Initial Grafana dashboard

Author: sandhose

misc/grafana/.gitignore

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+vendor/

misc/grafana/README.md

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+# Grafana dashboard
+
+This directory contains a Grafana dashboard for monitoring matrix-authentication-service.
+
+It is defined using [jsonnet] and the [grafonnet] library.
+
+## Usage
+
+The built dashboard is available at `dashboard.json`.
+Import it into Grafana to start using it.
+
+## Development and customization
+
+Requirements:
+
+- [go-jsonnet]
+- [jsonnet-bundler]
+
+First install the dependencies using [jsonnet-bundler]:
+
+```sh
+jb install
+```
+
+Regenerate the dashboard using [go-jsonnet]:
+
+```sh
+jsonnet -J vendor -o dashboard.json dashboard.libsonnet
+```
+
+[jsonnet]: https://jsonnet.org/
+[go-jsonnet]: https://github.com/google/go-jsonnet
+[grafonnet]: https://github.com/grafana/grafonnet
+[jsonnet-bundler]: https://github.com/jsonnet-bundler/jsonnet-bundler