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Add documentation for logical_disk collector

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Ben Reedy
2019-08-21 23:04:20 +10:00
parent 84970ac086
commit 091406877a
1 changed files with 75 additions and 44 deletions
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docs/collector.logical_disk.md
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@@ -22,23 +22,54 @@ If given, a disk needs to *not* match the blacklist regexp in order for the corr
Name | Description | Type | Labels Name | Description | Type | Labels
-----|-------------|------|------- -----|-------------|------|-------
`requests_queued` | _Not yet documented_ | gauge | `volume` `requests_queued` | Number of requests outstanding on the disk at the time the performance data is collected | gauge | `volume`
`read_bytes_total` | _Not yet documented_ | counter | `volume` `read_bytes_total` | Rate at which bytes are transferred from the disk during read operations | counter | `volume`
`reads_total` | _Not yet documented_ | counter | `volume` `reads_total` | Rate of read operations on the disk | counter | `volume`
`write_bytes_total` | _Not yet documented_ | counter | `volume` `write_bytes_total` | Rate at which bytes are transferred to the disk during write operations | counter | `volume`
`writes_total` | _Not yet documented_ | counter | `volume` `writes_total` | Rate of write operations on the disk | counter | `volume`
`read_seconds_total` | _Not yet documented_ | counter | `volume` `read_seconds_total` | Seconds the disk was busy servicing read requests | counter | `volume`
`write_seconds_total` | _Not yet documented_ | counter | `volume` `write_seconds_total` | Seconds the disk was busy servicing write requests | counter | `volume`
`free_bytes` | _Not yet documented_ | gauge | `volume` `free_bytes` | Unused space of the disk in bytes | gauge | `volume`
`size_bytes` | _Not yet documented_ | gauge | `volume` `size_bytes` | Total size of the disk in bytes | gauge | `volume`
`idle_seconds_total` | _Not yet documented_ | counter | `volume` `idle_seconds_total` | Seconds the disk was idle (not servicing read/write requests) | counter | `volume`
`split_ios_total` | _Not yet documented_ | counter | `volume` `split_ios_total` | Number of I/Os to the disk split into multiple I/Os | counter | `volume`
### Example metric ### Example metric
_This collector does not yet have explained examples, we would appreciate your help adding them!_ Query the rate of write operations to a disk
```
rate(wmi_logical_disk_read_bytes_total{instance="localhost", volume=~"C:"}[2m])
```
## Useful queries ## Useful queries
_This collector does not yet have any useful queries added, we would appreciate your help adding them!_ Calculate rate of total IOPS for disk
```
rate(wmi_logical_disk_reads_total{instance="localhost", volume="C:"}[2m]) + rate(wmi_logical_disk_writes_total{instance="localhost", volume="C:"}[2m])
```
## Alerting examples ## Alerting examples
_This collector does not yet have alerting examples, we would appreciate your help adding them!_ **prometheus.rules**
```
groups:
- name: Windows Disk Alerts
rules:
# Sends an alert when disk space usage is above 95%
- alert: DiskSpaceUsage
expr: 100.0 - 100 * (wmi_logical_disk_free_bytes / wmi_logical_disk_size_bytes) > 95
for: 10m
labels:
severity: high
annotations:
summary: "Disk Space Usage (instance {{ $labels.instance }})"
description: "Disk Space on Drive is used more than 95%\n VALUE = {{ $value }}\n LABELS: {{ $labels }}"
# Alerts on disks with over 85% space usage predicted to fill within the next four days
- alert: DiskFilling
expr: 100 * (wmi_logical_disk_free_bytes / wmi_logical_disk_size_bytes) < 15 and predict_linear(wmi_logical_disk_free_bytes[6h], 4 * 24 * 3600) < 0
for: 10m
labels:
severity: warning
annotations:
summary: "Disk full in four days (instance {{ $labels.instance }})"
description: "{{ $labels.volume }} is expected to fill up within four days. Currently {{ $value | humanize }}% is available.\n VALUE = {{ $value }}\n LABELS: {{ $labels }}"
```