set node.StatusUpdatedAt in raft

Fix a case where `node.StatusUpdatedAt` was manipulated directly in
memory.

This ensures that StatusUpdatedAt is set in raft layer, and ensures that
the field is updated when node drain/eligibility is updated too.

nomad/drainer_shims.go

@@ -1,6 +1,10 @@
 package nomad
 
-import "github.com/hashicorp/nomad/nomad/structs"
+import (
+	"time"
+
+	"github.com/hashicorp/nomad/nomad/structs"
+)
 
 // drainerShim implements the drainer.RaftApplier interface required by the
 // NodeDrainer.
@@ -13,6 +17,7 @@ func (d drainerShim) NodesDrainComplete(nodes []string, event *structs.NodeEvent
 		Updates:      make(map[string]*structs.DrainUpdate, len(nodes)),
 		NodeEvents:   make(map[string]*structs.NodeEvent, len(nodes)),
 		WriteRequest: structs.WriteRequest{Region: d.s.config.Region},
+		UpdatedAt:    time.Now().Unix(),
 	}
 
 	update := &structs.DrainUpdate{}

nomad/fsm.go

@@ -310,7 +310,7 @@ func (n *nomadFSM) applyStatusUpdate(buf []byte, index uint64) interface{} {
 		panic(fmt.Errorf("failed to decode request: %v", err))
 	}
 
-	if err := n.state.UpdateNodeStatus(index, req.NodeID, req.Status, req.NodeEvent); err != nil {
+	if err := n.state.UpdateNodeStatus(index, req.NodeID, req.Status, req.UpdatedAt, req.NodeEvent); err != nil {
 		n.logger.Error("UpdateNodeStatus failed", "error", err)
 		return err
 	}
@@ -352,7 +352,7 @@ func (n *nomadFSM) applyDrainUpdate(buf []byte, index uint64) interface{} {
 		}
 	}
 
-	if err := n.state.UpdateNodeDrain(index, req.NodeID, req.DrainStrategy, req.MarkEligible, req.NodeEvent); err != nil {
+	if err := n.state.UpdateNodeDrain(index, req.NodeID, req.DrainStrategy, req.MarkEligible, req.UpdatedAt, req.NodeEvent); err != nil {
 		n.logger.Error("UpdateNodeDrain failed", "error", err)
 		return err
 	}
@@ -366,7 +366,7 @@ func (n *nomadFSM) applyBatchDrainUpdate(buf []byte, index uint64) interface{} {
 		panic(fmt.Errorf("failed to decode request: %v", err))
 	}
 
-	if err := n.state.BatchUpdateNodeDrain(index, req.Updates, req.NodeEvents); err != nil {
+	if err := n.state.BatchUpdateNodeDrain(index, req.UpdatedAt, req.Updates, req.NodeEvents); err != nil {
 		n.logger.Error("BatchUpdateNodeDrain failed", "error", err)
 		return err
 	}
@@ -387,7 +387,7 @@ func (n *nomadFSM) applyNodeEligibilityUpdate(buf []byte, index uint64) interfac
 		return err
 	}
 
-	if err := n.state.UpdateNodeEligibility(index, req.NodeID, req.Eligibility, req.NodeEvent); err != nil {
+	if err := n.state.UpdateNodeEligibility(index, req.NodeID, req.Eligibility, req.UpdatedAt, req.NodeEvent); err != nil {
 		n.logger.Error("UpdateNodeEligibility failed", "error", err)
 		return err
 	}

nomad/node_endpoint.go

@@ -369,7 +369,7 @@ func (n *Node) UpdateStatus(args *structs.NodeUpdateStatusRequest, reply *struct
 	// to track SecretIDs.
 
 	// Update the timestamp of when the node status was updated
-	node.StatusUpdatedAt = time.Now().Unix()
+	args.UpdatedAt = time.Now().Unix()
 
 	// Commit this update via Raft
 	var index uint64
@@ -484,6 +484,9 @@ func (n *Node) UpdateDrain(args *structs.NodeUpdateDrainRequest,
 		return fmt.Errorf("node not found")
 	}
 
+	// Update the timestamp of when the node status was updated
+	args.UpdatedAt = time.Now().Unix()
+
 	// COMPAT: Remove in 0.9. Attempt to upgrade the request if it is of the old
 	// format.
 	if args.Drain && args.DrainStrategy == nil {
@@ -589,6 +592,9 @@ func (n *Node) UpdateEligibility(args *structs.NodeUpdateEligibilityRequest,
 		return fmt.Errorf("invalid scheduling eligibility %q", args.Eligibility)
 	}
 
+	// Update the timestamp of when the node status was updated
+	args.UpdatedAt = time.Now().Unix()
+
 	// Construct the node event
 	args.NodeEvent = structs.NewNodeEvent().SetSubsystem(structs.NodeEventSubsystemCluster)
 	if node.SchedulingEligibility == args.Eligibility {

nomad/state/state_store.go

@@ -732,7 +732,7 @@ func (s *StateStore) DeleteNode(index uint64, nodeID string) error {
 }
 
 // UpdateNodeStatus is used to update the status of a node
-func (s *StateStore) UpdateNodeStatus(index uint64, nodeID, status string, event *structs.NodeEvent) error {
+func (s *StateStore) UpdateNodeStatus(index uint64, nodeID, status string, updatedAt int64, event *structs.NodeEvent) error {
 	txn := s.db.Txn(true)
 	defer txn.Abort()
 
