fix(machine-controller): power hosts on after decommissioning cycle - #5589
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ACPowercycle can leave the host off, so OOB rediscovery never starts.
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WalkthroughThe decommissioning workflow now includes a ChangesDecommissioning host power-on
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🔵 Low · up to The decommissioning flow now persists a new power-on state and may issue a host power-on command. The change is mergeable with owner awareness of rollback compatibility, configuration limits relative to the five-minute SLA, and preventing repeated power commands during concurrent or interrupted processing. Sequence Diagram(s)sequenceDiagram
participant Controller as machine-controller handler
participant PowerOn as handle_powering_on_host
participant Host as Redfish host
Controller->>PowerOn: Dispatch PoweringOnHost with power_down_wait
PowerOn->>Host: Check PowerState
alt Host is On
PowerOn->>Controller: Transition to OOB DHCP acknowledgement
else Host is PoweringOn
PowerOn->>Controller: Wait for power-on completion
else Host has another power state
PowerOn->>Host: Apply existing wait or power-on behavior
end
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✨ Finishing Touches🧪 Generate unit tests (beta)
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Inline comments:
In `@crates/machine-controller/src/handler/decommissioning.rs`:
- Line 753: Update handle_powering_on_host so PoweringOff returns
StateHandlerOutcome::wait without issuing SystemPowerControl::On; only invoke
host_power_control with On when the Redfish-reported power state is Off, while
preserving the existing behavior for On and PoweringOn.
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crates/api-model/src/machine/mod.rscrates/api-model/src/machine/slas.rscrates/machine-controller/src/handler.rscrates/machine-controller/src/handler/decommissioning.rscrates/machine-controller/src/io.rs
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| Ok(StateHandlerOutcome::transition( | ||
| ManagedHostState::Decommissioning { | ||
| decommissioning_state: DecommissioningState::WaitingForOobDhcpAcknowledgement, |
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When a BMC accepts the On request but does not actually begin the transition, this branch immediately leaves PoweringOnHost. WaitingForOobDhcpAcknowledgement only polls suppression records, so no later iteration checks the host or reissues the command, and decommissioning can still complete with the host powered off. Return a wait outcome after issuing On and transition only after a subsequent power-state read reports On or PoweringOn.
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Avoid overlapping On with an in-flight power-off during decommissioning.
Reissue On until Redfish reports On or PoweringOn so decommissioning does not advance after a no-op power request.
| .await?; | ||
| let power_state = super::host_power_state(redfish_client.as_ref()).await?; | ||
| match power_state { | ||
| PowerState::On | PowerState::PoweringOn => Ok(StateHandlerOutcome::transition( |
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should we not wait for On?
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Yeah, probably. Done
Leave PoweringOnHost only after Redfish reports a stable On state.
2 participants
While testing decommissioning on a GB200 managed host, I noticed it remained off after it went through the
PowerCyclingHoststate so it got stuck in the state machine until I manually powered it back on. Looks likeAcPowercyclemaps toForceOffif the BMC doesn't support power cycle.In this PR I add a new state to power on the machine if it remains off for a certain amount of time.
Related issues
#1969
Type of Change
Breaking Changes
Testing