feat: Providing some clusters for kubernetes

examples/kubernetes/clusters/postgres.rhai

@@ -0,0 +1,45 @@
+//! PostgreSQL Cluster Deployment Example (Rhai)
+//!
+//! This script shows how to deploy a PostgreSQL cluster using Rhai scripting
+//! with the KubernetesManager convenience methods.
+
+print("=== PostgreSQL Cluster Deployment ===");
+
+// Create Kubernetes manager for the database namespace
+print("Creating Kubernetes manager for 'database' namespace...");
+let km = kubernetes_manager_new("database");
+print("✓ Kubernetes manager created");
+
+// Create PostgreSQL cluster using the convenience method
+print("\nDeploying PostgreSQL cluster...");
+
+try {
+    // Deploy PostgreSQL using the convenience method
+    let result = deploy_application(km, "postgres-cluster", "postgres:15", 2, 5432, #{
+        "app": "postgres-cluster",
+        "type": "database",
+        "engine": "postgresql"
+    });
+    print("✓ " + result);
+
+    print("\n✅ PostgreSQL cluster deployed successfully!");
+
+    print("\n📋 Connection Information:");
+    print("  Host: postgres-cluster.database.svc.cluster.local");
+    print("  Port: 5432");
+    print("  Database: postgres (default)");
+    print("  Username: postgres (default)");
+
+    print("\n🔧 To connect from another pod:");
+    print("  psql -h postgres-cluster.database.svc.cluster.local -U postgres");
+
+    print("\n💡 Next steps:");
+    print("  • Set POSTGRES_PASSWORD environment variable");
+    print("  • Configure persistent storage");
+    print("  • Set up backup and monitoring");
+
+} catch(e) {
+    print("❌ Failed to deploy PostgreSQL cluster: " + e);
+}
+
+print("\n=== Deployment Complete ===");