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mscluster: use AllocatedSize for virtual disk storage efficiency (#2432)

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Co-authored-by: EisenbergD <dominik.eisenberg@beiersdorf.com>
Signed-off-by: EisenbergD <dominik.eisenberg@beiersdorf.com>
This commit is contained in:
Dominik Eisenberg
2026-06-26 14:55:09 +02:00
committed by GitHub
parent e3089f0164
commit 70a1777422
2 changed files with 27 additions and 5 deletions
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3
docs/collector.mscluster.md
View File

@@ -185,8 +185,9 @@ Matching is case-sensitive.
| `mscluster_virtualdisk_info` | Virtual disk information (value is always 1) | gauge | `name`, `unique_id` |
| `mscluster_virtualdisk_health_status` | Health status of the virtual disk. 0: Healthy, 1: Warning, 2: Unhealthy, 5: Unknown | gauge | `name`, `unique_id` |
| `mscluster_virtualdisk_size_bytes` | Total size of the virtual disk in bytes | gauge | `name`, `unique_id` |
| `mscluster_virtualdisk_allocated_size_bytes` | Allocated size of the virtual disk in bytes (capacity actually provisioned, excludes thin-provisioned unused capacity) | gauge | `name`, `unique_id` |
| `mscluster_virtualdisk_footprint_on_pool_bytes` | Physical storage consumed by the virtual disk on the storage pool in bytes | gauge | `name`, `unique_id` |
| `mscluster_virtualdisk_storage_efficiency_percent` | Storage efficiency percentage (Size / FootprintOnPool * 100) | gauge | `name`, `unique_id` |
| `mscluster_virtualdisk_storage_efficiency_percent` | Storage efficiency percentage (AllocatedSize / FootprintOnPool * 100) | gauge | `name`, `unique_id` |
### Example metric
Query the state of all cluster resource owned by node1

29
internal/collector/mscluster/mscluster_virtualdisk.go
View File

@@ -34,6 +34,7 @@ type collectorVirtualDisk struct {
virtualDiskInfo *prometheus.Desc
virtualDiskHealthStatus *prometheus.Desc
virtualDiskSize *prometheus.Desc
virtualDiskAllocatedSize *prometheus.Desc
virtualDiskFootprintOnPool *prometheus.Desc
virtualDiskStorageEfficiency *prometheus.Desc
}
@@ -44,12 +45,13 @@ type msftVirtualDisk struct {
UniqueId string `mi:"UniqueId"`
HealthStatus uint16 `mi:"HealthStatus"`
Size uint64 `mi:"Size"`
AllocatedSize uint64 `mi:"AllocatedSize"`
FootprintOnPool uint64 `mi:"FootprintOnPool"`
// OperationalStatus []uint16 `mi:"OperationalStatus"` Not supported my mi query: https://github.com/prometheus-community/windows_exporter/pull/2296#issuecomment-3736584632
}
func (c *Collector) buildVirtualDisk() error {
wmiSelect := "FriendlyName,UniqueId,HealthStatus,Size,FootprintOnPool"
wmiSelect := "FriendlyName,UniqueId,HealthStatus,Size,AllocatedSize,FootprintOnPool"
virtualDiskMIQuery, err := mi.NewQuery(fmt.Sprintf("SELECT %s FROM MSFT_VirtualDisk", wmiSelect))
if err != nil {
@@ -79,6 +81,13 @@ func (c *Collector) buildVirtualDisk() error {
nil,
)
c.virtualDiskAllocatedSize = prometheus.NewDesc(
prometheus.BuildFQName(types.Namespace, nameVirtualDisk, "allocated_size_bytes"),
"Allocated size of the virtual disk in bytes (data actually provisioned, excludes thin-provisioned unused capacity)",
[]string{"name", "unique_id"},
nil,
)
c.virtualDiskFootprintOnPool = prometheus.NewDesc(
prometheus.BuildFQName(types.Namespace, nameVirtualDisk, "footprint_on_pool_bytes"),
"Physical storage consumed by the virtual disk on the storage pool in bytes",
@@ -88,7 +97,7 @@ func (c *Collector) buildVirtualDisk() error {
c.virtualDiskStorageEfficiency = prometheus.NewDesc(
prometheus.BuildFQName(types.Namespace, nameVirtualDisk, "storage_efficiency_percent"),
"Storage efficiency percentage (Size / FootprintOnPool * 100)",
"Storage efficiency percentage (AllocatedSize / FootprintOnPool * 100)",
[]string{"name", "unique_id"},
nil,
)
@@ -134,6 +143,14 @@ func (c *Collector) collectVirtualDisk(ch chan<- prometheus.Metric, maxScrapeDur
vdisk.UniqueId,
)
ch <- prometheus.MustNewConstMetric(
c.virtualDiskAllocatedSize,
prometheus.GaugeValue,
float64(vdisk.AllocatedSize),
vdisk.FriendlyName,
vdisk.UniqueId,
)
ch <- prometheus.MustNewConstMetric(
c.virtualDiskFootprintOnPool,
prometheus.GaugeValue,
@@ -142,10 +159,14 @@ func (c *Collector) collectVirtualDisk(ch chan<- prometheus.Metric, maxScrapeDur
vdisk.UniqueId,
)
// Calculate storage efficiency (avoid division by zero)
// Calculate storage efficiency (avoid division by zero).
// AllocatedSize (not Size) is the correct numerator: Size is the
// thin-provisioned ceiling, while AllocatedSize reflects the capacity
// actually provisioned. Using Size inflates the ratio on thin-provisioned
// disks (e.g. S2D FTT2 CSVs).
var storageEfficiency float64
if vdisk.FootprintOnPool > 0 {
storageEfficiency = float64(vdisk.Size) / float64(vdisk.FootprintOnPool) * 100
storageEfficiency = float64(vdisk.AllocatedSize) / float64(vdisk.FootprintOnPool) * 100
} else {
storageEfficiency = 0
}