Improve driver network logging

client/driver/docker.go

@@ -820,9 +820,6 @@ func (d *DockerDriver) Start(ctx *ExecContext, task *structs.Task) (*StartRespon
 
 	// Detect container address
 	ip, autoUse := d.detectIP(container)
-	if ip == "" {
-		d.logger.Printf("[DEBUG] driver.docker: task %s could not detect a container IP", d.taskName)
-	}
 
 	// Create a response with the driver handle and container network metadata
 	resp := &StartResponse{
@@ -863,11 +860,6 @@ func (d *DockerDriver) detectIP(c *docker.Container) (string, bool) {
 		// Linux, nat on Windows)
 		if name != "bridge" && name != "nat" {
 			auto = true
-			d.logger.Printf("[INFO] driver.docker: task %s auto-advertising detected IP %s on network %q",
-				d.taskName, ip, name)
-		} else {
-			d.logger.Printf("[DEBUG] driver.docker task %s detect IP %s on network %q but not auto-advertising",
-				d.taskName, ip, name)
 		}
 
 		break

client/task_runner.go

@@ -1440,6 +1440,21 @@ func (r *TaskRunner) startTask() error {
 
 	}
 
+	// Log driver network information
+	if sresp.Network != nil && sresp.Network.IP != "" {
+		if sresp.Network.AutoAdvertise {
+			r.logger.Printf("[INFO] client: alloc %s task %s auto-advertising detected IP %s",
+				r.alloc.ID, r.task.Name, sresp.Network.IP)
+		} else {
+			r.logger.Printf("[DEBUG] client: alloc %s task %s detected IP %s but not auto-advertising",
+				r.alloc.ID, r.task.Name, sresp.Network.IP)
+		}
+	}
+
+	if sresp.Network == nil || sresp.Network.IP == "" {
+		r.logger.Printf("[DEBUG] client: alloc %s task %s could not detect a driver IP", r.alloc.ID, r.task.Name)
+	}
+
 	// Update environment with the network defined by the driver's Start method.
 	r.envBuilder.SetDriverNetwork(sresp.Network)