Monasca is an open-source monitoring-as-a-service solution under the OpenStack “Big Tent”. It aims to be highly performant, scalable, and fault-tolerant.
Monasca discussion usually occurs on IRC at OFTC #openstack-monasca
Many major companies are also involved in developing or deploying Monasca:
Several overviews of Monasca can be found at the following:
Monasca is licensed under the Apache 2.0 license.