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How-to guides

1: LB Server Groups
2: LB Health Check

Users can create a service by entering the required Load Balancer information and selecting detailed options through the Samsung Cloud Platform Console.

Create Load Balancer

You can create and use a Load Balancer service from the Samsung Cloud Platform Console.

To create a Load Balancer, follow these steps.

Click the All Services > Networking > Load Balancer menu. You will be taken to the Load Balancer’s Service Home page.
On the Service Home page, click the Create Load Balancer button. You will be taken to the Create Load Balancer page.
On the Load Balancer Creation page, enter the information required to create the service and select detailed options.
- In the Service Information Input area, enter or select the required information.

Category	Required status	Detailed description
Load Balancer name	Required	Load Balancer resource name English uppercase and lowercase letters, numbers, and special characters(`-_`) must be entered with 3 to 63 characters
Service Category	Required	Load Balancer service type L4 or L7 select
VPC name	Required	VPC where the Load Balancer will be created Select from the VPC list + New selectable after creation
Service Subnet name	Required	VPC Subnet where the Load Balancer will be created Select from the list of Subnets created in the selected VPC + New If selected, it can be chosen after creation
Service IP	Select	Load Balancer’s service IP Enter one IP from the Service Subnet range in IP address format If not entered, it will be automatically assigned from the IP allocation range of the selected Subnet
Public NAT IP	Select	Select the Public NAT IP to use in the Load Balancer when allowing service access from external (Internet) sources If a VPC and Service Subnet are selected, or if the selected VPC is connected to an Internet Gateway, use can be set Select from the list of Public IPs created in the selected VPC + New Creation can be selected after it is created
Source NAT IP	Selection	IP used for member communication in the Load Balancer Enter one IP from the Service Subnet range in IP address format If not entered, an IP will be automatically assigned from the selected Subnet’s IP allocation range If a Load Balancer already exists in the selected Subnet, display the previously assigned IP information IP cannot be modified after the Load Balancer is created
Health check IP	Selection	IP to be used for health checks in the Load Balancer Enter two IPs from the Service Subnet range in IP address format, each separately If not entered, IPs will be automatically assigned from the selected Subnet’s IP allocation range (if only one IP is entered, the remaining IP will be automatically assigned) If a Load Balancer already exists in the selected Subnet, display the previously assigned IP information IP cannot be modified after the Load Balancer is created
Use firewall	Select	Set whether to use the firewall Select whether to enable the firewall for Load Balancer access control Use When selected, create firewall resources If not checked, create firewall resources in an unused state If a firewall is already in use in the selected subnet, display firewall resource information
Firewall log storage	Select	Select whether to store Firewall logs Enabled when set, store Firewall logs in the bucket configured in the log storage For more details, see Using Firewall Log Storage reference

Table. Load Balancer Service Information Input Items

In the Additional Information Input area, enter or select the required information.
Category
Required status
Detailed description
description Select Enter resource description
tag Select Add tags
Up to 50 tags can be added per resource
Table. Load Balancer additional information input fields

Category	Required status	Detailed description
description	Select	Enter resource description
tag	Select	Add tags Up to 50 tags can be added per resource

Check the created service information and the estimated billing amount, then click the Create button.

After creation is complete, check the created resources on the Load Balancer List page.

guide

Load Balancer service does not provide access control for Service IP and service ports.
- When creating a Load Balancer, select Use Firewall to manage communication between the client and the Load Balancer, and between the Load Balancer and members with Firewall rules, and we recommend using Save Firewall Logs to store access logs.
When creating a service and enabling the Firewall log storage feature, you must configure the log storage first. If the log storage is not configured, you cannot create a Load Balancer service.

Caution

When using a firewall, you must add rules required for Load Balancer communication. Register the rules, paying attention to the direction for each purpose.

If you do not add a rule, the Load Balancer service will not operate correctly.

Purpose	Source IP	Destination IP	Protocol	Destination Port/Type	direction
Client → LB connection	Client IP	LB Service IP	Listener protocol	Listener service port	Outbound
LB → Member connection	LB Source NAT IP	LB server group member IP	LB server group protocol	Member port	Inbound
LB → Member health check	LB health check IP	LB server group member IP	Health check protocol	Health check port When the health check port and member port differ, register the member port	Inbound

Figures and tables. Add Load Balancer firewall rule

Check Load Balancer detailed information

The Load Balancer service can be viewed and edited for the resource list and detailed information in the Load Balancer menu. The Load Balancer Details page consists of Details, Connected Resources, Tags, Activity Log tabs.

Follow these steps to view detailed information about the Load Balancer service.

Click the All Services > Networking > Load Balancer menu. You will be taken to the Load Balancer’s Service Home page.
From the Service Home page, click the Load Balancer menu. You will be taken to the Load Balancer list page.

Load Balancer List page, click the resource to view its details. You will be taken to the Load Balancer Details page.

Load Balancer Details page displays status information and additional feature information, and consists of Details, Connected Resources, Tags, Activity History tabs.

Category	Detailed description
status	Load Balancer resource status Active: Service is operating normally Deleting: Service termination request is being processed Creating: Service creation request is being processed Error: Unable to determine current status due to internal error Editing: Service modification request is being processed
Service termination	Delete Load Balancer resource

Category

Detailed description

status

Load Balancer resource status

Active: Service is operating normally

Deleting: Service termination request is being processed

Creating: Service creation request is being processed

Error: Unable to determine current status due to internal error

Editing: Service modification request is being processed

Service termination

Delete Load Balancer resource

Table. Load Balancer status information and additional feature items

Detailed Information

In the Detailed Information tab, you can view the detailed information of the resource selected from the Load Balancer list and edit the necessary information.

