oxidecomputer · jgallagher · Aug 31, 2026
diff --git a/nexus/db-queries/src/db/datastore/physical_disk.rs b/nexus/db-queries/src/db/datastore/physical_disk.rs
@@ -774,9 +774,10 @@ mod test {
     use sled_agent_types::disk::DiskIdentity;
     use sled_agent_types::disk::DiskVariant;
     use sled_agent_types::inventory::{
-        ConfigReconcilerInventoryStatus, FmdInventory, Inventory,
-        InventoryDisk, OmicronFileSourceResolverInventory, SledCpuFamily,
-        SledRole, SvcsEnabledNotOnlineResult,
+        ConfigReconcilerInventoryStatus, CurrentUpdateDisposition,
+        FmdInventory, InstanceManagerStatus, Inventory, InventoryDisk,
+        OmicronFileSourceResolverInventory, OmicronSledUpdateDisposition,
+        SledCpuFamily, SledRole, SvcsEnabledNotOnlineResult,
     };
     use sled_hardware_types::BaseboardId;
     use std::num::NonZeroU32;
@@ -1133,6 +1134,12 @@ mod test {
                     reconciler_status:
                         ConfigReconcilerInventoryStatus::NotYetRun,
                     last_reconciliation: None,
+                    instance_manager_status: InstanceManagerStatus {
+                        update_disposition: CurrentUpdateDisposition::Known(
+                            OmicronSledUpdateDisposition::Available,
+                        ),
+                        num_registered_vmms: 0,
+                    },
                     file_source_resolver:
                         OmicronFileSourceResolverInventory::new_fake(),
                     smf_services_enabled_not_online:

diff --git a/nexus/inventory/src/examples.rs b/nexus/inventory/src/examples.rs
@@ -52,8 +52,10 @@ use sled_agent_types::inventory::BootPartitionDetails;
 use sled_agent_types::inventory::ConfigReconcilerInventory;
 use sled_agent_types::inventory::ConfigReconcilerInventoryResult;
 use sled_agent_types::inventory::ConfigReconcilerInventoryStatus;
+use sled_agent_types::inventory::CurrentUpdateDisposition;
 use sled_agent_types::inventory::FmdInventory;
 use sled_agent_types::inventory::HostPhase2DesiredSlots;
+use sled_agent_types::inventory::InstanceManagerStatus;
 use sled_agent_types::inventory::Inventory;
 use sled_agent_types::inventory::InventoryDataset;
 use sled_agent_types::inventory::InventoryDisk;
@@ -1131,6 +1133,13 @@ pub fn sled_agent(
     });
     let fmd = Ok(FmdInventory { cases: fmd_cases, resources: fmd_resources });
 
+    let instance_manager_status = InstanceManagerStatus {
+        update_disposition: CurrentUpdateDisposition::Known(
+            OmicronSledUpdateDisposition::Available,
+        ),
+        num_registered_vmms: 3,
+    };
+
     Inventory {
         baseboard_id,
         reservoir_size: ByteCount::from(1024),
@@ -1146,6 +1155,7 @@ pub fn sled_agent(
         ledgered_sled_config,
         reconciler_status,
         last_reconciliation,
+        instance_manager_status,
         file_source_resolver,
         smf_services_enabled_not_online,
         reference_measurements,

