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In distributed mode the registry can list a model as loaded on a node while the worker has evicted it (autonomous LRU eviction, an out-of-band unload, etc.) yet the backend process survives. The router's cached-node check only verifies the process is alive (probeHealth), so it routes there and inference fails with "<backend>: model not loaded" — and stays broken until the controller restarts and rebuilds its registry. InFlightTrackingClient now reconciles this: when a tracked inference call returns a model-not-loaded error, it drops the stale replica row (RemoveNodeModel) so the next request reloads the model on a healthy node instead of routing back to the evicted one. The original error is returned unchanged; only the registry is corrected. Assisted-by: Claude:claude-opus-4-8 go vet Signed-off-by: Ettore Di Giacinto <mudler@localai.io>
121 lines
6.5 KiB
Go
121 lines
6.5 KiB
Go
package nodes
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import (
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"context"
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"time"
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grpc "github.com/mudler/LocalAI/pkg/grpc"
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)
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// ModelRouter is used by SmartRouter for routing decisions and model lifecycle.
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type ModelRouter interface {
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FindAndLockNodeWithModel(ctx context.Context, modelName string, candidateNodeIDs []string, pref *RoutePreference) (*BackendNode, *NodeModel, error)
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DecrementInFlight(ctx context.Context, nodeID, modelName string, replicaIndex int) error
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IncrementInFlight(ctx context.Context, nodeID, modelName string, replicaIndex int) error
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RemoveNodeModel(ctx context.Context, nodeID, modelName string, replicaIndex int) error
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RemoveAllNodeModelReplicas(ctx context.Context, nodeID, modelName string) error
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TouchNodeModel(ctx context.Context, nodeID, modelName string, replicaIndex int)
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SetNodeModel(ctx context.Context, nodeID, modelName string, replicaIndex int, state, address string, initialInFlight int) error
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SetNodeModelLoadInfo(ctx context.Context, nodeID, modelName string, replicaIndex int, backendType string, optsBlob []byte) error
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UpsertModelLoadInfo(ctx context.Context, modelName, backendType string, optsBlob []byte) error
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GetModelLoadInfo(ctx context.Context, modelName string) (backendType string, optsBlob []byte, err error)
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NextFreeReplicaIndex(ctx context.Context, nodeID, modelName string, maxSlots int) (int, error)
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CountReplicasOnNode(ctx context.Context, nodeID, modelName string) (int, error)
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FindNodeWithVRAM(ctx context.Context, minBytes uint64) (*BackendNode, error)
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FindIdleNode(ctx context.Context) (*BackendNode, error)
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FindLeastLoadedNode(ctx context.Context) (*BackendNode, error)
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FindGlobalLRUModelWithZeroInFlight(ctx context.Context) (*NodeModel, error)
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FindLRUModel(ctx context.Context, nodeID string) (*NodeModel, error)
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Get(ctx context.Context, nodeID string) (*BackendNode, error)
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GetModelScheduling(ctx context.Context, modelName string) (*ModelSchedulingConfig, error)
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FindNodesBySelector(ctx context.Context, selector map[string]string) ([]BackendNode, error)
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FindNodesWithFreeSlot(ctx context.Context, modelName string, candidateNodeIDs []string) ([]BackendNode, error)
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ReserveVRAM(ctx context.Context, nodeID string, bytes uint64) error
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ReleaseVRAM(ctx context.Context, nodeID string, bytes uint64) error
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FindNodeWithVRAMFromSet(ctx context.Context, minBytes uint64, nodeIDs []string) (*BackendNode, error)
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FindIdleNodeFromSet(ctx context.Context, nodeIDs []string) (*BackendNode, error)
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FindLeastLoadedNodeFromSet(ctx context.Context, nodeIDs []string) (*BackendNode, error)
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GetNodeLabels(ctx context.Context, nodeID string) ([]NodeLabel, error)
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FindNodesWithModel(ctx context.Context, modelName string) ([]BackendNode, error)
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LoadedReplicaStats(ctx context.Context, modelName string, candidateNodeIDs []string) ([]ReplicaCandidate, error)
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}
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// ConcurrencyConflictResolver returns the names of configured models that
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// share at least one concurrency group with the given model. It is satisfied
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// by *config.ModelConfigLoader and lets the SmartRouter make group-aware
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// placement decisions without importing the config package's full surface.
