> ## Documentation Index
> Fetch the complete documentation index at: https://docs.internal.nscale.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Delegated Device Health

> How Fleet Manager reports health for delegated devices across deployment scenarios.

Fleet Manager health reporting for `delegated` [devices](../start-here/glossary#node) is driven by Mimir telemetry,
not by deployment mode. The health-status agent does not receive Metal Managed or
Metal Self-Managed context; it queries Mimir for device health metrics and applies
the same missing-data behaviour for every device:

* Metric value `0`: `health_status=healthy`
* Metric value greater than `0`: `health_status=degraded`
* Missing, negative, or invalid metric: `health_status=unknown`

## Deployment Behaviour

| Deployment scenario | Delegated state | Mimir telemetry expectation | Health status behaviour |
| - | - | - | - |
| Fully Managed | Devices do not become `delegated`. | [BMC](../start-here/glossary#bmc) telemetry continues as normal. | Reported from Mimir as normal. |
| Metal Managed | Devices become `delegated` after handoff. | Read-only BMC telemetry is expected to continue flowing. | Reported from Mimir as normal. |
| Metal Self-Managed | Devices become `delegated` after handoff. | BMC telemetry is expected to stop until [reclaim](../start-here/glossary#reclaim). | `unknown` when absent from Mimir; if telemetry still arrives, Fleet Manager reports the metric. |

## Operator Notes

For a Metal Managed device, `delegated` means Fleet Manager lifecycle agents stand
down, but health can still update while read-only BMC telemetry is present in Mimir.

For a Metal Self-Managed device, `health_status=unknown` is expected while the device
is delegated. Fleet Manager has no BMC visibility until the device is reclaimed, so
absence from the Mimir query is not by itself a health-agent fault. If the device still
appears in the Mimir query, Fleet Manager will report that metric because the health
agent has no deployment-mode override.

If a delegated Metal Managed device unexpectedly reports `unknown`, first check
whether the device appears in the configured Mimir query and whether the health metric
contains the configured device label.


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