diff --git a/nexus/mgs-updates/src/test_util/host_phase_2_test_state.rs b/nexus/mgs-updates/src/test_util/host_phase_2_test_state.rs
@@ -242,9 +242,11 @@ mod api_impl {
     use sled_agent_types::inventory::BootPartitionDetails;
     use sled_agent_types::inventory::ConfigReconcilerInventory;
     use sled_agent_types::inventory::ConfigReconcilerInventoryStatus;
+    use sled_agent_types::inventory::CurrentUpdateDisposition;
     use sled_agent_types::inventory::FmdInventory;
     use sled_agent_types::inventory::HostPhase2DesiredContents;
     use sled_agent_types::inventory::HostPhase2DesiredSlots;
+    use sled_agent_types::inventory::InstanceManagerStatus;
     use sled_agent_types::inventory::Inventory;
     use sled_agent_types::inventory::ManifestInventory;
     use sled_agent_types::inventory::MupdateOverrideInventory;
@@ -385,6 +387,12 @@ mod api_impl {
                     remove_mupdate_override: None,
                     boot_partitions,
                 }),
+                instance_manager_status: InstanceManagerStatus {
+                    update_disposition: CurrentUpdateDisposition::Known(
+                        OmicronSledUpdateDisposition::Available,
+                    ),
+                    num_registered_vmms: 0,
+                },
                 fmd: Ok(FmdInventory::default()),
                 file_source_resolver: OmicronFileSourceResolverInventory {
                     zone_manifest: ManifestInventory {

diff --git a/nexus/reconfigurator/planning/src/mgs_updates/test_helpers.rs b/nexus/reconfigurator/planning/src/mgs_updates/test_helpers.rs
@@ -34,8 +34,10 @@ use sled_agent_types::inventory::BootPartitionContents;
 use sled_agent_types::inventory::BootPartitionDetails;
 use sled_agent_types::inventory::ConfigReconcilerInventory;
 use sled_agent_types::inventory::ConfigReconcilerInventoryStatus;
+use sled_agent_types::inventory::CurrentUpdateDisposition;
 use sled_agent_types::inventory::FmdInventory;
 use sled_agent_types::inventory::HostPhase2DesiredSlots;
+use sled_agent_types::inventory::InstanceManagerStatus;
 use sled_agent_types::inventory::Inventory;
 use sled_agent_types::inventory::OmicronFileSourceResolverInventory;
 use sled_agent_types::inventory::OmicronSledConfig;
@@ -1321,6 +1323,13 @@ impl<'a> TestBoardCollectionBuilder<'a> {
                             ledgered_sled_config: Some(fake_sled_config),
                             reconciler_status:
                                 ConfigReconcilerInventoryStatus::NotYetRun,
+                            instance_manager_status: InstanceManagerStatus {
+                                update_disposition:
+                                    CurrentUpdateDisposition::Known(
+                                        OmicronSledUpdateDisposition::Available,
+                                    ),
+                                num_registered_vmms: 0,
+                            },
                             file_source_resolver:
                                 OmicronFileSourceResolverInventory::new_fake(),
                             smf_services_enabled_not_online:

diff --git a/nexus/reconfigurator/planning/src/system.rs b/nexus/reconfigurator/planning/src/system.rs
@@ -62,7 +62,9 @@ use sled_agent_types::disk::DiskVariant;
 use sled_agent_types::disk::M2Slot;
 use sled_agent_types::inventory::ConfigReconcilerInventory;
 use sled_agent_types::inventory::ConfigReconcilerInventoryStatus;
+use sled_agent_types::inventory::CurrentUpdateDisposition;
 use sled_agent_types::inventory::FmdInventory;
+use sled_agent_types::inventory::InstanceManagerStatus;
 use sled_agent_types::inventory::Inventory;
 use sled_agent_types::inventory::InventoryDataset;
 use sled_agent_types::inventory::InventoryDisk;
@@ -71,6 +73,7 @@ use sled_agent_types::inventory::ManifestBootInventory;
 use sled_agent_types::inventory::MupdateOverrideBootInventory;
 use sled_agent_types::inventory::OmicronFileSourceResolverInventory;
 use sled_agent_types::inventory::OmicronSledConfig;
+use sled_agent_types::inventory::OmicronSledUpdateDisposition;
 use sled_agent_types::inventory::SledCpuFamily;
 use sled_agent_types::inventory::SledRole;
 use sled_agent_types::inventory::SvcsEnabledNotOnlineResult;
@@ -1518,6 +1521,12 @@ impl Sled {
                         sled_config,
                     ),
                 ),
+                instance_manager_status: InstanceManagerStatus {
+                    update_disposition: CurrentUpdateDisposition::Known(
+                        OmicronSledUpdateDisposition::Available,
+                    ),
+                    num_registered_vmms: 0,
+                },
                 // XXX: return something more reasonable here?
                 file_source_resolver:
                     OmicronFileSourceResolverInventory::new_fake(),
@@ -1704,6 +1713,12 @@ impl Sled {
             ledgered_sled_config: inv_sled_agent.ledgered_sled_config.clone(),
             reconciler_status: inv_sled_agent.reconciler_status.clone(),
             last_reconciliation: inv_sled_agent.last_reconciliation.clone(),
+            instance_manager_status: InstanceManagerStatus {
+                update_disposition: CurrentUpdateDisposition::Known(
+                    OmicronSledUpdateDisposition::Available,
+                ),
+                num_registered_vmms: 0,
+            },
             file_source_resolver: inv_sled_agent.file_source_resolver.clone(),
             smf_services_enabled_not_online: inv_sled_agent
                 .smf_services_enabled_not_online