Category	Detailed description
Service	service name
Resource Type	Resource Type
SRN	Unique resource ID in Samsung Cloud Platform
Resource Name	Resource Name
Resource ID	Unique resource ID in the service
Creation date	Service creation date and time
Modification date and time	Service modification date and time
constructor	Service creation request user
Editor	User requesting service modification
Load Balancer name	Load Balancer name
Service IP	Load Balancer’s Service IP (used for communication between client and Load Balancer) Use one IP from the Service Subnet
Service Category	Load Balancer service type
Source NAT IP	Load Balancer’s Source NAT IP (used for communication between Load Balancer and servers) Use one IP from the Service Subnet
VPC name	VPC resource name where the Load Balancer is created Clicking the resource name navigates to the detail page
Service Subnet name	Subnet resource name where the Load Balancer was created Click the resource name to go to the detail page
Public NAT IP	Load Balancer’s Public NAT IP (used when configuring internet service) Edit icon can be clicked to modify the settings
Private NAT IP	Load Balancer’s Private NAT IP Edit click the icon to modify the settings
Health check IP	Load Balancer Health Check IP (used when performing health checks on LB server group members) Use two IPs in the Service Subnet
Explanation	Additional information or description about Load Balancer Edit icon can be clicked to modify
Firewall name	Firewall resource name connected to Load Balancer Click the resource name to navigate to the detail page

Table. Load Balancer detailed information tab items

Connected resources

Connected Resources tab lets you view the list of Listeners attached to the Load Balancer, and you can create or delete Listeners.

In the Connected Resources tab, selecting the Listener item takes you to the Listener Details page where you can view, edit, and delete the detailed information.
On the Listener Details page, clicking the Edit icon lets you modify the information.

Category	Detailed description
Create Listener	Create Listener button
Listener name	Listener resource name
Routing rules	Routing rules attached to the Listener Routing Action: Traffic routing method Configuration value: Configuration value for the routing action
Protocol	Protocol that the Listener receives
Port	Port that the Listener receives
Creation Date/Time	Listener creation time
Delete	Delete Listener button

Table. List of resources connected to Load Balancer

Category	Detailed description
Tag list	Tag list You can view the Key, Value information of the tag Up to 50 tags can be added per resource When entering a tag, you can search and select from the list of previously created Keys and Values

Job History

Work History tab allows you to view the work history of the selected resource.

Category	Detailed description
Work log	Task execution details
Work Date/Time	Task execution date and time
Resource Type	Resource Type
Resource name	Load Balancer name
Operation result	Task execution result (success/failure)
Operator Information	User information of the performed operation

Table. Load Balancer operation history list entries

Load Balancer Resource Management

You can manage resources such as creating and deleting Load Balancer listeners.

Create Listener

Create a Listener on the Load Balancer to receive client requests and handle traffic according to the Listener configuration.

information

The protocol that receives client requests varies depending on the Load Balancer service type.

L4 Load Balancer case: TLS, TCP, UDP protocols
When using an L7 Load Balancer: HTTP, HTTPS protocols

Creating a Listener in L4 Load Balancer

To create a Listener in the L4 Load Balancer, follow these steps.

Click the All Services > Networking > Load Balancer menu. You will be taken to the Load Balancer’s Service Home page.
On the Service Home page, click the Load Balancer menu. You will be taken to the Load Balancer list page.
Load Balancer List page, click the Load Balancer resource to create a Listener. You will be taken to the Load Balancer Details page.
On the Load Balancer Details page, click the Connected Resources tab. You will be taken to the Connected Resources tab page.
On the Connected Resources tab page, click the Create Listener button in the upper right.
Enter or select the required information in the Service Information Input area.
- The information that can be entered varies depending on the protocol.

Category	Required	Detailed description
Load Balancer	Required	Name of the Load Balancer resource where the Listener will be created
Listener name	Required	Listener resource name
Protocol	Required	Select Listener receive protocol TCP, UDP, TLS, TCP_Proxy
service port	Required	Enter Listener receiving port Enter a value between 1 and 65,534
Routing rules	Required	Routing rule configuration Routing Action: L4 Load Balancer is fixed to LB Server Group Forwarding LB Server Group: Select the LB server group that will handle client requests Can select from LB server groups created in the same Service Subnet as the Load Balancer LB server groups currently used by other Load Balancers cannot be selected For more information, see Create LB Server Group reference
Session retention time	Required	Client session keep-alive time setting Default: 120 seconds TCP, TLS protocols allow input in 60‑second increments between 60 and 3,600 seconds UDP protocol allows input in 60‑second increments between 60 and 180 seconds
Proxy Protocol	Select	Set whether to add client IP information to the proxy protocol header (when using TCP protocol) Insert the client IP address into the TCP proxy protocol header and forward it to the server (supports proxy protocol v1)
Persistence	Required	Select Sticky Session method (set when using TCP, TLS protocols) Source IP: Fix the connection server based on the client IP address
SSL certificate	Select	Select default encryption certificate and security level (when using the TLS protocol) Select the certificate to use for the client SSL/TLS Handshake Default certificate (required): Choose the certificate used for client connections SSL security level (required): Select the security level when encrypting client connections (SSL security level support items reference) High: Supports Cipher Suites of TLS 1.3 version Medium: Supports Cipher Suites including TLS 1.2 version Low (not recommended): Supports Cipher Suites including TLS 1.1 version
Server SSL security level	Required	Select security level when configuring End-to-End SSL (TLS protocol settings) Select Do not use when you do not encrypt the server connection

Table. Enter Listener service information – when using L4 Load Balancer

In the Additional Information Input area, enter or select the required information.

Category	Required	Detailed description
Explanation	Select	Enter resource description
tag	Select	Add tags Up to 50 tags can be added per resource

Table. Listener additional information input fields

Verify the created service information and click the Create button.
- When creation is complete, verify the created resource on the Load Balancer Details page’s Connected Resources tab.

Creating a Listener in L7 Load Balancer

Follow these steps to create a Listener in an L7 Load Balancer.

