# Service Exposure To invoke the service functionality provided by a workload both within and outside the cluster, services are defined using Cluster IP and Node Port methods. If services are defined using the Node Port method in a cloud-configured cluster, a load balancer can be configured in front of it, allowing external invocation of services through the load balancer address and port. ## What types of service exposure do you support? * Cluster IP: Groups pods set with the same label to perform load balancing (not in round-robin but random connection), facilitating internal communication. * Node Port: Distributes the same port to each POD, performs load balancing using Cluster IP and port, and allows external exposure. * **When using Node Port, you need to register the Node Port for KT LB to use it.** * **For inquiries regarding KT firewall and LB Port Open, please contact MSP directly.** ## What are the benefits of service exposure? ### **Easy Service Creation** Users can easily create various service exposure types through the web UI console. ### **Automatic Load Balancer Creation** When a cluster is configured in a public cloud, Cocktail Cloud automatically creates a load balancer. Service exposure using the load balancer type is possible only on clouds that support it, such as AWS, Azure, and GCP. ## **Task List** * Create services * View services ## 1. **Create Services** ### 1.1 Navigate to the service exposure screen 1\) Select \[Application] - \[Service Map], then click the "+ Create" button to move to the service exposure screen.

### 1.2 Choose the service exposure type 1\) Select ClusterIP or Nodeport as needed.

{% hint style="danger" %} \[For KT customers] When creating a Node Port type service, you need to contact MSP for load balancer creation and firewall setup. {% endhint %} ### 1.3 Enter basic service exposure information 1\) Enter basic service exposure information.

Item (* is required)	Content
Service Exposure Name*	Write the service exposure name you want to create
Service Expose type	It is displayed according to the type selected when creating the service exposure
Sticky Session	If you want to use Sticky Session, check TRUE and enter the session timeout
Headless Service	If you want to use Headless Service, check its availability
Label selector*	Select the workload and label you want to connect to the service
Label	Input labels to be registered for service exposure
Annotation	Input comments to be registered for service exposure

2\) Click "Label Selector," choose the workload and label to connect the service to, then click the "+ Add" button. 3\) Confirm that the selected label is displayed at the bottom as Key, Value, and click the "Apply" button.

[Screen] Select labels set in the workload to add as service labels

[Screen] Select existing labels set in the workload to input as service labels

{% hint style="info" %} You can either select labels pre-set in the workload or directly input a label name and value. {% endhint %}

[Screen] Enter Label Information for Service as Name-Value Pair

{% hint style="info" %} When directly adding a workload, input fields for Key and Value will be added at the bottom, and you can enter them directly. {% endhint %} ### 1.4 Configure service target ports 1\) In the service exposure settings, click the "Edit" button in the Target Ports section. 2\) Click "+ Add," then enter the Name, Protocol, Target Port, and Service Port at the bottom. {% hint style="info" %} Name, Protocol, Target Port, and Service Port are mandatory, and you can choose between TCP and UDP for the protocol. {% endhint %}

[Screen] Configure Target Ports for Service

### 1.5 Save the configuration After completing the information input, click the "Save" button to create the service. ## 2. **View Services** Search the generated service information on the service exposure screen of the service map. ### 2.1 View the list of services 1\) Access the service exposure screen in the service map to check the list of created services.

### 2.2 View detailed service information 1\) Click on the service name displayed in the service list to view the service's configuration and status information.

[Screen] View Service Configuration and Status Information

2\) You can also view service configuration and status information in YAML format by clicking the settings button on the top screen, then selecting "YAML View" from the left checkbox.