Log fields

Back-end messages log the following keys. Some fields may be left out when there is no value available, others may write "<n/a>" instead.

Field Name
Description
req_id
ID of the request
sess_id
ID of the session the request belongs to
corr_id
Request correlation ID
corr_id_2
Second request correlation ID
corr_id_3
Third request correlation ID
mapping
Mapping name used to handle the request
vhost
The FQDN of the virtual host
vhost_ip
The IP address the virtual host is listening on
vhost_port
The port the virtual host is listening on
vhost_proto
The HTTP protocol used in the request
back_host
The back-end host the request was sent to
back_host_ip
The IP address of the back-end host the request was sent to
back_host_port
The port of the back-end host the request was sent to
back_host_proto
The protocol of the back-end host the request was sent to
error_code
The error code returned by libcurl
message
Message describing the log event