---
title: "Listing, pagination & watch — Kubernetes API for Laravel | Roundly"
description: "Label and field selectors, all-namespace listing, continue-token pagination, lazy iteration and real-time watch streams."
url: https://roundly-consulting.com/open-source/docs/kubernetes-api-for-laravel/listing
language: en
---

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[Kubernetes API for Laravel](https://roundly-consulting.com/open-source/docs/kubernetes-api-for-laravel.md)

# Listing, pagination & watch

Push filtering to the apiserver instead of fetching everything. Selector methods build the labelSelector and fieldSelector query parameters and chain freely — several selectors are joined with a comma:

```php
use RoundlyConsulting\KubernetesApi\Resources\Pod;

// Label and field selectors build the labelSelector / fieldSelector query params.
$pods = $cluster->pods()
    ->setNamespace('shop')
    ->whereLabel('app', 'checkout')
    ->whereLabelIn('tier', ['web', 'api'])
    ->whereLabelExists('team')
    ->whereLabelMissing('canary')
    ->whereField('status.phase', 'Running')
    ->limit(100)
    ->get();

$pods->map(fn (Pod $pod): string => $pod->getName());
```

| Method | Sends |
| --- | --- |
| `whereLabel('app', 'web')` | `labelSelector=app=web` |
| `whereLabelNot('tier', 'cache')` | `tier!=cache` |
| `whereLabelIn('zone', ['a', 'b'])` | `zone in (a,b)` |
| `whereLabelNotIn('zone', ['c'])` | `zone notin (c)` |
| `whereLabelExists('team')` | `team` |
| `whereLabelMissing('deprecated')` | `!deprecated` |
| `whereField('status.phase', 'Running')` | `fieldSelector=status.phase=Running` |
| `whereFieldNot('status.phase', 'Failed')` | `status.phase!=Failed` |
| `limit(100) · continueFrom($token)` | `limit=100 · continue=<token>` |
| `allNamespaces()` | Lists from the cluster-wide path instead of one namespace. |

Label keys and values are checked against the Kubernetes label grammar before anything is sent — a key is an optional DNS-subdomain prefix and / followed by a name of at most 63 characters, a value is empty or such a name. A comma, =, parenthesis or space, which would widen or rewrite the selector — whereLabelIn('tenant', \['acme,globex'\]) — throws InvalidResourceException. An empty whereLabelIn('app', \[\]) is sent as app in (), which the apiserver reads as app="". Field selectors are not validated.

## Pagination and lazy iteration

limit() caps a page and getPage() returns a ResourcePage with the items and the apiserver’s pagination metadata. lazy() and each() follow continue tokens for you, keeping one page in memory at a time — pair them with limit() to set the page size. They leave the builder’s own continue token as it was, so a second lazy() or a get() on the same builder starts from the same place:

```php
use RoundlyConsulting\KubernetesApi\Resources\Pod;

// List across every namespace.
$all = $cluster->pods()->allNamespaces()->whereLabel('app', 'checkout')->get();

// Page explicitly with a continue token.
$page = $cluster->pods()->setNamespace('shop')->limit(50)->getPage();
$page->items;               // ResourcesCollection
$page->continue;            // ?string — pass to ->continueFrom(...) for the next page
$page->remainingItemCount;  // ?int
$page->hasMore();           // bool

if ($page->hasMore()) {
    $next = $cluster->pods()->setNamespace('shop')->limit(50)->continueFrom($page->continue)->getPage();
}

// Or iterate every item lazily, auto-following continue tokens.
foreach ($cluster->pods()->allNamespaces()->limit(200)->lazy() as $pod) {
    // one page in memory at a time
}

$cluster->pods()->allNamespaces()->limit(200)->each(function (Pod $pod): void {
    // ...
});
```

## Watching for changes

watch() opens a streaming watch over the same listing — selectors and allNamespaces() apply — and calls your callback with a WatchEvent for every change until the connection ends. A second argument adds query parameters to the watch request:

```php
use RoundlyConsulting\KubernetesApi\DataTransferObjects\WatchEvent;

$cluster->pods()
    ->setNamespace('shop')
    ->whereLabel('app', 'checkout')
    ->watch(function (WatchEvent $event): void {
        $event->type;       // ADDED / MODIFIED / DELETED
        $event->object;     // the Pod resource

        if ($event->isDeleted()) {
            logger()->warning("Pod {$event->object->getName()} was deleted");
        }
    });
```

WatchEvent exposes type and object plus isAdded(), isModified() and isDeleted(). Each event reaches the callback as soon as the apiserver sends it, and watch() returns when the stream ends:

- when the apiserver closes the watch — it does so on its own timeout, usually after 30–60 minutes;
- after client.stream\_timeout seconds of silence, if you set one (0, the default, waits indefinitely).

The request timeout in client.options only bounds connecting and the response headers. A connection that breaks off mid-stream throws Laravel’s ConnectionException. Long-lived watches suit queued or console contexts, not web requests — re-open the watch in a loop if you need it to run forever.

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