diff --git a/internal/hook/hook.go b/internal/hook/hook.go
index 663cf72b..587ae3bb 100644
--- a/internal/hook/hook.go
+++ b/internal/hook/hook.go
@@ -22,12 +22,14 @@ var (
 )
 
 type HookExecutor struct {
+	config   *v1.Config
 	oplog    *oplog.OpLog
 	logStore *rotatinglog.RotatingLog
 }
 
-func NewHookExecutor(oplog *oplog.OpLog, bigOutputStore *rotatinglog.RotatingLog) *HookExecutor {
+func NewHookExecutor(config *v1.Config, oplog *oplog.OpLog, bigOutputStore *rotatinglog.RotatingLog) *HookExecutor {
 	return &HookExecutor{
+		config:   config,
 		oplog:    oplog,
 		logStore: bigOutputStore,
 	}
@@ -37,10 +39,11 @@ func NewHookExecutor(oplog *oplog.OpLog, bigOutputStore *rotatinglog.RotatingLog
 // Hooks are pulled both from the provided plan and from the repo config.
 func (e *HookExecutor) ExecuteHooks(flowID int64, repo *v1.Repo, plan *v1.Plan, events []v1.Hook_Condition, vars HookVars) error {
 	operationBase := v1.Operation{
-		Status: v1.OperationStatus_STATUS_INPROGRESS,
-		PlanId: plan.GetId(),
-		RepoId: repo.GetId(),
-		FlowId: flowID,
+		Status:     v1.OperationStatus_STATUS_INPROGRESS,
+		PlanId:     plan.GetId(),
+		RepoId:     repo.GetId(),
+		InstanceId: e.config.Instance,
+		FlowId:     flowID,
 	}
 
 	vars.Repo = repo
diff --git a/internal/oplog/migrations.go b/internal/oplog/migrations.go
index ef1e298e..0404118b 100644
--- a/internal/oplog/migrations.go
+++ b/internal/oplog/migrations.go
@@ -13,6 +13,7 @@ import (
 
 var migrations = []func(*OpLog, *bbolt.Tx) error{
 	migration001FlowID,
+	migration002InstanceID,
 }
 
 var CurrentVersion = int64(len(migrations))
@@ -108,3 +109,14 @@ func migration001FlowID(oplog *OpLog, tx *bbolt.Tx) error {
 		return nil
 	})
 }
+
+func migration002InstanceID(oplog *OpLog, tx *bbolt.Tx) error {
+	return transformOperations(oplog, tx, func(op *v1.Operation) error {
+		if op.InstanceId != "" {
+			return nil
+		}
+
+		op.InstanceId = "__unassociated__"
+		return nil
+	})
+}
diff --git a/internal/orchestrator/orchestrator.go b/internal/orchestrator/orchestrator.go
index 5e54e8d9..430f8baa 100644
--- a/internal/orchestrator/orchestrator.go
+++ b/internal/orchestrator/orchestrator.go
@@ -66,10 +66,9 @@ func NewOrchestrator(resticBin string, cfg *v1.Config, oplog *oplog.OpLog, logSt
 		OpLog:  oplog,
 		config: cfg,
 		// repoPool created with a memory store to ensure the config is updated in an atomic operation with the repo pool's config value.
-		repoPool:     newResticRepoPool(resticBin, cfg),
-		taskQueue:    queue.NewTimePriorityQueue[stContainer](),
-		hookExecutor: hook.NewHookExecutor(oplog, logStore),
-		logStore:     logStore,
+		repoPool:  newResticRepoPool(resticBin, cfg),
+		taskQueue: queue.NewTimePriorityQueue[stContainer](),
+		logStore:  logStore,
 	}
 
 	// verify the operation log and mark any incomplete operations as failed.
@@ -383,6 +382,7 @@ func (o *Orchestrator) scheduleTaskHelper(t tasks.Task, priority int, curTime ti
 	}
 
 	if stc.Op != nil {
+		stc.Op.InstanceId = o.config.Instance
 		stc.Op.PlanId = t.PlanID()
 		stc.Op.RepoId = t.RepoID()
 		stc.Op.Status = v1.OperationStatus_STATUS_PENDING
diff --git a/internal/orchestrator/taskrunnerimpl.go b/internal/orchestrator/taskrunnerimpl.go
index 3884e271..4ba30480 100644
--- a/internal/orchestrator/taskrunnerimpl.go
+++ b/internal/orchestrator/taskrunnerimpl.go
@@ -13,8 +13,9 @@ type taskRunnerImpl struct {
 	orchestrator *Orchestrator
 	t            tasks.Task
 	op           *v1.Operation
-	repo         *v1.Repo // cache, populated on first call to Repo()
-	plan         *v1.Plan // cache, populated on first call to Plan()
+	repo         *v1.Repo   // cache, populated on first call to Repo()
+	plan         *v1.Plan   // cache, populated on first call to Plan()
+	config       *v1.Config // cache, populated on first call to Config()
 }
 
 var _ tasks.TaskRunner = &taskRunnerImpl{}
@@ -46,10 +47,12 @@ func newTaskRunnerImpl(orchestrator *Orchestrator, task tasks.Task, op *v1.Opera
 }
 
 func (t *taskRunnerImpl) CreateOperation(op *v1.Operation) error {
+	op.InstanceId = t.orchestrator.config.Instance
 	return t.orchestrator.OpLog.Add(op)
 }
 
 func (t *taskRunnerImpl) UpdateOperation(op *v1.Operation) error {
+	op.InstanceId = t.orchestrator.config.Instance
 	return t.orchestrator.OpLog.Update(op)
 }
 
@@ -84,7 +87,8 @@ func (t *taskRunnerImpl) ExecuteHooks(events []v1.Hook_Condition, vars hook.Hook
 	if t.op != nil {
 		flowID = t.op.FlowId
 	}
-	return t.orchestrator.hookExecutor.ExecuteHooks(flowID, repo, plan, events, vars)
+	executor := hook.NewHookExecutor(t.Config(), t.orchestrator.OpLog, t.orchestrator.logStore)
+	return executor.ExecuteHooks(flowID, repo, plan, events, vars)
 }
 
 func (t *taskRunnerImpl) GetRepo(repoID string) (*v1.Repo, error) {
@@ -104,5 +108,9 @@ func (t *taskRunnerImpl) ScheduleTask(task tasks.Task, priority int) error {
 }
 
 func (t *taskRunnerImpl) Config() *v1.Config {
-	return t.orchestrator.Config()
+	if t.config != nil {
+		return t.config
+	}
+	t.config = t.orchestrator.Config()
+	return t.config
 }
diff --git a/internal/protoutil/validation.go b/internal/protoutil/validation.go
index 3ef89887..2dc639c0 100644
--- a/internal/protoutil/validation.go
+++ b/internal/protoutil/validation.go
@@ -22,6 +22,9 @@ func ValidateOperation(op *v1.Operation) error {
 	if op.PlanId == "" {
 		return errors.New("operation.plan_id is required")
 	}
+	if op.InstanceId == "" {
+		return errors.New("operation.instance_id is required")
+	}
 	if op.SnapshotId != "" {
 		if err := restic.ValidateSnapshotId(op.SnapshotId); err != nil {
 			return fmt.Errorf("operation.snapshot_id is invalid: %w", err)