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type ConcurrencyConflictResolver interface {
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GetModelsConflictingWith(modelName string) []string
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}
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// NodeHealthStore is used by HealthMonitor for node status management.
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type NodeHealthStore interface {
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List(ctx context.Context) ([]BackendNode, error)
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GetNodeModels(ctx context.Context, nodeID string) ([]NodeModel, error)
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MarkOffline(ctx context.Context, nodeID string) error
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MarkUnhealthy(ctx context.Context, nodeID string) error
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MarkHealthy(ctx context.Context, nodeID string) error
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Heartbeat(ctx context.Context, nodeID string, update *HeartbeatUpdate) error
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FindStaleNodes(ctx context.Context, threshold time.Duration) ([]BackendNode, error)
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RemoveNodeModel(ctx context.Context, nodeID, modelName string, replicaIndex int) error
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}
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// ModelLocator is used by RemoteUnloaderAdapter for model discovery.
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type ModelLocator interface {
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FindNodesWithModel(ctx context.Context, modelName string) ([]BackendNode, error)
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RemoveNodeModel(ctx context.Context, nodeID, modelName string, replicaIndex int) error
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RemoveAllNodeModelReplicas(ctx context.Context, nodeID, modelName string) error
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}
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// ModelLookup is used by DistributedModelStore for model existence queries.
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type ModelLookup interface {
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FindNodeForModel(ctx context.Context, modelName string) (*BackendNode, bool)
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ListAllLoadedModels(ctx context.Context) ([]NodeModel, error)
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Get(ctx context.Context, nodeID string) (*BackendNode, error)
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}
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// InFlightTracker is used by InFlightTrackingClient for request counting.
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type InFlightTracker interface {
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IncrementInFlight(ctx context.Context, nodeID, modelName string, replicaIndex int) error
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DecrementInFlight(ctx context.Context, nodeID, modelName string, replicaIndex int) error
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// RemoveNodeModel drops a stale replica row so the next request reloads the
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// model instead of routing back to a node where it is no longer loaded.
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RemoveNodeModel(ctx context.Context, nodeID, modelName string, replicaIndex int) error
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}
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// NodeManager is used by HTTP endpoints for node registration and lifecycle.
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type NodeManager interface {
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Register(ctx context.Context, node *BackendNode, autoApprove bool) error
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Get(ctx context.Context, nodeID string) (*BackendNode, error)
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GetByName(ctx context.Context, name string) (*BackendNode, error)
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List(ctx context.Context) ([]BackendNode, error)
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Deregister(ctx context.Context, nodeID string) error
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ApproveNode(ctx context.Context, nodeID string) error
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MarkOffline(ctx context.Context, nodeID string) error
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MarkDraining(ctx context.Context, nodeID string) error
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MarkHealthy(ctx context.Context, nodeID string) error
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Heartbeat(ctx context.Context, nodeID string, update *HeartbeatUpdate) error
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GetNodeModels(ctx context.Context, nodeID string) ([]NodeModel, error)
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UpdateAuthRefs(ctx context.Context, nodeID, authUserID, apiKeyID string) error
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RemoveNodeModel(ctx context.Context, nodeID, modelName string, replicaIndex int) error
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RemoveAllNodeModelReplicas(ctx context.Context, nodeID, modelName string) error
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}
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// BackendClientFactory creates gRPC backend clients.
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type BackendClientFactory interface {
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NewClient(address string, parallel bool) grpc.Backend
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}
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// tokenClientFactory is the default BackendClientFactory that creates gRPC
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// clients with an optional bearer token for distributed auth.
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type tokenClientFactory struct {
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token string
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}
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func (f *tokenClientFactory) NewClient(address string, parallel bool) grpc.Backend {
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if f.token != "" {
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return grpc.NewClientWithToken(address, parallel, nil, false, f.token)
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}
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return grpc.NewClient(address, parallel, nil, false)
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}
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