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Overview

    Service Overview

    GSLB (Global Server Load Balancing) automatically distributes network traffic to an available adjacent region based on DNS when traffic increases in a specific global area. When a specific server fails, we load‑balance network traffic to an available new resource to ensure the service continues reliably.

    Features

    • Stable Service Provision: By using the health check function (Health Check) that verifies the normal operation of connected resources, if a failure occurs on a specific server, the resource is immediately Fail over and removed from domain responses, redirecting traffic to other resources to provide stable service.
    • Easy Service Port Configuration: Through the web-based console, you can conveniently create GSLB and set/manage service ports. For L4-level load balancing, multiple ports can be configured (e.g., 80, 443, 8080-8090), and you can apply and manage several load balancing rules simultaneously.
    • Efficient Cost Management: Because the billing method is granularly applied so that fees are determined based on the number of configured domains, the number of added Health Check resources, and the number of queries, costs can be managed efficiently.

    Service Architecture Diagram

    Diagram
    Figure. GSLB Diagram

    Provided features

    The GSLB service provides the following features.

    • GSLB Creation/Management: You can register multiple resources to a single GSLB.
    • Load Balancing Algorithm Selection: Provides the Ratio method, which distributes traffic proportionally to the weight (Weight) of each connection target, and the Round Robin method, which cycles traffic and distributes it evenly.
    • Health Check Settings: check interval (Interval), service down detection time (Timeout), response wait time (Probe Timeout), protocols (ICMP, TCP, HTTP, HTTPS), and service ports can be configured.

    Constraints

    The limitations of the GSLB service are as follows.

    CategoryExplanation
    Maximum number of domains that can be created per account20
    Maximum number of connectable resources per domain8
    Table. GSLB constraints
    Reference
    • For GSLB to monitor the target, an allow rule must be added to the target resource’s firewall and security group.

    Provision status by region

    The GSLB service is available in the environments below.

    RegionProvision status
    Korea West (kr-west1)Provide
    Korea East (kr-east1)Provided
    South Korea South 1 (kr-south1)Not provided
    South Korea 2 (kr-south2)Not provided
    South Korea South 3 (kr-south3)Not provided
    Table. GSLB provision status by region

    Preliminary Service

    The GSLB service has no prerequisite services.