Ícone esquerdo com primng
<span class="p-input-icon-left">
<i class="pi pi-search"></i>
<input type="text" pInputText [(ngModel)]="value1" placeholder="Search">
</span>
<span class="p-input-icon-right">
<i class="pi pi-spin pi-spinner"></i>
<input type="text" pInputText [(ngModel)]="value2" >
</span>
Horrible Herring