diff --git a/nexus/src/app/update.rs b/nexus/src/app/update.rs
@@ -919,10 +919,13 @@ mod test {
     use omicron_uuid_kinds::ZpoolUuid;
     use sled_agent_types::disk::M2Slot;
     use sled_agent_types::inventory::ConfigReconcilerInventoryStatus;
+    use sled_agent_types::inventory::CurrentUpdateDisposition;
     use sled_agent_types::inventory::FmdInventory;
+    use sled_agent_types::inventory::InstanceManagerStatus;
     use sled_agent_types::inventory::Inventory;
     use sled_agent_types::inventory::InventoryZpool;
     use sled_agent_types::inventory::OmicronFileSourceResolverInventory;
+    use sled_agent_types::inventory::OmicronSledUpdateDisposition;
     use sled_agent_types::inventory::SledCpuFamily;
     use sled_agent_types::inventory::SledRole;
     use sled_agent_types::inventory::SvcEnabledNotOnline;
@@ -962,6 +965,12 @@ mod test {
             ledgered_sled_config: None,
             reconciler_status: ConfigReconcilerInventoryStatus::NotYetRun,
             last_reconciliation: None,
+            instance_manager_status: InstanceManagerStatus {
+                update_disposition: CurrentUpdateDisposition::Known(
+                    OmicronSledUpdateDisposition::Available,
+                ),
+                num_registered_vmms: 0,
+            },
             file_source_resolver: OmicronFileSourceResolverInventory::new_fake(
             ),
             smf_services_enabled_not_online: smf_services,

