sapcc-baremetal

SAP CC Bare Metal (Ironic)

Inspect baremetal nodes: list nodes, check provision/power states, understand maintenance status and driver configuration.

MCP Tools

Read Tools

Tool	Purpose	Key Parameters
ironic_list_nodes	List baremetal nodes	provision_state, maintenance (true/false), driver, resource_class, instance_uuid, fault, owner
ironic_get_node	Full node detail (sensitive fields excluded)	node_id (required, UUID or name)
ironic_list_node_ports	List NICs for a node	node_id (required)
ironic_list_allocations	List node allocations	node_id, resource_class
ironic_list_portgroups	List port groups (bonded NICs)	node_id

Admin Tools (requires MCP_ADMIN_TOOLS=true)

Tool	Purpose	Key Parameters
ironic_list_chassis†	List baremetal chassis	(none)
ironic_node_power_state†*	Change node power state	node_id (required), target (required: power on/power off/rebooting), confirmed

Security: Credential Isolation

• DriverInfo excluded: Node detail NEVER exposes BMC credentials (IPMI passwords, Redfish creds, iDRAC secrets)
• DriverInternalInfo excluded: Internal provisioning state with potential secrets omitted
• InstanceInfo excluded: Nova instance provisioning details omitted
• Properties excluded: Hardware properties that may contain sensitive deployment info

Guardrails

• Path segment validation: node_id accepts both UUID and human-readable names safely
• Power state allowlist: Only power on, power off, rebooting accepted as targets
• Confirmation required: Power state changes return preview unless confirmed=true
• Destructive action gate: The destructive-action-gate hook blocks ironic_node_power_state until user approves

Gotchas

1. Sensitive fields are redacted. The MCP tool intentionally omits driver_info, driver_internal_info, instance_info, and properties from ironic_get_node responses. These may contain BMC credentials (IPMI passwords, Redfish secrets). Do not tell users these fields are accessible.

2. maintenance filter is a string "true", not a boolean. Pass maintenance="true" as a string value. There is no "false" filter — omit the parameter to see all nodes regardless of maintenance status.

3. provision_state vs power_state. provision_state is the lifecycle state (available, deploying, active, error). power_state is the physical state (power on, power off). A node can be active provision but power off if manually shut down.

4. "available" means ready for deployment. In Ironic, available does not mean "has capacity" — it means the node is enrolled, inspected, cleaned, and ready to receive a workload. active means already deployed.

5. instance_uuid links to Nova. When a node is in active state, instance_uuid shows which Nova server is running on it. Use this to cross-reference with nova_get_server.

6. node_id accepts UUID or name. Unlike most OpenStack tools that require UUIDs, ironic_get_node accepts either the node UUID or its human-readable name.

7. last_error contains deployment failure details. When provision_state=error, the last_error field in the get response describes what went wrong (e.g., timeout during deploy, cleaning failure, network boot failure).

Common Workflows

List Nodes Available for Deployment

1. ironic_list_nodes with provision_state=available — show nodes ready for workloads.
2. Filter by resource_class if you need a specific hardware profile.
3. Verify maintenance=false in results — maintenance nodes cannot be deployed to.

Diagnose a Node in Error State

1. ironic_list_nodes with provision_state=error — find all error nodes.
2. ironic_get_node with node_id=<uuid> — check last_error for the failure reason.
3. Check maintenance and maintenance_reason — the node may have been put in maintenance due to the error.
4. Check fault field for categorized fault information.

Find the Physical Node Running a VM

1. Start with the Nova server UUID.
2. ironic_list_nodes — scan results for instance_uuid matching your server UUID.
3. Or if you know the node: ironic_get_node and check instance_uuid.

Cross-Service References

Need	Service	Tool
VM running on this node	Nova	nova_get_server(<instance_uuid>)
Who modified node state	Hermes	hermes_list_events(target_type=node)
Compute quota (includes baremetal flavors)	Limes	limes_get_project_quota(service=compute)
Network ports attached to node	Neutron	neutron_list_ports