Click the All Services > Networking > Load Balancer menu. Go to the Load Balancer’s Service Home page.
On the Service Home page, click the Load Balancer menu. You will be taken to the Load Balancer list page.
On the Load Balancer List page, click the Load Balancer resource for which you want to create a Listener. You will be taken to the Load Balancer Details page.
Click the Connected Resources tab on the Load Balancer Details page. You will be taken to the Connected Resources tab page.
On the Connected Resources tab page, click the Create Listener button in the upper right.
In the Service Information Input area, enter or select the required information.
- The information that can be entered varies depending on the protocol.

Category	Required status	Detailed description
Load Balancer	Required	Load Balancer resource name where the Listener is created
Listener name	Required	Listener resource name
Protocol	Required	Select Listener reception protocol Select HTTP or HTTPS
service port	Required	Listener receive port input Enter a value between 1 and 65,534
Routing Rules > Routing Action	Required	Select routing processing method LB server group forwarding: Forward traffic to the LB server group URL redirection: Redirection response from the Load Balancer
Routing Rules > Routing Conditions	Required	When the routing action is LB server group forwarding, set the LB server group per routing condition URL Path: Set the LB server group per URL path Host Header: Set the LB server group based on the Host value Redirect Target: When the routing action is URL redirection, configure the redirect response Redirect URL Path: Enter the URL path to redirect to Redirect Host: Enter the Host value to redirect to Protocol/Port: Set the protocol and port for the redirect (HTTP protocol usage required) For detailed information on adding routing rules, see Edit Routing Rules reference
Persistence	Selection	Select Sticky Session mode (set when the routing action is LB server group forwarding) Source IP: Fix the connection server based on the client IP address Cookie: Fix the connection server based on the cookie initially inserted by the Load Balancer
Listener timeout setting > Session keep-alive time	Select	HTTP connection keep-alive time setting Enabled when you can input a value between 60 and 3,600 seconds Enabled → Disabled: Since it cannot be modified, it is recommended to use it only for services that require it
Listener timeout setting > HTTP connection timeout	Select	Set HTTP response timeout Client connection keep-alive time, server response wait time, and response timeout can be entered between 1 and 120 seconds when use is selected Use → Not use: Since it cannot be modified, it is recommended to apply it selectively to necessary services
X-Forwarded-For	Select	Set whether to insert client IP information When enabled, add the client IP address to the X-Forwarded-For header
X-Forwarded-Proto	Select	Set whether to insert client request protocol information When used, add the client request protocol to the X-Forwarded-Proto header
X-Forwarded-Port	Select	Set whether to insert client request port information When enabled, add the client request port to the X-Forwarded-Port header
HTTP 2.0	Select	Set whether to use HTTP/2 for client‑server connections
SSL certificate	Select	Select encryption certificate and security level (HTTPS protocol usage) Select the certificate to use for the client SSL/TLS Handshake Default certificate (required): Choose the certificate to use for client connections SSL security level (required): Select the security level when encrypting client connections (see SSL security level support items for reference) High: Supports Cipher Suites of TLS 1.3 version Medium: Supports Cipher Suites including TLS 1.2 version Low (not recommended): Supports Cipher Suites including TLS 1.1 version For multi-domain services, after creating the Listener, add the certificate to the SNI certificate.
Server SSL security level	Required	Select security level when configuring End-to-End SSL (HTTPSS protocol setting) If you do not encrypt the server connection, select Do not use

Table. Enter Listener service information - when using L7 Load Balancer

Reference

The routing rule’s URL path matching method is Starts with(prefix match).

It checks whether the entered URL path starts with a specific string, and if the beginning matches, the routing rule is applied.
Example: when the entered URL is /api/
- Matching URL: /api/users, /api/v1/login, /api/images/logo.png
- Unmatched URL: /auth/api/, /API/users

In the Additional Information Input area, enter or select the required information.

Category	Required status	Detailed description
Explanation	Select	Enter resource description
tag	Select	Add tags Up to 50 tags can be added per resource

Table. Listener additional information input fields

Verify the created service information and click the Create button.
- When creation is complete, verify the created resource on the Load Balancer Details page’s Connected Resources tab.

SSL security level support items

The list of TLS versions and Cipher Suites supported by the Listener for each SSL security level is as follows.

Security level	TLS version	Cipher Suite (encryption algorithm)
High	TLS 1.3	TLS13_AES_128_GCM_SHA256 TLS13_AES_256_GCM_SHA384 TLS13_CHACHA20_POLY1305_SHA256
Normal/Low	Normal: TLS 1.3, 1.2 Low: TLS 1.3, 1.2, 1.1	TLS13_AES_128_GCM_SHA256 TLS13_AES_256_GCM_SHA384 TLS13_CHACHA20_POLY1305_SHA256 RC4-MD5 RC4-SHA DES-CBC3-SHA DHE-RSA-AES128-GCM-SHA256 DHE-RSA-AES256-GCM-SHA384 DHE-RSA-CHACHA20-PLY1305 ECDHE-RSA-AES128-SHA ECDHE-RSA-AES256-SHA ECDHE-RSA-AES128-SHA256 ECDHE-RSA-AES256-SHA384 ECDHE-RSA-CHACHA20-POLY135 ECDHE-ECDSA-AES128-SHA ECDHE-ECDSA-AES256-SHA ECDHE-ECDSA-AES128-SHA256 ECDHE-ECDSA-AES256-SHA384 ECDHE-ECDSA-AES128-GCM-SHA256 ECDHE-ECDSA-AES256-GCM-SHA384 ECDHE-ECDSA-CHACHA20-POLY1305

Table. Supported items by SSL security level

Check Listener detailed information

On the Connected Resources tab of the Load Balancer Details page, you can select a Listener to view and edit its detailed information.

To view the Listener’s detailed information, follow these steps.

