app.component.html

<div>
  <button class="add" title="add cluster" (click)="add()">Añadir</button>
  <ul *ngFor="let cluster of clusters">
    <li>
      ID: {{ cluster.id }}, Name: {{ cluster.name }}
      <button class="detail" title="detail cluster" (click)="detail(cluster)">Detalle</button>
      <button class="update" title="update cluster" (click)="update(cluster)">Actualizar</button>
      <button class="delete" title="delete cluster" (click)="delete(cluster)">Eliminar</button>
    </li>
  </ul>
</div>