# KubernetesGatewayResource.withHostname

- Module: [Aspire.Hosting.Kubernetes](/reference/api/typescript/aspire.hosting.kubernetes.md)
- Defined on: [KubernetesGatewayResource](/reference/api/typescript/aspire.hosting.kubernetes/kubernetesgatewayresource.md)
- Version: `13.4.0-preview.1.26281.18`
- Kind: `method`

Adds a hostname that this gateway's routes match. Multiple hostnames can be added by calling this method repeatedly. Hostnames are used as `hostnames` in generated `HTTPRoute` resources and as HTTPS listener hostnames when TLS is configured.

## Definition

```typescript
interface KubernetesGatewayResource {
  // ... omitted for brevity
  withHostname(hostname: string): KubernetesGatewayResource;
}
```

## Signature

```typescript
withHostname(hostname: string): KubernetesGatewayResource
```

## Parameters

- `hostname` (`string`)

## Returns

[KubernetesGatewayResource](/reference/api/typescript/aspire.hosting.kubernetes/kubernetesgatewayresource.md) `builder`

## Defined on

- [KubernetesGatewayResource](/reference/api/typescript/aspire.hosting.kubernetes/kubernetesgatewayresource.md) -- `handle`