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Add monitoring to Cloud4

M.G. Roeleveld requested to merge add-monitoring into main

This sets up the monitor-0 box and enables monitoring data to flow.

  • Setup Prometheus, Loki and Grafana on monitor-0
  • Setup Prometheus Node Exporter on all hosts
  • Enable Ceph Prometheus Plugin on the Ceph monitor
  • Setup Promtail on all hosts to export logs to Loki
  • Add datasources and some default dashboards to Grafana

Monitoring gets brought up rather early in the Terraform process when you bring up a new cloud; this allows you to start grabbing data (and sifting through logs) as early as possible.

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