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@@ -19,7 +19,7 @@ Longer term, regional replicas of the DN42 site may be provided however this is
 
 ## Looking Glass
 
-[lg.burble.com](https://lg.burble.com) (public internet link)
+[lg.burble.com](https://lg.burble.com) (public internet link)  
 [lg.burble.dn42](https://lg.burble.dn42) (dn42 link)
 
 The burble.dn42 looking glass is based on [bird-lg](https://github.com/sileht/bird-lg) with patches by
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@@ -0,0 +1,75 @@
+Details of the burble.dn42 hosted Grafana service.
+
+===
+
+# Hosted Grafana Service
+
+|Host / URL|Service|
+|:--|:--|
+|[http://grafana.burble.dn42](http://grafana.burble.dn42)|Grafana Dashboards (dn42 link)|
+|[https://grafana.burble.com](https://grafana.burble.com)|Grafana Dashboards (public internet link)|
+|influx.burble.dn42:8086|InfluxDB Endpoint|
+
+The hosted grafana service provides an [InfluxDB](https://www.influxdata.com/) and
+[Grafana](https://grafana.com/) combination for storing and displaying stats and metrics.
+The service can accept metrics from any source that is able to
+[publish](https://docs.influxdata.com/influxdb/v1.7/supported_protocols/) to the InfluxDB, including
+[Prometheus](https://prometheus.io/) and
+[Telegraf](https://www.influxdata.com/time-series-platform/telegraf/).
+
+To apply for an account, contact dn42@burble.com.
+
+Accounts are provided with a dedicated database and Grafana organisation
+allowing users to create and manage their own graphs and dashboards as required. The Influx
+database will store up to 1 year of data with a minimum interval of 1 minute. 
+
+The grafana service is hosted on dn42-fr-rbx1.burble.dn42. Service users are encouraged to peer
+directly with the service node in order to lower latencies and avoid sending large amounts of
+data through other nodes in DN42. 
+
+# DN42 Infrastructure Monitoring
+
+The burble.dn42 network provides monitoring and alerting of key DN42 infrastructure.
+The monitoring service logs metrics to the hosted grafana service, and presents alerts to
+the #dn42-bots channel and slack. Two monitoring nodes hosted in separate regions ensure that
+alerts will be generated if the main monitoring node fails. 
+
+The monitoring architecture is detailed below:
+
+![Monitoring Diagram](DN42%20Monitoring%20190524.png)
+
+#### Nodes
+
+The main monitoring node is hosted on dn42-de-fra1, with a secondary backup node on dn42-us-nyc1.
+Both nodes monitor the availability of services on each other and are capable of alerting if the
+peer node is unavailable.
+
+#### Presentation
+
+Metrics collected by the service are presented as public graphs in the burble.dn42 grafana service
+(see above).
+
+#### Alerting
+
+AlertManager is configured as a cluster, operating across both monitoring nodes. Alerts are
+published in real time to the #dn42-bots hackint IRC channel (using
+[alertmanager-irc-relay](https://github.com/google/alertmanager-irc-relay) and
+burble.dn42/dn42-alerts channel in slack.
+
+Alerts typically fire when a problem occurs for 5 minutes or longer.
+
+#### Collection and Storage
+
+Prometheus is used to collect metrics from the various probes and publish them to the hosted Influx
+database. Typically metrics are collected every minute, although this is reduced to every five minutes
+for the clearnet DN42 services to avoid excessive load.
+
+The main node for data collection is monitor.de-fra1.burble.dn42
+
+#### Probes
+
+|||
+|:--|:--|
+|[blackbox_exporter](https://github.com/prometheus/blackbox_exporter)|Used to ping hosts or query services (e.g. HTTP/s probes)|
+|[netdata](https://github.com/netdata/netdata)|Used to collect many host system metrics|
+|[dn42promsrv](https://git.burble.com/burble.dn42/dn42promsrv)|Custom scripts for DN42 specific probdes|
diff --git a/user/pages/01.home/maintenance-log/default.md b/user/pages/01.home/maintenance-log/default.md
index 43239c5..9c4d8c7 100755
--- a/user/pages/01.home/maintenance-log/default.md
+++ b/user/pages/01.home/maintenance-log/default.md
@@ -10,6 +10,12 @@ A log of changes to the burble.dn42 network.
 
 ## burble.dn42 Maintenance Log
 
+#### 24th May 2019
+
+Moved and extended the DN42 monitoring so that it is more independent and also clustered.
+
+A writeup of the hosted grafana service and monitoring is available [here](/home/grafana-services).
+
 #### 21st May 2019
 
 dn42-uk-lon1 is back again after being out of action for the day.