MINOR: log: add a new field "%lc" to implement a per-frontend log counter
Sometimes it would be convenient to have a log counter so that from a log
server we know whether some logs were lost or not. The frontend's log counter
serves exactly this purpose. It's incremented each time a traffic log is
produced. If a log is disabled using "http-request set-log-level silent",
the counter will not be incremented. However, admin logs are not accounted
for. Also, if logs are filtered out before being sent to the server because
of a minimum level set on the log line, the counter will be increased anyway.
The counter is 32-bit, so it will wrap, but that's not an issue considering
that 4 billion logs are rarely in the same file, let alone close to each
other.
diff --git a/include/types/log.h b/include/types/log.h
index c7e47ea..c680663 100644
--- a/include/types/log.h
+++ b/include/types/log.h
@@ -53,6 +53,7 @@
LOG_FMT_SERVERPORT,
LOG_FMT_SERVERIP,
LOG_FMT_COUNTER,
+ LOG_FMT_LOGCNT,
LOG_FMT_PID,
LOG_FMT_DATE,
LOG_FMT_DATEGMT,