job region defaults to client node region if 'global' or none provided (#6064)

api/api.go

@@ -453,8 +453,8 @@ func (c *Client) getNodeClientImpl(nodeID string, timeout time.Duration, q *Quer
 		// If the client is configured for a particular region use that
 		region = c.config.Region
 	default:
-		// No region information is given so use the default.
-		region = "global"
+		// No region information is given so use GlobalRegion as the default.
+		region = GlobalRegion
 	}
 
 	// Get an API client for the node

api/jobs.go

@@ -25,6 +25,13 @@ const (
 
 	// DefaultNamespace is the default namespace.
 	DefaultNamespace = "default"
+
+	// For Job configuration, GlobalRegion is a sentinel region value
+	// that users may specify to indicate the job should be run on
+	// the region of the node that the job was submitted to.
+	// For Client configuration, if no region information is given,
+	// the client node will default to be part of the GlobalRegion.
+	GlobalRegion = "global"
 )
 
 const (
@@ -704,7 +711,7 @@ func (j *Job) Canonicalize() {
 		j.Stop = boolToPtr(false)
 	}
 	if j.Region == nil {
-		j.Region = stringToPtr("global")
+		j.Region = stringToPtr(GlobalRegion)
 	}
 	if j.Namespace == nil {
 		j.Namespace = stringToPtr("default")