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Exceliance - ALOHA Load-Balancer Memo HAProxy HTTP log description Since HAProxy is located between users and servers, it is aware of anything that happened during the request. The present memo introduces the very verbose HAProxy HTTP logs. HAProxy Log line example Mar 9 15:08:05 LB1 local0.info haproxy[21843]: 10.0.0.1:1028 [09/Mar/2012:15:08:05.17
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  Exceliance - ALOHA Load-Balancer Memo HAProxy HTTP log descriptionSince  HAProxy  is located between users and servers, it is aware of anything that happened during the request.The present memo introduces the very verbose HAProxy HTTP logs. HAProxy Log line example Mar 9 15:08:05 LB1 local0.info haproxy[21843]: 10.0.0.1:1028 [09/Mar/2012:15:08:05.179] FT BK/SRV 0/0/1/8/9 304 12 - - --VN 4/4/0/1/0 0/0 ”GET / HTTP/1.1”1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Field name and definition # Example’s Value Name Customlog tagShort description1 Mar 9 15:08:05 Date at which the log has been emitted2 LB1 Aloha’s name3 local0.info Syslog facility4 haproxy[21843]: process name ’[’ pid ’]: HAProxy process’ name in the Aloha and its PID.5 10.0.0.1:1028 client ip ’:’ client port %Ci %Cp  client ip : IP address of the client which initiated the TCP connection to HAProxy client port : TCP port of the client which initiated the connection6 [09/Mar/2012:15:08:05.179] accept date %t exact date when the TCP connection was received by haproxy7 FT frontend name %f name of the frontend (or listener) which received and processed the connection8 BK/SRV backend name’/’server name %b/%s  backend name : name of the backend (or listener) which was selected to manage the connection to the server server name : name of the last server to which the connection was sent9 0/0/1/8/9 Tq ’/’ Tw ’/’ Tc ’/’ Tr ’/’ Tt* %Tq%Tw%Tc%Tr%Tt Tq : total time in milliseconds spent waiting for the client to send a full HTTP request, not counting data Tw : total time in milliseconds spent waiting in the various queues Tc : total time in milliseconds spent waiting for the connection to establish to the final server, including retries Tr : total time in milliseconds spent waiting for the server to send a full HTTP response, not counting data Tt : total time in milliseconds elapsed between the accept and the last close. It covers all possible processings10 304 status code %st HTTP status code returned to the client11 12 bytes read %B total number of bytes transmitted to the client when the log is emitted12 - - captured request cookiecaptured response cookie%cc%cs captured request cookie : optional ”name=value” entry indicating that the client had this cookie in the request captured response cookie : optional ”name=value” entry indicating that the server has returned a cookie with itsresponse13 --VN termination statecookie status%tsc  termination state : condition the session was in when the session ended cookie status : status of cookie persistence14 4/4/0/1/0 actconn ’/’feconn ’/’beconn ’/’srv conn ’/’retries%ac%fc%bc%sc%rc actconn : total number of concurrent connections on the process when the session was logged feconn : total number of concurrent connections on the frontend when the session was logged beconn : total number of concurrent connections handled by the backend when the session was logged srv conn : total number of concurrent connections still active on the server when the session was logged retries : number of connection retries experienced by this session when trying to connect to the server15 0/0 srv queue’/’backend queue %sq/%bq  srv queue : total number of requests which were processed before this one in the server queue backend queue : total number of requests which were processed before this one in the backend’s global queueN/A for the example above captured request headerscaptured response headers%hr%hs captured request headers : list of headers captured in the request due to the presence of the ”capture request header”statement in the frontend captured response headers : list of headers captured in the response due to the presence of the ”capture responseheader” statement in the frontend16 ”GET / HTTP/1.1” http request % { +Q } r the complete HTTP request line http://www.exceliance.eu/ Public document
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