Cherry-pick #3863 to 5.3: Allow -
in Apache access log byte count
#3909
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Cherry-pick of PR #3863 to 5.3 branch. Original message:
Allows a
-
instead of a number for the byte sent part of the Apache access log, as described in http://httpd.apache.org/docs/current/mod/mod_log_config.htmlIn contrast, Nginx will always output
0
- so no need to change anything there.There are a few more pieces in the Grok pattern that are not quite in line with what Apache can produce. The Elasticsearch grok processor inherited a list of patterns from Logstash. One of them being
COMBINEDAPACHELOG
, we might want to mirror that in Filebeat. I guess that might be a more intrusive change, while this PR as-is can do no harm and should be fully backward compatible.