Click the All Services > Networking > Load Balancer menu. Navigate to the Load Balancer’s Service Home page.
On the Service Home page, click the Load Balancer menu. You will be taken to the Load Balancer List page.
On the Load Balancer List page, click the resource whose details you want to view. You will be taken to the Load Balancer Details page.
On the Load Balancer Details page, click the Connected Resources tab.
Click the Listener to view detailed information from the list of connected resources. It navigates to the Listener Details page.
- Listener Details page displays status information and additional feature information, and consists of Details, Tags, Activity Log tabs.

Category	Detailed description
status	Listener status Active: The service is properly activated Deleting: Processing service termination request Creating: Processing service creation request Error: Cannot determine current status due to an internal error Editing: Processing service modification request
Delete Listener	Delete Listener

Category

Detailed description

status

Listener status

Active: The service is properly activated

Deleting: Processing service termination request

Creating: Processing service creation request

Error: Cannot determine current status due to an internal error

Editing: Processing service modification request

Delete Listener

Table. Listener status information and additional feature items

Detailed Information

Detailed Information tab allows you to view the Listener’s detailed information and edit the necessary details. Detailed information varies depending on the Load Balancer in use.

L4 Load Balancer Detailed Information

Category	Detailed description
Service	Service name
Resource Type	Resource Type
SRN	Unique resource ID in Samsung Cloud Platform
Resource Name	Resource Name
Resource ID	Unique resource ID in the service
constructor	User requesting listener creation
Creation Date/Time	Listener creation time
Editor	User requesting listener modification
Modification date	Listener modification timestamp
Listener name	Listener name
Protocol	Listener usage protocol
Port	Listener port
Session retention time	Client session retention time Edit icon can be clicked to edit
Proxy Protocol	Whether to insert client IP information Click the Edit icon to edit
Persistence	Use of sticky session Click the Edit icon to modify
Routing rules	Routing action and LB server group information Edit icon can be clicked to modify LB server group
SSL certificate	Default certificate and SSL security level, expiration date and time information Edit icon can be clicked to modify If a registered SNI certificate exists, the default certificate cannot be edited (it can be edited after deleting the SNI certificate)
SNI certificate	SNI Certificate Details Edit Click the icon to add SNI information and certificate for reference
Server SSL security level	Whether server connection is encrypted You can edit by clicking the Edit icon
Explanation	Additional information about the Listener Click the Edit icon to modify

Table. Listener Details Tab – When Using L4 Load Balancer

L7 Load Balancer Detailed Information

Category	Detailed description
Service	Service name
Resource Type	Resource Type
SRN	Unique resource ID in Samsung Cloud Platform
Resource Name	Resource Name
Resource ID	Unique resource ID in the service
constructor	User requesting listener creation
Creation Date/Time	Listener creation time
Editor	User requesting listener modification
Modification date	Listener modification timestamp
Listener name	Listener name
Protocol	Listener usage protocol
Port	Listener port
Session retention time	HTTP connection keep-alive time Edit Click the icon to change from disabled to enabled and modify the input value
Client connection keep-alive time	HTTP client connection keep-alive timeout Edit icon click to change from unused → used and modify input value
Server response latency	HTTP server response wait timeout Edit icon can be clicked to change from unused → used and modify the input value
X-Forwarded-For	Whether to insert client IP information Edit icon can be clicked to modify
X-Forwarded-Proto	Whether to insert client request protocol information Click the Edit icon to edit
X-Forwarded-Port	Whether to insert client request port information Edit icon can be clicked to edit
Persistence	Use of sticky session Edit icon can be clicked to modify
HTTP 2.0	Whether to use HTTP/2 for client-server connections Edit icon can be clicked to modify
Routing rules	Routing action and routing condition/redirect target information Click the Edit icon to modify routing condition or redirect target.
SSL certificate	Default certificate and SSL security level, expiration date and time information Edit icon can be clicked to modify If a registered SNI certificate exists, the default certificate cannot be edited (it can be edited after deleting the SNI certificate)
SNI certificate	SNI Certificate Details Edit Click the icon to add SNI information and certificate for reference
Server SSL security level	Whether server connection is encrypted Edit icon can be clicked to modify
Explanation	Additional information about the Listener Edit icon can be clicked to edit

Table. Listener Details Tab - When using L7 Load Balancer

Category	Detailed description
Tag list	Tag list You can view the Key, Value information of the tag Up to 50 tags can be added per resource When entering a tag, you can search and select from the list of previously created Keys and Values

Job History

You can view the Listener’s operation history.

Category	Detailed description
Work log	Task execution details
Operation Date/Time	Task execution date and time
Resource Type	Resource Type
Resource Name	Listener name
Operation result	Task execution result (success/failure)
Operator Information	Information about the user who performed the task

Table. Listener operation history tab items

Modify routing rules

On the Connected Resources tab of the Load Balancer Details page, you can modify the Listener’s routing rules.

To modify the Listener’s routing rules, follow these steps.

Click the All Services > Networking > Load Balancer menu. Navigate to the Load Balancer’s Service Home page.
From the Service Home page, click the Load Balancer menu. You will be taken to the Load Balancer list page.
On the Load Balancer List page, click the resource you want to view details for. You will be taken to the Load Balancer Details page.
On the Load Balancer Details page, click the Connected Resources tab.
Click the Listener to add a lighting condition from the list of connected resources. You will be taken to the Listener Details page.
On the Listener Details page, click the Edit icon of the Routing Rules item. The Edit Routing Rules popup window opens.

After modifying the routing rule according to the routing action, click the Confirm button.

