Logging

Adding the HTTP basic auth username to Envoy access logs with a Lua filter that base64 decodes the Authorization header.

Pulling request logs out of Cloudflare with the log API: zone ID, scoped API key, the field list and a worked curl query.

Cloudera Manager's log4j will not compress rotated logs. The Apache Extras rolling appender does, pasted into the logging safety valve.

Python that gzips log data in memory with StringIO and writes it straight into HDFS through pyhdfs, ready for Hive or MapReduce.

Build order and configure flags for compiling Facebook Scribe with HDFS support: boost, thrift, fb303, then scribe itself.

A Perl Nagios check for the Flume DFO backlog directory, so a failed driver does not quietly fill the local disk.