GSLB

• 1: Overview
• 2: How-to guides
• 3: API Reference
• 4: CLI Reference
• 5: Release Note

1 - Overview

Service Overview

GSLB (Global Server Load Balancing) automatically distributes network traffic to available adjacent regions on a DNS basis when traffic increases in a specific global region. In case of failure on a specific server, it load balances network traffic to available new resources, allowing the service to continue stably.

Features

• Stable Service Provision: Through the function to check whether connected resources are operating normally (Health Check), if a failure occurs on a specific server, it immediately performs a Failover on that resource and removes it from the domain response, thereby bypassing traffic to other resources to provide stable service.
• Easy Service Port Configuration: You can conveniently create GSLB through a web-based console and set/manage service ports. For L4-level load balancing, multi-port configuration is possible (80, 443, 8080-8090, etc.), and multiple load balancing rules can be applied and managed simultaneously.
• Efficient Cost Management: Charges are determined by applying a detailed billing method based on the number of configured domains, the number of added Health Check resources, and the number of queries, allowing efficient cost management.

Service Configuration Diagram

Provided Functions

The GSLB service provides the following functions.

• GSLB Creation/Management: You can register multiple resources to a single GSLB.
• Distribution Algorithm Selection: Provides the Ratio method, which distributes traffic in proportion to the weight (Weight) for each connection target, and the Round Robin method, which distributes traffic evenly while circulating.
• Health Check Configuration: You can set the check cycle (Interval), service down recognition time (Timeout), response wait time (Probe Timeout), protocol (ICMP, TCP, HTTP, HTTPS), and service port.

Constraints

The constraints of the GSLB service are as follows.

Regional Availability

The GSLB service can be provided in the following environments.

Prerequisite Services

The GSLB service has no prerequisite services.

2 - How-to guides

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

Creating a GSLB

You can create and use a GSLB service through the Samsung Cloud Platform Console.

To request the creation of a GSLB service, follow these steps:

1. Click the All Services > Networking > GSLB menu. You will be redirected to the Service Home page.
2. On the Service Home page, click the Create GSLB button. You will be redirected to the Create GSLB page.
3. On the Create GSLB page, enter the information required to create the service and select detailed options.
   • Enter or select the required information in the Service Information section.

     Division	Required	Description
     Purpose	Required	PUBLIC automatically entered when creating GSLB
     Domain Name	Required	Enter the GSLB domain name to use Enter within 4-40 characters using lowercase English letters and numbers Cannot be used the same as a name already in use
     Add Connection Target > IP	Required	Enter the connection target IP address
     Add Connection Target > Location	Required	Select the location to perform monitoring for the connection target Recommended to specify a location close to the IP server
     Add Connection Target > Description	Optional	Enter additional information or description for the connection target
     Add Connection Target > Connection Target List	Required	Display the added connection target IP, location, description items After entering connection target IP, location, description, click the Add button to add the item Up to 8 connection targets can be added to one GSLB service Click x to delete the item from the list, or click the Delete All button to delete all items in the list

     Table. GSLB service information input items
   • Enter or select the required information in the Connection Target Monitoring Settings section.

     Division	Required	Description
     Health Check	Required	Select the protocol type to perform health check Can select from ICMP, TCP, HTTP, HTTPS (use of HTTPS recommended for security)
     Interval	Required	Enter the time interval (seconds) to perform health check
     Timeout	Required	Enter the waiting time (seconds) to determine the server status (UP or DOWN) during health check
     Probe Timeout	Required	Enter the response waiting time (seconds) Enter domain name (recommended) or directly enter the public IP of the origin server
     Service Port	Required	When using TCP/HTTP/HTTPS protocol, enter the port to use for health check Enter domain name (recommended) or directly enter the public IP of the origin server
     User Name	Optional	When using HTTP/HTTPS protocol, enter the user name to use when authentication is required for health check communication
     Password	Optional	When using HTTP/HTTPS protocol, enter the password to use when authentication is required for health check communication Enter within 8-20 characters including all English letters, numbers, and special characters (@$!%*#?&)
     Send String	Optional	When using HTTP/HTTPS protocol, enter the string to send when checking a specific web page Example) GET /www/example/index.html For HTTP 1.0/1.1, enter line break as /r/n, special characters (<, >, #) cannot be used in the string
     Receive String	Required	When using HTTP/HTTPS protocol, enter the string to receive as health check response Enter only English uppercase/lowercase letters and numbers in the string

     Table. GSLB connection target monitoring settings input items
   • Enter or select the required information in the Load Balancing Policy Settings section.

