Feature/add host aliases to pod

composer.json

@@ -42,7 +42,10 @@
         "vimeo/psalm": "^4.20"
     },
     "config": {
-        "sort-packages": true
+        "sort-packages": true,
+        "allow-plugins": {
+            "composer/package-versions-deprecated": true
+        }
     },
     "minimum-stability": "dev"
 }

src/Instances/HostAlias.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace RenokiCo\PhpK8s\Instances;
+
+class HostAlias extends Instance
+{
+    public function setHostAlias(string $ip, string ...$hostnames): self
+    {
+        foreach ($hostnames as $hostname) {
+            $this->addToAttribute('hostnames', $hostname);
+        }
+
+        return $this->setAttribute('ip', $ip);
+    }
+}

src/Kinds/K8sPod.php

@@ -10,6 +10,7 @@
 use RenokiCo\PhpK8s\Contracts\Watchable;
 use RenokiCo\PhpK8s\Instances\Affinity;
 use RenokiCo\PhpK8s\Instances\Container;
+use RenokiCo\PhpK8s\Instances\HostAlias;
 use RenokiCo\PhpK8s\Instances\Volume;
 use RenokiCo\PhpK8s\K8s;
 use RenokiCo\PhpK8s\Traits\Resource\HasSpec;
@@ -483,4 +484,40 @@
     {
         return $this->getPhase() === 'Succeeded';
     }
+
+    /**
+     * Set the host aliases.
+     *
+     * @param  array  $hostAliases
+     * @return $this
+     */
+    public function setHostAliases(array $hostAliases)
+    {
+        foreach ($hostAliases as &$hostAlias) {
+            if ($hostAlias instanceof HostAlias) {
+                $hostAlias = $hostAlias->toArray();
+            }
+        }
+
+        return $this->setSpec('hostAliases', $hostAliases);
+    }
+
+    /**
+     * Get the volumes.
+     *
+     * @param  bool  $asInstance
+     * @return array
+     */
+    public function getHostAliases(bool $asInstance = true)
+    {
+        $hostAliases = $this->getSpec('hostAliases', []);
+
+        if ($asInstance) {
+            foreach ($hostAliases as &$hostAlias) {
+                $hostAlias = new HostAlias($hostAlias);
+            }
+        }
+
+        return $hostAliases;
+    }
 }

src/Traits/InitializesInstances.php

@@ -5,6 +5,7 @@
 use RenokiCo\PhpK8s\Instances\Affinity;
 use RenokiCo\PhpK8s\Instances\Container;
 use RenokiCo\PhpK8s\Instances\Expression;
+use RenokiCo\PhpK8s\Instances\HostAlias;
 use RenokiCo\PhpK8s\Instances\Probe;
 use RenokiCo\PhpK8s\Instances\ResourceMetric;
 use RenokiCo\PhpK8s\Instances\ResourceObject;
@@ -124,4 +125,15 @@
     {
         return new Webhook($attributes);
     }
+
+    /**
+     * Create a new webhook instance.
+     *
+     * @param  array  $attributes
+     * @return \RenokiCo\PhpK8s\Instances\HostAlias
+     */
+    public static function hostAlias(array $attributes = [])
+    {
+        return new HostAlias($attributes);
+    }
 }

tests/HostAlias.php

@@ -0,0 +1,71 @@
+<?php
+
+namespace RenokiCo\PhpK8s\Test;
+
+use RenokiCo\PhpK8s\K8s;
+
+class HostAlias extends TestCase
+{
+    public function test_single_host_alias()
+    {
+        $hostAlias = K8s::hostAlias()
+            ->setHostAlias(
+                '127.0.0.1',
+                'my-fancy-host',
+            );
+
+        $mysql = K8s::container()
+            ->setName('mysql')
+            ->setImage('mysql', '5.7');
+
+        $pod = K8s::pod()
+            ->setName('mysql')
+            ->setContainers([$mysql])
+            ->setHostAliases([$hostAlias]);
+
+        $this->assertEquals([
+            'ip' => '127.0.0.1',
+            'hostnames' => ['my-fancy-host'],
+        ], $hostAlias->toArray());
+
+        $this->assertEquals($pod->getHostAliases()[0]->toArray(), $hostAlias->toArray());
+    }
+
+    public function test_multiple_host_aliases()
+    {
+        $hostAlias1 = K8s::hostAlias()
+            ->setHostAlias(
+                '127.0.0.1',
+                'my-fancy-host',
+            );
+
+        $hostAlias2 = K8s::hostAlias()
+            ->setHostAlias(
+                '127.0.0.2',
+                'my-fancy-host-2',
+                'my-fancy-host-3',
+            );
+
+        $mysql = K8s::container()
+            ->setName('mysql')
+            ->setImage('mysql', '5.7');
+
+        $pod = K8s::pod()
+            ->setName('mysql')
+            ->setContainers([$mysql])
+            ->setHostAliases([$hostAlias1, $hostAlias2]);
+
+        $this->assertEquals([
+            'ip' => '127.0.0.1',
+            'hostnames' => ['my-fancy-host'],
+        ], $hostAlias1->toArray());
+
+        $this->assertEquals([
+            'ip' => '127.0.0.2',
+            'hostnames' => ['my-fancy-host-2', 'my-fancy-host-3'],
+        ], $hostAlias2->toArray());
+
+        $this->assertEquals($pod->getHostAliases()[0]->toArray(), $hostAlias1->toArray());
+        $this->assertEquals($pod->getHostAliases()[1]->toArray(), $hostAlias2->toArray());
+    }
+}