cc-metric-collector/collectors/diskstatMetric.md

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## `diskstat` collector
```json
"diskstat": {
"exclude_metrics": [
"disk_total"
],
}
```
The `diskstat` collector reads data from `/proc/self/mounts` and outputs a handful **node** metrics. If a metric is not required, it can be excluded from forwarding it to the sink.
Metrics per device (with `device` tag):
* `disk_total` (unit `GBytes`)
* `disk_free` (unit `GBytes`)
Global metrics:
* `part_max_used` (unit `percent`)