Our logstash servers are the last servers to upgrade to elasticsearch
5.5.2. I'm planning to do this upgrade on Thursday December 7, between
9:00 and 10:00 UTC (10:00 to 11:00 CET, 01:00 to 02:00 PST).
Testing on labs went well, so I'm not expecting any issue. Now that
all servers are behind LVS, we should not even loose a single message.
That being said, there is a risk. If you see disapearing log messages
during that period, please let me know!
Operations Engineer, Discovery
UTC+2 / CEST