How-to guides

• 1: LB Server Group
• 2: LB Health Check

1 - LB Server Group

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

Create LB server group

To create an LB server group, follow the steps below.

1. All Services > Networking > Load Balancer Click the menu. Navigate to the Service Home page of Load Balancer.
2. On the Service Home page, click LB server group. Navigate to the LB server group list page.
3. Click the Create LB Server Group button on the LB Server Group List page. It navigates to the Create LB Server Group page.
4. Create LB Server Group 페이지에서 서비스 생성에 필요한 정보를 입력하고 상세 옵션을 선택하세요.
   • Enter Service Information area, input or select the required information.

     Category	Required	Detailed description
     LB server group name	Required	LB server group resource name Enter 3~63 characters using English letters (uppercase and lowercase), numbers, and special characters (-_) LB server group name must be unique within the Account
     VPC	Required	Select VPC to create LB server group Select VPC where the Load Balancer that will connect to the LB server group is created
     Service Subnet	Required	Select VPC Subnet to create LB server group Select Subnet where Load Balancer that will connect to LB server group is created
     Load Balancing	Required	Select load balancing algorithm Round Robin: Distribute sequentially to 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 member with higher priority considering the weight assigned to each member and the number of connections IP Hash: Distribute to a specific member based on the hash value of the client IP address
     Protocol	Required	Select LB server group receive protocol Select the protocol to deliver to members of the LB server group
     LB health check	Required	Select LB health check Select from LB health checks created in the same Service Subnet as the LB server group

     Table. LB Server Group Service Information Input Items
   • Enter additional information Enter or select the required information in the area.

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

     Table. LB Server Group Additional Information Input Items
5. Check the created service information and the estimated billing amount, and click the Complete button.

• Once creation is complete, check the created resources on the LB Server Group List page.

Check LB server group detailed information

LB server group menu allows you to view and edit the resource list and detailed information. The LB server group details page consists of Details, Connected Resources, Tags, Activity Log tabs.

To view detailed information of the LB server group, follow the steps below.

1. All Services > Networking > Load Balancer Click the menu. Navigate to the Service Home page of Load Balancer.

2. On the Service Home page, click LB server group. It navigates to the LB server group list page.

   • Column display can be modified by clicking the Settings button at the top right of the table.

     Category	Display status	Detailed description
     LB server group name	default	LB server group resource name
     Protocol	Default	LB Server Group Protocol
     Load Balancer	Default	Load Balancer resource name connected to LB server group
     LB Health Check	Default	Name of LB health check resource used by LB server group
     Member count	Default	Number of members registered in LB server group
     Creation Time	Default	LB Server Group Creation Time
     Status	Default	LB Server Group Resource Status

     Table. LB server group list item

3. Click the resource to view detailed information on the LB Server Group List page. It moves to the LB Server Group Details page.

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

  Category	Detailed description
  Status	LB server group resource status Active: Service is normally activated Deleting: Processing service termination request Creating: Processing service creation request Error: Cannot determine current status due to internal error If this status persists, contact via 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

​ Detailed Information tab allows you to view detailed information of resources in the LB server group list, and modify the information if needed.

Linked Resources

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

Tag

LB server group list page, you can view the tag information of the selected resource, and you can add, modify, or delete it.

Work History

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

Managing LB Server Group Resources

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

Add Member

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

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

1. All Services > Networking > Load Balancer Click the menu. Go to the Load Balancer’s Service Home page.

2. Click LB server group on the Service Home page. You will be taken to the LB server group list page.

3. Click the resource to edit detailed information on the LB Server Group List page. You will be taken to the LB Server Group Details page.

4. LB Server Group Details 페이지에서 Connected Resources 탭을 클릭하세요. Connected Resources 탭 페이지로 이동합니다.

5. Click the Add Member button at the top right of the Connected Resources tab page.

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

   Category	Required	Detailed description
   LB server group name	Default	LB server group name to add members
   Target Server	Required	Server information to add as member Virtual Server/Bare Metal Server: Select from the list of servers created in the same VPC as the LB server group Direct IP input: Directly input server IP Add button can be clicked to add target server
   Member Information	Required	Member Port and Weight Settings Member Name: Display server name and IP to be added as a member Port: Port that the member will receive Weight: Weight applied to load balancing When using Weighted Round Robin or Weighted Least Connection load balancing, a value between 1 and 1000 is required

   Table. LB server group member addition items

7. Check whether members have been added in the Connected Resources tab.

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 detail information, and you can click the Edit icon to change the information.