     Division	Required	Description
     Algorithm	Required	Select the load balancing method Ratio: Distribute traffic proportionally to the weight (Weight) of each connection target Round robin: Distribute traffic equally based on round-robin method
     Connection Target	Required	When selecting Ratio, enter Weight for each connection target Weight is the weight applied to the connection target when distributing service requests, enter within 0 - 100 Click the detailed view icon in the description item to check connection target information

     Table. GSLB load balancing policy input items
   • Enter or select the required information in the Additional Information section.

     Division	Required	Description
     Description	Optional	Enter additional information or description for the GSLB service
     Tags	Optional	Add tags Up to 50 tags can be added per resource Click the Add Tag button and enter or select the Key, Value values

     Table. GSLB additional information input items
4. Review the creation details and click the Create button.
   • When creation is complete, check the created resource on the GSLB List page.

Checking GSLB Detailed Information

For the GSLB service, you can view and modify the entire resource list and detailed information. The GSLB Details page consists of tabs for Detailed Information, Connection Targets, Tags, Operation History.

To check GSLB detailed information, follow these steps:

1. Click the All Services > Networking > GSLB menu. You will be redirected to the GSLB Service Home page.
2. On the Service Home page, click the GSLB menu. You will be redirected to the GSLB List page.
3. On the GSLB List page, click the resource for which you want to check detailed information. You will be redirected to the GSLB Details page.
   • The GSLB Details page displays the status information and detailed information of the GSLB, and consists of tabs for Detailed Information, Connection Targets, Tags, Operation History.

     Division	Description
     Service Status	Status of the GSLB Creating: Creating Active: Operating Editing: Modifying Deleting: Terminating Error: Error occurred
     Terminate Service	Button to terminate GSLB

     Table. GSLB status information and additional features

Detailed Information

On the GSLB List page, you can check the detailed information of the selected resource and modify the information if necessary.

Connection Targets

On the GSLB List page, you can check the connection target information of the selected resource and modify the information if necessary.

Tags

On the GSLB List page, you can check the tag information of the selected resource, and add, change, or delete tags.

Operation History

On the GSLB List page, you can check the operation history of the selected resource.

Modifying Connection Target Information

You can add, modify, or delete GSLB connection target information.

To change GSLB connection target information, follow these steps:

1. Click the All Services > Networking > GSLB menu. You will be redirected to the GSLB Service Home page.
2. On the Service Home page, click the GSLB menu. You will be redirected to the GSLB List page.
3. On the GSLB List page, click the resource for which you want to check detailed information. You will be redirected to the GSLB Details page.
4. On the GSLB Details page, click the Connection Targets tab. You will be redirected to the Connection Targets tab page.
5. On the Connection Targets tab page, click the Modify Connection Target button. You will be redirected to the Modify Connection Target page.
6. On the Modify Connection Target page, modify the desired information.
   • Add: Enter connection target IP, select location, enter description, and click the Add button to add the item.
   • Delete: Click the Delete button to delete the connection target item.
   • You can modify Weight for each item in the connection target list.
7. When modification is complete, click Complete. The modification notification window will open.
8. Click Confirm in the notification window. The service information modification is complete.

Setting Up Regional Routing Controller

You can check the Regional Routing Controller and change the use status.

To change the use status of Regional Routing Controller, follow these steps:

1. Click the All Services > Networking > GSLB menu. You will be redirected to the GSLB Service Home page.

2. On the Service Home page, click the Regional Routing Controller menu. You will be redirected to the Regional Routing Controller List page.

3. On the Regional Routing Controller List page, search for the resource for which you want to check detailed information.

   • Click the Detailed Search button to search by selecting domain, connection location, and use status.

4. On the Regional Routing Controller List page, check the resource information and change the use status.

   Division	Description
   Domain Name	Registered domain name Click the domain name to move to the GSLB Details > Connection Targets tab page
   Purpose	Domain purpose
   Connection Location	Location to perform monitoring for the connection target
   Connection Targets by Location	Number of connection targets by location
   Use Status	Display connection target use setting status, click the more button to change use status Use: Set connection target to use Stop: Stop connection target use You can also set use by selecting the domain in the list and selecting Use or Stop at the top

   Table. Regional Routing Controller list

5. Click Confirm in the notification window. The domain use status change is complete.

Terminating GSLB

You can apply for the termination of the GSLB service from the Samsung Cloud Platform Console.

To request the termination of the GSLB service, follow these steps:

1. Click the All Services > Networking > GSLB menu. You will be redirected to the GSLB Service Home page.
2. On the Service Home page, click the GSLB menu. You will be redirected to the GSLB List page.
3. On the GSLB List page, click the resource for which you want to check detailed information. You will be redirected to the GSLB Details page.
4. On the GSLB Details page, click the Terminate Service button.
5. When termination is complete, check the service termination status on the GSLB list.

3 - API Reference

4 - CLI Reference

5 - Release Note

GSLB