Fluentd has been deprecated in OSP15 and removed in OSP16, so we don't need following packages any more: puppet-fluentd fluentd rubygem-cool.io rubygem-http_parser.rb rubygem-json rubygem-msgpack rubygem-sigdump rubygem-string-scrub rubygem-thread_safe rubygem-tzinfo rubygem-yajl-ruby
Lon, fluentd configuration has been removed from TripleO, so you are free to remove packages and container.
upstream removal of puppet-sensu, puppet-fluentd, and puppet-uchiwa https://review.rdoproject.org/r/#/c/24866/ (merged)
only build not dropped from OSP 16.0 was puppet-fluentd