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## Prometheus Monitoring Mixin for Ceph
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A set of Grafana dashboards and Prometheus alerts for Ceph.
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All the Grafana dashboards are already generated in the `dashboards_out`
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directory and alerts in the `prometheus_alerts.yml` file.
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You can use the Grafana dashboards and alerts with Jsonnet like any other
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prometheus mixin. You can find more resources about mixins in general on
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[monitoring.mixins.dev](https://monitoring.mixins.dev/).
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### Grafana dashboards for Ceph
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In `dashboards_out` you can find a collection of
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[Grafana](https://grafana.com/grafana) dashboards for Ceph Monitoring.
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These dashboards are based on metrics collected
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from [prometheus](https://prometheus.io/) scraping the [prometheus mgr
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plugin](http://docs.ceph.com/en/latest/mgr/prometheus/) and the
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[node_exporter](https://github.com/prometheus/node_exporter).
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#### Requirements
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- [Status Panel](https://grafana.com/plugins/vonage-status-panel) installed on
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your Grafana instance
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- [Pie Chart Panel](https://grafana.com/grafana/plugins/grafana-piechart-panel/)
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installed on your Grafana instance
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### Prometheus alerts
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In `prometheus_alerts.libsonnet` you'll find a set of Prometheus
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alert rules that should provide a decent set of default alerts for a
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Ceph cluster. After building them with jsonnet put this file in place according to your Prometheus
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configuration (wherever the `rules` configuration stanza points).
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### Multi-cluster support
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Ceph-mixin supports dashboards and alerts across multiple clusters.
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To enable this feature you need to configure the following in `config.libsonnnet`:
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```
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showMultiCluster: true,
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clusterLabel: '<your cluster label>',
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```
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#### SNMP
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Ceph provides a MIB (CEPH-PROMETHEUS-ALERT-MIB.txt) to support sending Prometheus
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alerts through to an SNMP management platform. The translation from Prometheus
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alert to SNMP trap requires the Prometheus alert to contain an OID that maps to
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a definition within the MIB. When making changes to the Prometheus alert rules
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file, developers should include any necessary changes to the MIB.
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### Building from Jsonnet
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- Install [jsonnet](https://jsonnet.org/) (at least v0.18.0)
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- By installing the package `jsonnet` in most of the distro and
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`golang-github-google-jsonnet` in fedora
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- Install [jsonnet-bundler](https://github.com/jsonnet-bundler/jsonnet-bundler)
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To rebuild all the generated files, you can run `tox -egrafonnet-fix`.
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The jsonnet code located in this directory depends on some Jsonnet third party
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libraries. To update those libraries you can run `jb update` and then update
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the generated files using `tox -egrafonnet-fix`.
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