Add prometheus relay service
Set 2 replicas for prometheus server
Change-Id: I859195d5504d61511830899f2c28c92e24219585
diff --git a/.releasenotes/notes/spawn-multiple-replicas-prometheus-b80eaede9c19b8cd.yaml b/.releasenotes/notes/spawn-multiple-replicas-prometheus-b80eaede9c19b8cd.yaml
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+summary: >
+ Spawned two replicas of Prometheus to provide HA
+
+features:
+ - Spawned two replicas of Prometheus inside Docker Swarm.
+ These two instances have the same configuration file
+ and scrape the same endpoints. Therefore, they can be
+ treated as one-to-one copies.
+ Due to a limitation, when connecting to the Prometheus
+ web UI it is not possible to choose to which of the
+ existing Prometheus servers to connect and those
+ servers may contain slightly different results for the
+ same queries. Therefore, we suggest that you use Grafana
+ to visualize the data.