Category	Required status	Detailed description
Routing Action	-	Current routing method (cannot be modified)
Routing condition	Required	If the routing action is LB server group forwarding, routing conditions can be modified URL path: Modify request URL path and LB server group (up to 20 additions possible) Host header: Modify request host and LB server group (up to 20 additions possible)
Redirect target	Required	When the routing action is URL redirection, the redirect target can be modified Path: the URL path can be changed Host: the host can be changed Protocol/Port: cannot be modified (only HTTP → HTTPS redirection is allowed)

Category

Required status

Detailed description

Routing Action

Current routing method (cannot be modified)

Routing condition

Required

If the routing action is LB server group forwarding, routing conditions can be modified

URL path: Modify request URL path and LB server group (up to 20 additions possible)

Host header: Modify request host and LB server group (up to 20 additions possible)

Redirect target

Required

When the routing action is URL redirection, the redirect target can be modified

Path: the URL path can be changed

Host: the host can be changed

Protocol/Port: cannot be modified (only HTTP → HTTPS redirection is allowed)

Table. Listener routing rule modification items

Delete Listener

To delete an unused Listener, follow these steps.

Click the All Services > Networking > Load Balancer menu to go to the Load Balancer’s Service Home page.
Click the Load Balancer menu on the Service Home page. You will be taken to the Load Balancer List page.
Load Balancer List page, click the Load Balancer resource whose Listener you want to delete. You will be taken to the Load Balancer Details page.
On the Load Balancer Details page, click the Connected Resources tab. You will be taken to the Connected Resources tab page.
On the Connected Resources tab page, click the Listener you want to delete. Navigate to the Listener Details page.
On the Listener Details page, click the Delete Listener button.

Terminate Load Balancer

You can reduce costs by terminating unused Load Balancers. However, since this may affect application services, request termination only after thorough prior review.

Caution

In the following cases, the Load Balancer cannot be terminated.

If there is a Listener attached to the Load Balancer: Delete the attached Listener on the Load Balancer Details page’s Connected Resources tab.
If you are using a Public NAT IP on the Load Balancer: Load Balancer Details page’s Details tab, deselect the Public NAT IP that is in use.
If you are using a Private NAT IP on the Load Balancer: Load Balancer Details page’s Details tab, deselect the Private NAT IP in use.
If there are rules registered in the Firewall: delete the Firewall rules in use from the Load Balancer Details page’s Detailed Information tab.
If connected to a PrivateLink Service: Check the connected Load Balancer on the PrivateLink Service Details page.

To cancel the Load Balancer, follow these steps.

Click the All Services > Networking > Load Balancer menu. You will be taken to the Load Balancer’s Service Home page.
On the Service Home page, click the Load Balancer menu. You will be taken to the Load Balancer List page.
Load Balancer List page, click the resource to terminate. You will be taken to the Load Balancer Details page.
On the Load Balancer Details page, click the Terminate Service button.
After termination is complete, check the resource termination status in the Load Balancer list.

1 - LB Server Groups

Users can create an LB server group through the Samsung Cloud Platform Console and connect it to a Load Balancer’s listener.

Create LB server group

Reference

You can create up to 1,000 LB server groups per account.

To create an LB server group, follow these steps.

Click the All Services > Networking > Load Balancer menu to go to the Load Balancer’s Service Home page.
On the Service Home page, click the LB Server Group menu. You will be taken to the LB Server Group List page.
On the LB Server Group List page, click the Create LB Server Group button. You will be taken to the Create LB Server Group page.

On the Create LB Server Group page, enter the information required to create a service and select detailed options.

Enter or select the required information in the Service Information Input area.

Category	Required status	Detailed description
LB server group name	Required	LB server group resource name Enter using English letters, numbers, and special characters (`-_`) with a length of 3 to 63 characters LB server group name must be unique within the Account
VPC name	Required	Select the VPC to create the LB server group Select the VPC where the Load Balancer that will connect to the LB server group is created
Service Subnet name	Required	Select the VPC Subnet to create the LB server group Select the Subnet where the Load Balancer that will connect to the LB server group is created
Load balancing	Required	Load Balancing Algorithm Selection Round Robin: Distribute sequentially among registered members Weighted round robin: Distribute sequentially in proportion to the weight assigned to each member Least Connection: Distribute to the member with the fewest connections Weighted least connection: Distribute to the higher‑priority member considering each member’s weight and connection count IP Hash: Distribute to a specific member based on the hash value of the client IP address
Protocol	Required	Select the receiving protocol for the LB server group Select the protocol to forward to members of the LB server group
LB health check	Required	Select LB health check Select an LB health check that was created in the same Service Subnet as the LB server group

Table. LB server group service information input fields

Enter or select the required information in the Additional Information Input area.
Category
Required status
Detailed description
Explanation Select Enter resource description
tag Select Add tags
Up to 50 tags can be added per resource
Table. LB server group additional information input fields

Check the created service information and the estimated billing amount, and click the Create button.
- When creation is complete, verify the created resources on the LB server group list page.

Check detailed information of LB server group

In the LB Server Group menu, you can view and edit the resource list and detailed information. The LB Server Group Details page consists of Details, Connected Resources, Tags, Operation History tabs.

To view detailed information about the LB server group, follow these steps.

Click the All Services > Networking > Load Balancer menu. You will be taken to the Load Balancer’s Service Home page.

On the Service Home page, click the LB server group menu. You will be taken to the LB server group list page.

You can modify column visibility by clicking the Settings button at the top right of the table.

Category	Display option	Detailed description
LB server group name	Basic	LB server group resource name
Protocol	Basic	LB server group protocol
Load Balancer name	Basic	Load Balancer resource name linked to the LB server group
LB Health Check ID	Basic	LB server group’s LB health check resource name
Number of members	Basic	Number of members registered in the LB server group
Creation date and time	Basic	LB server group creation time
status	Basic	LB server group resource status

Table. LB server group list items

On the LB server group list page, click the resource to view detailed information. It navigates to the LB server group details page.

LB Server Group Details At the top of the page, status information and descriptions of additional features are displayed.

