expose node level disk & fs metrics (if not already present in node exporter)

[iyashu]

Required node disk & filesystem level metrics along with their grafana dashboards and few sane alerts preferably in kube-prometheus mixin format. I think most of the following metrics are already present in node exporter and we just need to add the grafana dashboard and few basic alerts. Feel free to add more if required.

1. Utilisation metrics (both inodes and bytes usage) along with total space available.
2. Disk read and write throughput metrics both in terms of iops and bytes per second.
3. Disk read & write IO latency.
4. No. of outstanding IO operations (preferably both queued as well as waiting for block device).

Environment:

• Kubernetes version (use kubectl version): >= 1.19
• OS (e.g. from /etc/os-release): Debian 10

[dsharma-dc]

Need to scope in the roadmap. Need to verify the available metrics using dashboard. @abhilashshetty04 Could you please check this.

[dsharma-dc]

This isn't prioritised for product inclusion or scoping yet.

[avishnu]

@abhilashshetty04 please check if the node-exporter has these metrics included.