Change the unique namespace on the node

nomad/structs/node_class.go

@@ -82,7 +82,7 @@ func EscapedConstraints(constraints []*Constraint) []*Constraint {
 // computed node class optimization.
 func constraintTargetEscapes(target string) bool {
 	switch {
-	case strings.HasPrefix(target, "$unique."):
+	case strings.HasPrefix(target, "$node.unique."):
 		return true
 
 	case strings.HasPrefix(target, "$attr."):

scheduler/feasible.go

@@ -296,13 +296,13 @@ func resolveConstraintTarget(target string, node *structs.Node) (interface{}, bo
 
 	// Handle the interpolations
 	switch {
-	case "$unique.node.id" == target:
+	case "$node.unique.id" == target:
 		return node.ID, true
 
 	case "$node.datacenter" == target:
 		return node.Datacenter, true
 
-	case "$unique.node.name" == target:
+	case "$node.unique.name" == target:
 		return node.Name, true
 
 	case "$node.class" == target:

scheduler/feasible_test.go

@@ -189,7 +189,7 @@ func TestResolveConstraintTarget(t *testing.T) {
 	node := mock.Node()
 	cases := []tcase{
 		{
-			target: "$unique.node.id",
+			target: "$node.unique.id",
 			node:   node,
 			val:    node.ID,
 			result: true,
@@ -201,7 +201,7 @@ func TestResolveConstraintTarget(t *testing.T) {
 			result: true,
 		},
 		{
-			target: "$unique.node.name",
+			target: "$node.unique.name",
 			node:   node,
 			val:    node.Name,
 			result: true,