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README.md: add monitoring section

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Aliaksandr Valialkin 2019-11-28 19:15:58 +02:00
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@ -110,6 +110,20 @@ An http load balancer must be put in front of `vminsert` and `vmselect` nodes:
Ports may be altered by setting `-httpListenAddr` on the corresponding nodes.
It is recommended setting up [monitoring](#monitoring) for the cluster.
### Monitoring
All the cluster components expose various metrics in Prometheus-compatible format at `/metrics` page on the TCP port set in `-httpListenAddr` command-line flag.
By default the following TCP ports are used:
- `vminsert` - 8480
- `vmselect` - 8481
- `vmstorage` - 8482
It is recommended setting up Prometheus to scrape `/metrics` pages from all the cluster components, so they can be monitored and analyzed
with [the official Grafana dashboard for VictoriaMetrics cluster](https://grafana.com/grafana/dashboards/11176).
### URL format