request_method",' '"path": "$request_uri",' '"req": "$request",' '"size": "$body_bytes_sent",' '"reqtime": "$request_time",' '"apptime": "$upstream_response_time",' '"ua": "$http_user_agent",'