fix: 从后端恢复 Runner claim

cmd/gitea-dynamic-runner/controller.go

@@ -158,6 +158,15 @@ func runController(ctx context.Context) error {
 			SPIREAgentID: config.SPIREAgentID, ExecutorUID: config.PodExecutorUID,
 		}}
 		podExecutorBackend = &backend
+		assignments, err := backend.RecoverAssignments(ctx)
+		if err != nil {
+			return err
+		}
+		for _, assignment := range assignments {
+			if err := registry.RecoverClaimed(assignment); err != nil {
+				return fmt.Errorf("recover Pod facade claim %s: %w", assignment.ID, err)
+			}
+		}
 		component, err := workerComponent(ctx, workerJS, config, taskassignment.BackendPod, config.PodCapacity, taskworker.Worker{Backend: backend, Bootstrap: bootstrap}, registry)
 		if err != nil {
 			return err
@@ -178,6 +187,15 @@ func runController(ctx context.Context) error {
 			Env:        map[string]string{"SPIFFE_ENDPOINT_SOCKET": config.WorkloadAPIAddr},
 		}}
 		vmExecutorBackend = &backend
+		assignments, err := backend.RecoverAssignments(ctx, config.TrustDomain)
+		if err != nil {
+			return err
+		}
+		for _, assignment := range assignments {
+			if err := registry.RecoverClaimed(assignment); err != nil {
+				return fmt.Errorf("recover VM facade claim %s: %w", assignment.ID, err)
+			}
+		}
 		component, err := workerComponent(ctx, workerJS, config, taskassignment.BackendVM, config.VMCapacity, taskworker.Worker{Backend: backend, Bootstrap: bootstrap}, registry)
 		if err != nil {
 			return err

internal/opensandboxbackend/backend.go

@@ -108,6 +108,30 @@ type Backend struct {
 	Config    Config
 }
 
+func (b Backend) RecoverAssignments(ctx context.Context, trustDomain string) ([]taskassignment.Assignment, error) {
+	if err := b.validate(); err != nil {
+		return nil, err
+	}
+	result, err := b.Lifecycle.ListSandboxes(ctx, opensandbox.ListOptions{
+		Metadata: map[string]string{"ci.ddupan.top/backend": "vm"}, PageSize: 100,
+	})
+	if err != nil {
+		return nil, fmt.Errorf("list recoverable sandboxes: %w", err)
+	}
+	assignments := make([]taskassignment.Assignment, 0, len(result.Items))
+	for _, sandbox := range result.Items {
+		if sandbox.Metadata[terminalMetadata] == "true" {
+			continue
+		}
+		assignment, err := taskassignment.FromMetadata(sandbox.Metadata, sandbox.Metadata, trustDomain)
+		if err != nil {
+			return nil, fmt.Errorf("recover sandbox %s: %w", sandbox.ID, err)
+		}
+		assignments = append(assignments, assignment)
+	}
+	return assignments, nil
+}
+
 func NewLifecycleClient(baseURL, apiKey string, client *http.Client) *opensandbox.LifecycleClient {
 	if client != nil {
 		return opensandbox.NewLifecycleClient(baseURL, apiKey, opensandbox.WithHTTPClient(client))

internal/podbackend/backend.go

@@ -116,6 +116,28 @@ type Backend struct {
 	Config Config
 }
 
+func (b Backend) RecoverAssignments(ctx context.Context) ([]taskassignment.Assignment, error) {
+	if err := b.validate(); err != nil {
+		return nil, err
+	}
+	pods, err := b.API.ListPods(ctx, b.Config.Namespace, "ci.ddupan.top/backend=pod")
+	if err != nil {
+		return nil, fmt.Errorf("list recoverable assignment Pods: %w", err)
+	}
+	assignments := make([]taskassignment.Assignment, 0, len(pods))
+	for _, pod := range pods {
+		if pod.Labels[terminalLabel] == "true" {
+			continue
+		}
+		assignment, err := taskassignment.FromMetadata(pod.Labels, pod.Annotations, b.Config.TrustDomain)
+		if err != nil {
+			return nil, fmt.Errorf("recover Pod %s: %w", pod.Name, err)
+		}
+		assignments = append(assignments, assignment)
+	}
+	return assignments, nil
+}
+
 func (b Backend) Find(ctx context.Context, assignmentID string) (*taskworker.Executor, error) {
 	if err := b.validate(); err != nil {
 		return nil, err

internal/runnerfacade/facade_test.go

@@ -225,3 +225,15 @@ func TestCapabilitiesAreDeterministicAndAssignmentScoped(t *testing.T) {
 		t.Fatal("capability scope is invalid")
 	}
 }
+
+func TestRegistryRecoversClaimedAssignment(t *testing.T) {
+	registry := NewRegistry()
+	assignment := facadeAssignment(t)
+	if err := registry.RecoverClaimed(assignment); err != nil {
+		t.Fatal(err)
+	}
+	resolved, err := registry.Resolve(assignment.ID, assignment.Identity.SPIFFEID)
+	if err != nil || resolved.Task.GetId() != assignment.Task.GetId() {
+		t.Fatalf("resolved=%#v err=%v", resolved, err)
+	}
+}