@@ -748,6 +748,7 @@ func (s *StateStore) UpdateNodeStatus(index uint64, nodeID, status string, event
 	// Copy the existing node
 	existingNode := existing.(*structs.Node)
 	copyNode := existingNode.Copy()
+	copyNode.StatusUpdatedAt = updatedAt
 
 	// Add the event if given
 	if event != nil {
@@ -771,11 +772,11 @@ func (s *StateStore) UpdateNodeStatus(index uint64, nodeID, status string, event
 }
 
 // BatchUpdateNodeDrain is used to update the drain of a node set of nodes
-func (s *StateStore) BatchUpdateNodeDrain(index uint64, updates map[string]*structs.DrainUpdate, events map[string]*structs.NodeEvent) error {
+func (s *StateStore) BatchUpdateNodeDrain(index uint64, updatedAt int64, updates map[string]*structs.DrainUpdate, events map[string]*structs.NodeEvent) error {
 	txn := s.db.Txn(true)
 	defer txn.Abort()
 	for node, update := range updates {
-		if err := s.updateNodeDrainImpl(txn, index, node, update.DrainStrategy, update.MarkEligible, events[node]); err != nil {
+		if err := s.updateNodeDrainImpl(txn, index, node, update.DrainStrategy, update.MarkEligible, updatedAt, events[node]); err != nil {
 			return err
 		}
 	}
@@ -785,19 +786,19 @@ func (s *StateStore) BatchUpdateNodeDrain(index uint64, updates map[string]*stru
 
 // UpdateNodeDrain is used to update the drain of a node
 func (s *StateStore) UpdateNodeDrain(index uint64, nodeID string,
-	drain *structs.DrainStrategy, markEligible bool, event *structs.NodeEvent) error {
+	drain *structs.DrainStrategy, markEligible bool, updatedAt int64, event *structs.NodeEvent) error {
 
 	txn := s.db.Txn(true)
 	defer txn.Abort()
-	if err := s.updateNodeDrainImpl(txn, index, nodeID, drain, markEligible, event); err != nil {
+	if err := s.updateNodeDrainImpl(txn, index, nodeID, drain, markEligible, updatedAt, event); err != nil {
 		return err
 	}
 	txn.Commit()
 	return nil
 }
 
 func (s *StateStore) updateNodeDrainImpl(txn *memdb.Txn, index uint64, nodeID string,
-	drain *structs.DrainStrategy, markEligible bool, event *structs.NodeEvent) error {
+	drain *structs.DrainStrategy, markEligible bool, updatedAt int64, event *structs.NodeEvent) error {
 
 	// Lookup the node
 	existing, err := txn.First("nodes", "id", nodeID)
@@ -811,6 +812,7 @@ func (s *StateStore) updateNodeDrainImpl(txn *memdb.Txn, index uint64, nodeID st
 	// Copy the existing node
 	existingNode := existing.(*structs.Node)
 	copyNode := existingNode.Copy()
+	copyNode.StatusUpdatedAt = updatedAt
 
 	// Add the event if given
 	if event != nil {
@@ -840,7 +842,7 @@ func (s *StateStore) updateNodeDrainImpl(txn *memdb.Txn, index uint64, nodeID st
 }
 
 // UpdateNodeEligibility is used to update the scheduling eligibility of a node
-func (s *StateStore) UpdateNodeEligibility(index uint64, nodeID string, eligibility string, event *structs.NodeEvent) error {
+func (s *StateStore) UpdateNodeEligibility(index uint64, nodeID string, eligibility string, updatedAt int64, event *structs.NodeEvent) error {
 
 	txn := s.db.Txn(true)
 	defer txn.Abort()
@@ -857,6 +859,7 @@ func (s *StateStore) UpdateNodeEligibility(index uint64, nodeID string, eligibil
 	// Copy the existing node
 	existingNode := existing.(*structs.Node)
 	copyNode := existingNode.Copy()
+	copyNode.StatusUpdatedAt = updatedAt
 
 	// Add the event if given
 	if event != nil {

nomad/structs/structs.go

@@ -347,6 +347,7 @@ type NodeUpdateStatusRequest struct {
 	NodeID    string
 	Status    string
 	NodeEvent *NodeEvent
+	UpdatedAt int64
 	WriteRequest
 }
 
@@ -367,6 +368,9 @@ type NodeUpdateDrainRequest struct {
 	// NodeEvent is the event added to the node
 	NodeEvent *NodeEvent
 
+	// UpdatedAt represents server time of receiving request
+	UpdatedAt int64
+
 	WriteRequest
 }
 
@@ -379,6 +383,9 @@ type BatchNodeUpdateDrainRequest struct {
 	// NodeEvents is a mapping of the node to the event to add to the node
 	NodeEvents map[string]*NodeEvent
 
+	// UpdatedAt represents server time of receiving request
+	UpdatedAt int64
+
 	WriteRequest
 }
 
@@ -399,6 +406,9 @@ type NodeUpdateEligibilityRequest struct {
 	// NodeEvent is the event added to the node
 	NodeEvent *NodeEvent
 
+	// UpdatedAt represents server time of receiving request
+	UpdatedAt int64
+
 	WriteRequest
 }