Category	Detailed description
status	LB server group resource status Active: The service is active and functioning normally Deleting: Processing service termination request Creating: Processing service creation request Error: Cannot determine current status due to an internal error If this status persists, please contact through the Support Center Editing: Processing service modification request
Delete LB server group	Delete LB server group resource

Category

Detailed description

status

LB server group resource status

Active: The service is active and functioning normally

Deleting: Processing service termination request

Creating: Processing service creation request

Error: Cannot determine current status due to an internal error
- If this status persists, please contact through the Support Center

Editing: Processing service modification request

Delete LB server group

Delete LB server group resource

Table. LB server group status information and additional feature items

Detailed Information

In the Detailed Information tab, you can view the detailed information of a resource from the LB server group list, and edit it if necessary.

Category	Detailed description
service	Service name
Resource Type	Resource Type
SRN	Unique resource ID in Samsung Cloud Platform
Resource name	Resource name
Resource ID	Unique resource ID in the service
Constructor	User requesting service creation
Creation date	Service creation date and time
Editor	User requesting service modification
Modification date and time	Service modification date and time
Load Balancer name	Load Balancer resource name connected to the LB server group When the resource name is clicked, go to the detail page
LB server group name	LB server group name
VPC name	VPC resource name where the LB server group was created Click the resource name to go to the detail page
Service Subnet name	Subnet resource name where the LB server group is created Click the resource name to go to the detail page
Port	LB server group forwarding port
Protocol	LB server group forwarding protocol
Load balancing	LB server group traffic distribution method Edit icon can be clicked to edit
LB health check	LB health check resource name Click the Edit icon to edit
description	LB server group addition description Edit Click the icon to edit

Table. LB server group detailed information tab items

Connected resources

Connected Resources tab allows you to view the list of members connected to the LB server group, and you can add or delete members.

Category	Detailed description
Add member	Add LB Server Group Member button
Member name	Member name (server name) added to the LB server group
IP address	Member IP address
Port	Member receive port
weight	Load balancing weight Default 1 In an LB server group, when using weighted load balancing (Weighted Round Robin, Weighted Least Connection), values from 1 to 1000 can be entered
Activation	Member activation status Enable: Receiving client requests Disable: Excluded from receiving client requests
Creation date and time	Member addition date/time
Health check status	Health check status information Healthy: Health check is normal Unhealthy: Health check is abnormal Unknown: Health check status cannot be determined
status	Member resource status

Table. List of resources connected to the LB server group

Category	Detailed description
Tag list	Tag list You can view the Key and Value information of the tag Up to 50 tags can be added per resource When entering a tag, you can search and select from the list of previously created Keys and Values

Job History

Work History tab allows you to view the operation history of the selected resource.

Category	Detailed description
Work history	Task execution details
Operation date and time	Task execution date and time
Resource Type	Resource Type
Resource Name	LB server group name
Operation result	Task execution result (success/failure)
Operator Information	User information of the performed operation

Table. LB server group operation history list items

Managing LB Server Group Resources

You can view the member list of an LB server group and add or remove members.

Add member

You can add members to the LB server group to register server resources that will handle client requests.

To add a member to the LB server group, follow these steps.

Click the All Services > Networking > Load Balancer menu to go to the Load Balancer’s Service Home page.
On the Service Home page, click the LB Server Group menu. You will be taken to the LB Server Group List page.
On the LB Server Group List page, click the resource you want to edit detailed information for. You will be taken to the LB Server Group Detail page.
On the LB Server Group Details page, click the Connected Resources tab. You will be taken to the Connected Resources tab page.
On the Connected Resources tab page, click the Add Member button in the upper right.

Add Member After entering the required information in the popup window, click the Confirm button.

Category	Required status	Detailed description
LB server group name	basic	LB server group name for adding a member
target server	Required	Server information to add as a member Virtual Server/Bare Metal Server: Select from the list of servers created in the same VPC as the LB server group Enter IP Directly: Enter server IP directly Click the Add button to add the target server
Member information	Required	Member Port and Weight Settings Member Name: Display the server name and IP to be added as a member Port: The port the member will receive Weight: The weight applied to load balancing When using Weighted Round Robin or Weighted Least Connection load balancing, a value between 1 ~ 1000 is required

Category

Required status

Detailed description

LB server group name

basic

LB server group name for adding a member

target server

Required

Server information to add as a member

Virtual Server/Bare Metal Server: Select from the list of servers created in the same VPC as the LB server group

Enter IP Directly: Enter server IP directly

Click the Add button to add the target server

Member information

Required

Member Port and Weight Settings

Member Name: Display the server name and IP to be added as a member

Port: The port the member will receive

Weight: The weight applied to load balancing
- When using Weighted Round Robin or Weighted Least Connection load balancing, a value between 1 ~ 1000 is required

Table. LB server group member addition item

Click the OK button in the alert dialog.
Check if members have been added in the Connected Resources tab.

guide

Add the following rule to the Security Group of the server added as a member to allow communication between the Load Balancer and the LB server group members.

(Direction) Inbound rule, (Target address) Load Balancer’s Source NAT IP, (Protocol) LB server group protocol, (Allowed port) member port

Reference

If the LB server group is in Creating, Editing, Deleting, Error state, you cannot add members.
If the number of members that can be created in the Account to which the LB server group belongs is exceeded, you cannot add members. The maximum number of members that can be created in a single Account is 1,000.

Reference

Through VPC Peering, you can add a server created in another VPC as a member. After adding the target server by Enter IP Directly, check the Health Check Status of the added member in the Connected Resources tab.
For detailed information, refer to VPC > VPC Peering.

Member Edit

When you click a member name in the member list, you are taken to the Member Details page. You can view the member details, and you can click the Edit icon to change the information.

To edit member details, follow these steps.