internal/runnerfacade/registry.go

@@ -90,3 +90,21 @@ func (r *Registry) Remove(assignmentID string) {
 	defer r.mu.Unlock()
 	delete(r.claims, assignmentID)
 }
+
+// RecoverClaimed restores authorization for an executor that already claimed
+// its task before the controller restarted.
+func (r *Registry) RecoverClaimed(assignment taskassignment.Assignment) error {
+	ready, err := r.Offer(assignment)
+	if err != nil {
+		return err
+	}
+	r.mu.Lock()
+	entry := r.claims[assignment.ID]
+	if !entry.claimed {
+		entry.claimed = true
+		close(entry.ready)
+	}
+	r.mu.Unlock()
+	<-ready
+	return nil
+}

internal/taskassignment/assignment.go

@@ -7,6 +7,7 @@ import (
 	"errors"
 	"fmt"
 	"slices"
+	"strconv"
 
 	"gitea.dev/actionslib/pkg/model"
 	runnerv1 "gitea.dev/actionslib/runner/v1"
@@ -32,6 +33,32 @@ type Assignment struct {
 	Identity taskidentity.Identity
 }
 
+// FromMetadata reconstructs the minimal assignment needed to authorize an
+// already-running executor after a controller restart. Backend metadata was
+// originally derived from the trusted Gitea task and is validated again here.
+func FromMetadata(labels, annotations map[string]string, trustDomain string) (Assignment, error) {
+	taskID, err := strconv.ParseInt(labels["ci.ddupan.top/task-id"], 10, 64)
+	if err != nil || taskID < 1 {
+		return Assignment{}, errors.New("backend metadata has invalid task ID")
+	}
+	backend := Backend(labels["ci.ddupan.top/backend"])
+	if backend != BackendPod && backend != BackendVM {
+		return Assignment{}, errors.New("backend metadata has invalid backend")
+	}
+	id := labels["ci.ddupan.top/assignment-id"]
+	if id != fmt.Sprintf("gitea-task-%d", taskID) {
+		return Assignment{}, errors.New("backend metadata assignment ID does not match task ID")
+	}
+	identity, err := taskidentity.FromMetadata(
+		annotations["ci.ddupan.top/repository"], annotations["ci.ddupan.top/job-key"],
+		annotations["ci.ddupan.top/spiffe-id"], trustDomain,
+	)
+	if err != nil {
+		return Assignment{}, err
+	}
+	return Assignment{ID: id, Backend: backend, Task: &runnerv1.Task{Id: taskID}, Identity: identity}, nil
+}
+
 type envelope struct {
 	Version  int                   `json:"version"`
 	ID       string                `json:"id"`

internal/taskassignment/assignment_test.go

@@ -73,3 +73,18 @@ func TestAssignmentWireRoundTripAndValidation(t *testing.T) {
 		t.Fatal("expected tampered backend to fail")
 	}
 }
+
+func TestFromMetadataRecoversMinimalAssignment(t *testing.T) {
+	assignment, err := FromMetadata(map[string]string{
+		"ci.ddupan.top/assignment-id": "gitea-task-42",
+		"ci.ddupan.top/task-id":       "42",
+		"ci.ddupan.top/backend":       "vm",
+	}, map[string]string{
+		"ci.ddupan.top/repository": "owner/repo",
+		"ci.ddupan.top/job-key":    "publish",
+		"ci.ddupan.top/spiffe-id":  "spiffe://ddupan.top/ci/owner/repo/publish",
+	}, "ddupan.top")
+	if err != nil || assignment.Task.GetId() != 42 || assignment.Backend != BackendVM {
+		t.Fatalf("assignment=%#v err=%v", assignment, err)
+	}
+}

internal/taskidentity/identity.go

@@ -23,6 +23,21 @@ type Identity struct {
 	SPIFFEID   string
 }
 
+// FromMetadata validates identity fields recovered from backend-owned state.
+func FromMetadata(repository, task, spiffeID, trustDomain string) (Identity, error) {
+	parts := strings.Split(repository, "/")
+	if len(parts) != 2 || parts[0] == "" || parts[1] == "" || !safeTaskKey.MatchString(task) {
+		return Identity{}, errors.New("invalid recovered repository or task identity")
+	}
+	expected := "spiffe://" + trustDomain + "/ci/" + strings.Join([]string{
+		sanitize(parts[0]), sanitize(parts[1]), task,
+	}, "/")
+	if spiffeID != expected {
+		return Identity{}, fmt.Errorf("recovered SPIFFE ID %q does not match %q", spiffeID, expected)
+	}
+	return Identity{Repository: repository, Task: task, SPIFFEID: spiffeID}, nil
+}
+
 // FromTask derives the repository/task SPIFFE ID from Gitea's trusted task
 // context. Workflow input never supplies or overrides the resulting ID.
 func FromTask(task *runnerv1.Task, trustDomain string) (Identity, error) {