This avoids the need to use a proxy, or some other means, to connect to
Prometheus. This is disabled by default and can be enabled by setting
enable_prometheus_server_external to true.

Change-Id: Ia0af044ff436c2a204b357750a16ff49fcdfec45

This change replaces ElasticSearch with OpenSearch, and Kibana
with OpenSearch Dashboards. It migrates the data from ElasticSearch
to OpenSearch upon upgrade.

No TLS support is in this patch (will be a followup).

A replacement for ElasticSearch Curator will be added as a followup.

Depends-On: https://review.opendev.org/c/openstack/kolla/+/830373



Co-authored-by: Doug Szumski <doug@stackhpc.com>
Co-authored-by: Kyle Dean <kyle@stackhpc.com>
Change-Id: Iab10ce7ea5d5f21a40b1f99b28e3290b7e9ce895

Change-Id: Ic55a7384c298ef517aa4b7f0eaa67d53b5d70df0

It has been seen to go green, so allow this.

Change-Id: Id86b95dbba3434b16f3d0c11485a0d8601833cbf

ELK 7 requires some minor changes from the existing ELK 6 config.

Depends-On: Icfa3db5788b25f70ee75411dbaf20d8d4a6a734b
Change-Id: I9815d202a77da0477aea43d714a5def8a24724fa

Tests prometheus, grafana, and centralised logging.

The tests could be improved in future by querying logs in elasticsearch,
and metrics in prometheus.

Change-Id: Iabad035d583d291169f23be3d71931cb260e87ae