+ [task#121514] Show volume metrics.

module/instance/model.php

@@ -10,6 +10,7 @@ declare(strict_types=1);
  * @version   $Id$
  * @link      https://www.zentao.net
  * @property  actionModel $action
+ * @property  cneModel $cne
  */
 class instanceModel extends model
 {
@@ -958,6 +959,31 @@ class instanceModel extends model
         return array('color' => $color, 'tip' => $tip, 'rate' => $rate . '%', 'usage' => helper::formatKB($metrics->usage), 'limit' => helper::formatKB($metrics->limit));
     }
 
+    /**
+     * 打印存储使用信息。
+     * Print the volume usage.
+     *
+     * @param  object $instance
+     * @param  object $metrics
+     * @static
+     * @access public
+     * @return array
+     */
+    public static function printVolUsage(object $instance, object $metrics): array
+    {
+        if($instance->source === 'user') return array('color' => '', 'tip' => '', 'rate' => '', 'usage' => '', 'limit' => '');
+        $rate = $instance->status == 'stopped' ? 0 : $metrics->rate;
+        $tip  = "{$rate}% = " . helper::formatKB($metrics->usage) . ' / ' . helper::formatKB($metrics->limit);
+
+        if(empty($color) && $rate == 0)               $color = 'gray';
+        if(empty($color) && $rate > 0 && $rate < 50)  $color = 'secondary';
+        if(empty($color) && $rate >= 0 && $rate < 70) $color = 'warning';
+        if(empty($color) && $rate >= 0 && $rate < 90) $color = 'important';
+        if(empty($color) && $rate >= 80)              $color = 'danger';
+
+        return array('color' => $color, 'tip' => $tip, 'rate' => $rate . '%', 'usage' => helper::formatKB($metrics->usage), 'limit' => helper::formatKB($metrics->limit));
+    }
+
     /**
      * 检查内存是否充足。
      * Check the free memory of cluster is enough to install app.