diff --git a/openapi/sled-agent/sled-agent-51.0.0-9a12e4.json.gitstub b/openapi/sled-agent/sled-agent-51.0.0-9a12e4.json.gitstub
@@ -0,0 +1 @@
+cb538d50fc99c594c0eecb8e8a577b874dac37d1:openapi/sled-agent/sled-agent-51.0.0-9a12e4.json
diff --git a/.../sled-agent/sled-agent-51.0.0-9a12e4.json → .../sled-agent/sled-agent-52.0.0-fdb190.json b/.../sled-agent/sled-agent-51.0.0-9a12e4.json → .../sled-agent/sled-agent-52.0.0-fdb190.json
@@ -7,7 +7,7 @@
       "url": "https://oxide.computer",
       "email": "api@oxide.computer"
     },
-    "version": "51.0.0"
+    "version": "52.0.0"
   },
   "paths": {
     "/artifacts": {
@@ -4857,6 +4857,42 @@
         ],
         "additionalProperties": false
       },
+      "CurrentUpdateDisposition": {
+        "oneOf": [
+          {
+            "type": "object",
+            "properties": {
+              "disposition": {
+                "type": "string",
+                "enum": [
+                  "config_not_available"
+                ]
+              }
+            },
+            "required": [
+              "disposition"
+            ]
+          },
+          {
+            "type": "object",
+            "properties": {
+              "disposition": {
+                "type": "string",
+                "enum": [
+                  "known"
+                ]
+              },
+              "value": {
+                "$ref": "#/components/schemas/OmicronSledUpdateDisposition"
+              }
+            },
+            "required": [
+              "disposition",
+              "value"
+            ]
+          }
+        ]
+      },
       "DatasetConfig": {
         "description": "Configuration information necessary to request a single dataset.\n\nThese datasets are tracked directly by Nexus.",
         "type": "object",
@@ -5907,6 +5943,23 @@
           }
         ]
       },
+      "InstanceManagerStatus": {
+        "type": "object",
+        "properties": {
+          "num_registered_vmms": {
+            "type": "integer",
+            "format": "uint",
+            "minimum": 0
+          },
+          "update_disposition": {
+            "$ref": "#/components/schemas/CurrentUpdateDisposition"
+          }
+        },
+        "required": [
+          "num_registered_vmms",
+          "update_disposition"
+        ]
+      },
       "InstanceMetadata": {
         "description": "Metadata used to track statistics about an instance.",
         "type": "object",
@@ -6205,6 +6258,9 @@
               }
             ]
           },
+          "instance_manager_status": {
+            "$ref": "#/components/schemas/InstanceManagerStatus"
+          },
           "last_reconciliation": {
             "nullable": true,
             "allOf": [
@@ -6279,6 +6335,7 @@
           "disks",
           "file_source_resolver",
           "fmd",
+          "instance_manager_status",
           "reconciler_status",
           "reference_measurements",
           "reservoir_size",

diff --git a/openapi/sled-agent/sled-agent-latest.json b/openapi/sled-agent/sled-agent-latest.json
@@ -1 +1 @@
-sled-agent-51.0.0-9a12e4.json
+sled-agent-52.0.0-fdb190.json
diff --git a/sled-agent/api/src/lib.rs b/sled-agent/api/src/lib.rs
@@ -22,7 +22,7 @@ use omicron_common::api::internal::{
 use sled_agent_types_versions::{
     latest, v1, v4, v6, v7, v9, v10, v11, v12, v14, v16, v17, v18, v20, v22,
     v24, v25, v26, v28, v29, v30, v31, v32, v33, v34, v37, v39, v40, v41, v42,
-    v43, v46, v47, v48, v49, v50,
+    v43, v46, v47, v48, v49, v50, v51,
 };
 use sled_diagnostics::SledDiagnosticsQueryOutput;
 use slog_error_chain::InlineErrorChain;
@@ -39,6 +39,7 @@ api_versions!([
     // |  example for the next person.
     // v
     // (next_int, IDENT),
+    (52, ADD_INSTANCE_MANAGER_STATUS_TO_INVENTORY),
     (51, MULTIPLE_ZONE_EXTERNAL_IPS),
     (50, TYPED_SLED_CONFIG_GENERATION),
     (49, ADD_UPDATE_DISPOSITION),
@@ -1200,22 +1201,38 @@ pub trait SledAgentApi {
     #[endpoint {
         method = GET,
         path = "/inventory",
-        versions = VERSION_MULTIPLE_ZONE_EXTERNAL_IPS..,
+        versions = VERSION_ADD_INSTANCE_MANAGER_STATUS_TO_INVENTORY..,
     }]
     async fn inventory(
         rqctx: RequestContext<Self::Context>,
     ) -> Result<HttpResponseOk<latest::inventory::Inventory>, HttpError>;
 