Click the All Services > Networking > Load Balancer menu to go to the Load Balancer’s Service Home page.
On the Service Home page, click the LB Server Group menu. You will be taken to the LB Server Group List page.
On the LB Server Group List page, click the resource you want to edit details for. You will be taken to the LB Server Group Details page.
On the LB Server Group Details page, click the Connected Resources tab. You will be taken to the Connected Resources tab page.
Linked Resources tab page, click the member you want to edit. You will be taken to the Member Details page.
Edit the desired member information on the Member Details page.

Weight modification

It can be modified when using weighted load balancing (Weighted Round Robin, Weighted Least Connection).

Click the Edit icon of the Weight item. In the edit window, enter the weight to edit and click the Confirm button.

Port modification

To edit a member port, click the Edit icon in the Port field. In the edit window, enter the port to edit and click the Confirm button.

Activate edit

To modify member activation, click the Edit icon of the Activation item. In the edit window, set the activation status and click the Confirm button.

Reference

If you change the activation to Disable, the member will only handle existing connections and will stop new connections.

Delete member

To delete unused members, follow these steps.

Click the All Services > Networking > Load Balancer menu. You will be taken to the Load Balancer’s Service Home page.
On the Service Home page, click the LB Server Group menu. You will be taken to the LB Server Group List page.
On the LB Server Group List page, click the resource whose details you want to edit. You will be taken to the LB Server Group Details page.
On the LB Server Group Details page, click the Connected Resources tab. You will be taken to the Connected Resources tab page.
Linked Resources tab page, click the member you want to delete. You will be taken to the Member Details page.
On the Member Details page, click the Delete Member button.
Check whether the member has been deleted in the Connected Resources tab.

Terminate LB server group

You can terminate an unused LB server group. However, because it may affect the application service, please request termination only after thorough prior review.

guide

The LB server group cannot be terminated in the following cases.

If the LB server group is being used in a Listener: modify the Listener’s LB server group before deleting the LB server group.
If there are members registered in the LB server group: Delete all resources attached to the LB server group before terminating the LB server group.
When using an LB server group in an Auto Scaling Group: configure the load balancer so it is not used by the Auto Scaling Group, or adjust it so that the LB server group is not utilized. For more details, see Auto-Scaling Group > Load Balancer Usage.

To terminate the LB server group, follow these steps.

Click the All Services > Networking > Load Balancer menu. You will be taken to the Load Balancer’s Service Home page.
On the Service Home page, click the LB Server Group menu. You will be taken to the LB Server Group List page.
From the LB server group list, click the resource to be terminated. You will be taken to the LB server group detail page.
On the LB server group detail page, click the LB server group delete button.
Once the termination is complete, check the resource termination status in the LB server group list.

2 - LB Health Check

Users can create LB health checks through the Samsung Cloud Platform Console and use them for LB server groups.

Create LB health check

Reference

You can create up to 500 LB health checks per account.

To create an LB health check, follow these steps.

Click the All Services > Networking > Load Balancer menu. You will be taken to the Load Balancer’s Service Home page.
On the Service Home page, click the LB Health Check menu. You will be taken to the LB Health Check List page.
On the LB Health Check List page, click the Create LB Health Check button. You will be directed to the Create LB Health Check page.

On the LB Health Check Creation page, enter the information required to create the service and select detailed options.

In the Service Information Input area, enter or select the required information.

Category	Required	Detailed description
LB health check name	Required	LB health check resource name Enter using English uppercase and lowercase letters, numbers, and special characters (`-_`) with a length of 3 to 63 characters LB health check name must be unique within the Account
VPC name	Required	Select the VPC to create the LB health check Select the VPC where the LB server group that will use the LB health check is created
Service Subnet name	Required	Select the VPC Subnet to create the LB health check Select the Subnet where the LB server group that will use the LB health check is created
Health check method > Protocol	Required	Health Check Protocol Select the protocol to use for member health checks among TCP, HTTP
Health check method > Health check port	Required	Health check port Enter a value between 1 and 65,534 to use as the member health check port
Health check method > interval	Required	Health check interval Default is 5 seconds, input allowed between 1 and 180 seconds
Health check method > waiting time	Required	Health check response wait time Default 5 seconds, can be set between 1 and 180 seconds Cannot be set to a value larger than the interval
Health check method > detection count	Required	Number of times to evaluate health check status Default value 3 times, input allowed between 1 and 10
Health check method > HTTP method	Required	Set HTTP request method (HTTP protocol usage setting) Select GET or POST
Health check method > URL monitor	Required	Enter health check URL path (set when using HTTP protocol) Enter using English letters, numbers, and special characters (`/.-_?&=`) within 50 characters
Health check method > Response code	Required	Enter the HTTP response codes to receive from the server (HTTP protocol when used) Enter response codes in the 200 ~ 500 range
Health check method > request string	Required	Health check request string input (HTTP protocol POST method setting) Enter the content to include in the Request Body using English letters, numbers, and special characters (`/.-_?&=`) within 255 bytes

Table. LB health check service information input items

In the Additional Information Input area, enter or select the required information.
Category
Required status
Detailed description
description Select Enter resource description
tag Select Add tags
Up to 50 tags can be added per resource
Table. LB server group additional information input fields

Summary Check the service information and estimated charges created in the panel, and click the Create button.
- When creation is complete, check the created resources on the LB Health Check List page.

Category	Required status	Detailed description
description	Select	Enter resource description
tag	Select	Add tags Up to 50 tags can be added per resource

guide

Add the following rule to the Security Group of the server added as a member for member health checks in the Load Balancer.

(Direction) Inbound rule, (Target address) Load Balancer’s health check IP, (Protocol) health check protocol, (Allowed port) health check port
It is recommended to set the health check port the same as the member port.
If the health check port and the member port differ, the health check is performed using the member port.

guide

Configure the LB health check to a value that members added to the LB server group can respond to.

Since the Load Balancer determines member status based on health check responses, the LB health check results may differ from the actual service status.