Weight Modification

Member weight can be modified by following the steps below. It can be modified when using weighted load balancing (Weighted Round Robin, Weighted Least Connection).

1. All Services > Networking > Load Balancer Click the menu. Navigate to the Service Home page of the Load Balancer.
2. Click LB Server Group on the Service Home page. You will be taken to the LB Server Group List page.
3. Click the resource to edit detailed information on the LB Server Group List page. You will be taken to the LB Server Group Details page.
4. LB Server Group Details 페이지에서 Connected Resources 탭을 클릭하세요. Connected Resources 탭 페이지로 이동합니다.
5. Connected Resources tab page, click the member to edit. Navigate to the Member Details page.
6. Click the Edit Weight button on the Member Details page.
7. Weight Modification In the popup, enter the weight to modify and click the Confirm button.
8. Check whether the weight has been modified in the Connected Resources tab.

Port Edit

To modify the member port, follow the steps below.

1. All Services > Networking > Load Balancer Click the menu. Navigate to the Service Home page of Load Balancer.
2. Click LB Server Group on the Service Home page. You will be taken to the LB Server Group List page.
3. Click the resource to edit detailed information on the LB Server Group List page. You will be taken to the LB Server Group Details page.
4. LB Server Group Details 페이지에서 Connected Resources 탭을 클릭하세요. Connected Resources 탭 페이지로 이동합니다.
5. Click the member to edit on the Connected Resources tab page. You will be taken to the Member Details page.
6. Member Details 페이지에서 Edit Port 버튼을 클릭하세요.
7. Port Modification In the popup, enter the port to modify and click the Confirm button.
8. Connected Resources tab, check whether the port has been modified.

Activation Edit

To modify member activation, follow these steps.

1. All Services > Networking > Load Balancer Click the menu. Go to the Load Balancer’s Service Home page.
2. Click LB server group on the Service Home page. You will be taken to the LB server group list page.
3. Click the resource to edit detailed information on the LB Server Group List page. It moves to the LB Server Group Details page.
4. Click the Connected Resources tab on the LB Server Group Details page. You will be taken to the Connected Resources tab page.
5. Connected Resources 탭 페이지에서 수정할 멤버를 클릭하세요. Member Details 페이지로 이동합니다.
6. Member Details 페이지에서 Edit Activation 버튼을 클릭하세요.
7. Edit Activation in the popup select Disable or Enable and click the Confirm button.
8. Check whether activation editing is enabled in the Connected Resources tab.

Member Deletion

To delete unused members, follow the steps below.

1. All Services > Networking > Load Balancer menu. Navigate to the Load Balancer’s Service Home page.
2. Click LB Server Group on the Service Home page. You will be taken to the LB Server Group List page.
3. Click the resource to edit detailed information on the LB Server Group List page. You will be taken to the LB Server Group Details page.
4. Click the Connected Resources tab on the LB Server Group Details page. Connected Resources tab page will be displayed.
5. Connected Resources tab page, click the member to delete. You will be taken to the Member Details page.
6. Click the Delete Member button on the Member Details page.
7. In the Connected Resources tab, verify if the member has been deleted.

Cancel LB server group

You can cancel an unused LB server group. However, since it may affect the application service, please request cancellation after sufficient prior review.

To cancel the LB server group, follow the steps below.

1. All Services > Networking > Load Balancer Click the menu. Navigate to the Service Home page of Load Balancer.
2. Click LB Server Group on the Service Home page. You will be taken to the LB Server Group List page.
3. Click the resource to be terminated in the LB server group list. You will be taken to the LB server group details page.
4. Click the Delete LB Server Group button on the LB Server Group Details page.
5. When the termination is completed, 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.

LB Create health check

LB health check를 생성하려면 다음 절차를 따르세요.