     /// Fetch basic information about this sled
     #[endpoint {
+        operation_id = "inventory",
+        method = GET,
+        path = "/inventory",
+        versions = VERSION_MULTIPLE_ZONE_EXTERNAL_IPS..VERSION_ADD_INSTANCE_MANAGER_STATUS_TO_INVENTORY,
+    }]
+    async fn inventory_v51(
+        rqctx: RequestContext<Self::Context>,
+    ) -> Result<HttpResponseOk<v51::inventory::Inventory>, HttpError> {
+        Self::inventory(rqctx).await.map(|HttpResponseOk(inv)| {
+            HttpResponseOk(v51::inventory::Inventory::from(inv))
+        })
+    }
+
+    /// Fetch basic information about this sled
+    #[endpoint {
+        operation_id = "inventory",
         method = GET,
         path = "/inventory",
         versions = VERSION_TYPED_SLED_CONFIG_GENERATION..VERSION_MULTIPLE_ZONE_EXTERNAL_IPS,
     }]
     async fn inventory_v50(
         rqctx: RequestContext<Self::Context>,
     ) -> Result<HttpResponseOk<v50::inventory::Inventory>, HttpError> {
-        let HttpResponseOk(inv) = Self::inventory(rqctx).await?;
+        let HttpResponseOk(inv) = Self::inventory_v51(rqctx).await?;
         v50::inventory::Inventory::try_from(inv)
             .map(HttpResponseOk)
             .map_err(HttpError::from)

diff --git a/sled-agent/config-reconciler/src/handle.rs b/sled-agent/config-reconciler/src/handle.rs
@@ -9,11 +9,11 @@ use omicron_common::disk::DatasetName;
 use sled_agent_types::artifact::ArtifactConfig;
 use sled_agent_types::inventory::ConfigReconcilerInventory;
 use sled_agent_types::inventory::ConfigReconcilerInventoryStatus;
+use sled_agent_types::inventory::CurrentUpdateDisposition;
 use sled_agent_types::inventory::InventoryDataset;
 use sled_agent_types::inventory::InventoryDisk;
 use sled_agent_types::inventory::InventoryZpool;
 use sled_agent_types::inventory::OmicronSledConfig;
-use sled_agent_types::inventory::OmicronSledUpdateDisposition;
 use sled_storage::config::MountConfig;
 use sled_storage::disk::Disk;
 use sled_storage::nested_dataset::NestedDatasetConfig;
@@ -116,13 +116,6 @@ impl ConfigReconcilerSpawnToken {
     }
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-#[cfg_attr(any(test, feature = "testing"), derive(test_strategy::Arbitrary))]
-pub enum CurrentUpdateDisposition {
-    ConfigNotAvailable,
-    Known(OmicronSledUpdateDisposition),
-}
-
 #[derive(Debug, Clone)]
 pub struct UpdateDispositionReceiver {
     // We act as a forwarding watch receiver for the ledger channel that reports
@@ -175,7 +168,7 @@ impl UpdateDispositionReceiver {
     /// never change.
     #[cfg(any(test, feature = "testing"))]
     pub fn fake_static(
-        update_disposition: OmicronSledUpdateDisposition,
+        update_disposition: sled_agent_types::inventory::OmicronSledUpdateDisposition,
     ) -> Self {
         let (receiver, sender) = Self::fake_dynamic(
             CurrentUpdateDisposition::Known(update_disposition),

diff --git a/sled-agent/config-reconciler/src/lib.rs b/sled-agent/config-reconciler/src/lib.rs
@@ -65,7 +65,6 @@ pub use dataset_serialization_task::NestedDatasetMountError;
 pub use handle::AvailableDatasetsReceiver;
 pub use handle::ConfigReconcilerHandle;
 pub use handle::ConfigReconcilerSpawnToken;
-pub use handle::CurrentUpdateDisposition;
 pub use handle::InventoryError;
 pub use handle::ReconcilerInventory;
 pub use handle::TimeSyncConfig;
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		cb538d50fc99c594c0eecb8e8a577b874dac37d1:openapi/sled-agent/sled-agent-51.0.0-9a12e4.json
Original file line number	Diff line number	Diff line change
		@@ -1 +1 @@
		sled-agent-51.0.0-9a12e4.json
		sled-agent-52.0.0-fdb190.json