View detailed LB health check information

In the LB Health Check menu, you can view and edit the resource list and detailed information. The LB Health Check Details page consists of Details, Connected Resources, Tags, Activity Log tabs.

To view detailed LB health check information, follow these steps.

Click the All Services > Networking > Load Balancer menu. You will be taken to the Load Balancer’s Service Home page.

On the Service Home page, click the LB Health Check menu. You will be taken to the LB Health Check List page.

You can modify the column visibility by clicking the Settings button at the top right of the table.

Category	Display option	Detailed description
LB health check name	Basic	LB health check resource name
Service Subnet ID	Basic	VPC Subnet name where the LB health check was created
Number of LB server groups	Basic	Number of LB server groups using LB health check
type	Basic	LB Health Check Type
Protocol	Basic	LB health check protocol
Creation date and time	Basic	LB health check creation timestamp
status	Basic	LB health check resource status

Table. LB health check list items

On the LB Health Check List page, click the resource to view detailed information. You will be taken to the LB Health Check Details page.

LB Health Check Details At the top of the page, status information and descriptions of additional features are displayed.

Category	Detailed description
status	LB health check resource status Active: The service is active and functioning normally Deleting: Processing service termination request Creating: Processing service creation request Error: Unable to determine current status due to an internal error If this status persists, please contact the Support Center Editing: Processing service modification request
Delete LB health check	Delete LB health check resource

Category

Detailed description

status

LB health check resource status

Active: The service is active and functioning normally

Deleting: Processing service termination request

Creating: Processing service creation request

Error: Unable to determine current status due to an internal error
- If this status persists, please contact the Support Center

Editing: Processing service modification request

Delete LB health check

Delete LB health check resource

Table. LB health check status information and additional feature items

Detailed Information

Details tab allows you to view the resource’s detailed information from the LB health check list, and edit the information if needed.

Category	Detailed description
Service	Service name
Resource Type	Resource Type
SRN	Unique resource ID in Samsung Cloud Platform
Resource name	Resource Name
Resource ID	Unique resource ID in the service
constructor	User requesting service creation
Creation date and time	Service creation date and time
Editor	Service modification request user
Modification date and time	Service modification date and time
LB health check name	LB health check name
type	LB health check type
VPC name	VPC to use for LB health check Click the resource name to go to the detail page
Service Subnet name	VPC Subnet for LB health checks Click the resource name to go to the detail page
Health check method	LB health check method configuration information Edit icon can be clicked to modify
description	Additional information about LB health check You can edit by clicking the Edit icon

Table. LB health check detailed information tab items

Connected resource

In the Connected Resources tab, you can view detailed information about the LB server groups associated with the LB Health Check.

Category	Detailed description
LB server group name	LB server group resource name When you click the resource name, navigate to the LB server group detail page
Protocol	LB health check protocol
Load Balancer name	Load Balancer resource name linked to the LB server group
Number of members	Number of members added to the LB server group
Creation date and time	LB server group creation timestamp
status	LB server group resource status Active: The service is active and functioning normally Deleting: Processing service termination request Creating: Processing service creation request Error: Unable to determine current status due to an internal error If this status persists, please contact through the Support Center Editing: Processing service modification request

Table. LB health check connected resource list items

Category	Detailed description
Tag list	Tag list You can view the Key and Value information of the tag Up to 50 tags can be added per resource When entering a tag, you can search and select from the list of previously created Keys and Values

Job History

Work History tab allows you to view the operation history of the selected resource.

Category	Detailed description
Work history	Task execution details
Operation Date/Time	Execution date and time
Resource Type	Resource Type
Resource Name	LB health check name
Work result	Task execution result (success/failure)
Operator Information	User information of the performed operation

Table. LB health check job history list items

Modify LB health check method

LB Health Check Details page allows you to modify the health check method.

To modify the LB health check method, follow these steps.

Click the All Services > Networking > Load Balancer menu. You will be taken to the Load Balancer’s Service Home page.
On the Service Home page, click the LB Health Check menu. You will be taken to the LB Health Check List page.
LB Health Check List page, click the resource you want to edit details for. You will be taken to the LB Health Check Details page.
On the LB Health Check Details page, click the Edit icon of the Health Check Method. You will be taken to the Edit Health Check Method popup.
Modify health check method After editing the required information in the popup window, click the Confirm button.

Cancel LB health check

You can cancel the LB health check service you are not using.

Caution

default type LB health check resource cannot be deleted.
LB health check resources used by the LB server group cannot be deleted.

To disable the LB health check, follow these steps.

Click the All Services > Networking > Load Balancer menu. You will be taken to the Load Balancer’s Service Home page.
On the Service Home page, click the LB Health Check menu. You will be taken to the LB Health Check List page.
Click the resource to terminate from the LB health check list. You will be taken to the LB health check details page.
On the LB Health Check Details page, click the Delete LB Health Check button.
Once the termination is complete, check the resource termination status in the LB health check list.

How-to guides

Create Load Balancer

Check Load Balancer detailed information

Detailed Information

Connected resources

tag

Job History

Load Balancer Resource Management

Create Listener

Creating a Listener in L4 Load Balancer

Creating a Listener in L7 Load Balancer

SSL security level support items

Check Listener detailed information

Detailed Information

L4 Load Balancer Detailed Information

L7 Load Balancer Detailed Information

tag

Job History

Modify routing rules

Delete Listener

Terminate Load Balancer

1 - LB Server Groups

Create LB server group

Check detailed information of LB server group

Detailed Information

Connected resources

tag

Job History

Managing LB Server Group Resources

Add member

Member Edit

Weight modification

Port modification

Activate edit

Delete member

Terminate LB server group

2 - LB Health Check

Create LB health check

View detailed LB health check information

Detailed Information

Connected resource

tag

Job History

Modify LB health check method

Cancel LB health check