1. All Services > Networking > Load Balancer Click the menu. Navigate to the Service Home page of the Load Balancer.
2. Click LB Health Check on the Service Home page. You will be taken to the LB Health Check List page.
3. LB Health Check List on the page, click the LB Health Check Create button. Navigate to the LB Health Check Create page.
4. LB Health Check Creation page, enter the information required to create the service and select detailed options.
   • 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 letters (uppercase and lowercase), numbers, and special characters (-_) with 3 to 63 characters LB health check name cannot be duplicated within an Account
     VPC	Required	Select VPC to create LB health check Select the VPC where the LB server group that will use the LB health check is created
     Service Subnet	Required	Select VPC Subnet to create LB health check Select Subnet where the LB server group that will use the LB health check is created
     Health Check Method > Protocol	Required	Health Check Protocol Select TCP or HTTP as the protocol to use for member health checks
     Health Check Method > Health Check Port	Required	Health Check Port Enter a value between 1 and 65,534 to be used as the port for member health checks
     Health check method > Interval	Required	Health check interval Default 5 seconds, input possible within 1~180 seconds
     Health Check Method > Wait Time	Required	Health Check Response Wait Time Default 5 seconds, input possible within 1~180 seconds Cannot set a value larger than the interval
     Health Check Method > Detection Count	Required	Number of times to determine health check status Default is 3 times, input possible within 1~10
     Health check method > HTTP method	Required	HTTP request method setting (HTTP protocol used when setting) Select GET, POST
     Health Check Method > URL Monitor	Required	Enter health check URL path (HTTP protocol setting when used) Enter using English letters, numbers, special characters (/.-_?&=) within 50 characters
     Health Check Method > Response Code	Required	Enter the HTTP response code to be received from the server (HTTP protocol used when setting) Enter response codes in the 200~500 range
     Health check method > Request string	Required	Enter health check request string (set when using HTTP protocol POST method) Enter the content to be included in the Request Body using English letters, numbers, special characters (/.-_?&=) within 255 bytes

     Table. LB Health Check Service Information Input Items
   • Enter additional information Please input or select the required information in the area.

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

     Table. LB server group additional information input items
5. Summary Check the service information and estimated billing amount generated in the panel, and click the Complete button.
   • When creation is complete, check the created resources on the LB Health Check List page.

LB Health Check Check detailed information

LB Health Check menu allows you to view and edit the resource list and detailed information. LB Health Check Details page consists of Details, Connected Resources, Tags, Operation History tabs.

To check the detailed LB health check information, follow the steps below.

1. All Services > Networking > Load Balancer Click the menu. Navigate to the Load Balancer’s Service Home page.

2. Click LB Health Check on the Service Home page. Navigate to the LB Health Check List page.

   • Column display can be modified by clicking the Settings button at the top right of the table.

     Category	Display status	Detailed description
     LB Health Check Name	Default	LB Health Check Resource Name
     Service Subnet	Default	VPC Subnet name where LB health check is created
     LB server group count	default	LB server group count using health check
     Type	Default	LB health check type
     Protocol	Default	LB Health Check Protocol
     Creation Time	Default	LB Health Check Creation Time
     Status	Default	LB health check resource status

     Table. LB health check list items

3. LB Health Check List page, click the resource to view detailed information. LB Health Check Details page will be opened.

   • 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 properly activated Deleting: Processing service termination request Creating: Processing service creation request Error: Cannot determine current status due to internal error If this status persists, please contact the Support Center. Editing: Processing service modification request
     LB health check delete	LB health check resource delete

     Table. LB Health Check Status Information and Additional Feature Items

Detailed Information

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

Connected Resources

Connected Resources tab allows you to view detailed information of the LB server group linked to LB Health Check.

Tag

LB Health Check List page allows you to view the tag information of the selected resource, and you can add, modify, or delete it.

Work History

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

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 the steps below.

1. All Services > Networking > Load Balancer Click the menu. Navigate to the Service Home page of the Load Balancer.
2. Click LB Health Check on the Service Home page. You will be taken to the LB Health Check List page.
3. Click the resource to edit detailed information on the LB Health Check List page. You will be taken to the LB Health Check Details page.
4. LB Health Check Details page, click the Edit icon of Health Check Method. You will be taken to the Edit Health Check Method popup.
5. Modify health check method After editing the required information in the popup window, click the Confirm button.

LB Health Check Cancellation

You can cancel the unused LB health check service.

To cancel the LB health check, follow the steps below.

1. All Services > Networking > Load Balancer > LB Health Check menu를 클릭하세요. LB Health Check List 페이지로 이동합니다.
2. Click the resource to cancel in the LB health check list. You will be taken to the LB health check details page.
3. Click the Delete LB Health Check button on the LB Health Check Details page.
4. If termination is completed, check the resource termination status in the LB health check list.