Hi, the elk role requires this as elasticsearch installs a python plugin
==> default: Error: Execution of '/usr/bin/pip install -q elasticsearch-curator' returned 1: Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-YwJ6az/elasticsearch-curator/ ==> default: Error: /Stage[main]/Logstash::Output::Elasticsearch/Package[elasticsearch-curator]/ensure: change from absent to present failed: Execution of '/usr/bin/pip install -q elasticsearch-curator' returned 1: Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-YwJ6az/elasticsearch-curator/
This seems to be needed for the stretch migration as it works for jessie.