feat: extract deploymentType as interface

Author: julienmancuso

deploy/cloud/operator/internal/dynamo/backend_vllm.go

@@ -8,6 +8,10 @@ import (
 	corev1 "k8s.io/api/core/v1"
 )
 
+const (
+	VLLMPort = "6379"
+)
+
 type VLLMBackend struct{}
 
 func (b *VLLMBackend) UpdateContainer(container *corev1.Container, numberOfNodes int32, role Role, component *v1alpha1.DynamoComponentDeploymentOverridesSpec, serviceName string, multinodeDeployer MultinodeDeployer) {
@@ -36,11 +40,11 @@ func updateVLLMMultinodeArgs(container *corev1.Container, role Role, serviceName
 	case RoleLeader:
 		if len(container.Args) > 0 {
 			// Prepend ray start --head command to existing args
-			container.Args = []string{fmt.Sprintf("ray start --head --port=6379 && %s", strings.Join(container.Args, " "))}
+			container.Args = []string{fmt.Sprintf("ray start --head --port=%s && %s", VLLMPort, strings.Join(container.Args, " "))}
 		}
 	case RoleWorker:
 		// Worker nodes only run Ray, completely replace args
 		leaderHostname := multinodeDeployer.GetLeaderHostname(serviceName)
-		container.Args = []string{fmt.Sprintf("ray start --address=%s:6379 --block", leaderHostname)}
+		container.Args = []string{fmt.Sprintf("ray start --address=%s:%s --block", leaderHostname, VLLMPort)}
 	}
 }