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net: match PDH adapter names, format full MAC addresses, reuse buffers (#2689)

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Co-authored-by: Claude <noreply@anthropic.com>
Signed-off-by: Claude <noreply@anthropic.com>
This commit is contained in:
Jan-Otto Kröpke
2026-10-11 20:44:44 +02:00
committed by GitHub
co-authored by Claude
parent 08bcab7f9a
commit 9869fb12d1
4 changed files with 180 additions and 61 deletions
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docs/collector.net.md
+8 -3
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@@ -5,8 +5,7 @@ The net collector exposes metrics about network interfaces
|||
-|-
Metric name prefix | `net`
Data source | Perflib
Classes | [`Win32_PerfRawData_Tcpip_NetworkInterface`](https://technet.microsoft.com/en-us/security/aa394340(v=vs.80))
Data source | Performance counters (`Network Interface`), [`GetAdaptersAddresses`](https://learn.microsoft.com/en-us/windows/win32/api/iphlpapi/nf-iphlpapi-getadaptersaddresses)
Enabled by default? | Yes
## Flags
@@ -27,6 +26,12 @@ Comma-separated list of collectors to use. Defaults to all, if not specified. Su
Default: `metrics,nic_info`
## Interface names
The `nic` label is the instance name of the adapter in the `Network Interface` performance counter object. It is the adapter description with `(` and `)` replaced by `[` and `]`, and `#`, `/` and `\` replaced by `_`, for example `Intel[R] PRO_1000 MT Network Connection _2`. The include and exclude expressions match this name.
The `mac` label of `windows_net_nic_info` is empty for adapters without a physical address, like the loopback adapter.
## Metrics
| Name | Description | Type | Labels |
@@ -59,7 +64,7 @@ rate(windows_net_bytes_sent_total{instance="localhost"}[2m])
## Useful queries
Get total utilisation of network interface as a percentage
```
rate(windows_net_bytes_total{instance="localhost", nic="Microsoft_Hyper_V_Network_Adapter__1"}[2m]) / windows_net_current_bandwidth_bytes{instance="localhost", nic="Microsoft_Hyper_V_Network_Adapter__1"} * 100
rate(windows_net_bytes_total{instance="localhost", nic="Microsoft Hyper-V Network Adapter _2"}[2m]) / windows_net_current_bandwidth_bytes{instance="localhost", nic="Microsoft Hyper-V Network Adapter _2"} * 100
```
## Alerting examples