Build Global Accelerator endpoint group configurations for multi-region traffic.
Last verified: May 2026
Build Global Accelerator endpoint configs with listeners, endpoint groups, and health checks.
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NameListenersEndpointGroups[0].EndpointGroupRegionEndpointGroups[0].EndpointConfigurationsOutput will appear here...AWS Global Accelerator provides static anycast IP addresses that route traffic through the AWS global network to optimal endpoints in multiple regions. Unlike CloudFront which caches content, Global Accelerator is a network-layer service that improves performance for TCP and UDP traffic by reducing internet hops. Configuration involves defining listeners, endpoint groups per region, and health check settings. The Global Accelerator Config Builder helps you set up endpoint group configurations with traffic dials, health check parameters, and endpoint weights for multi-region architectures.
Your team's gaming backend serves UDP traffic with strict latency requirements. CloudFront doesn't support UDP. The builder generates a Global Accelerator config: 2 endpoint groups (us-east-1 and eu-west-1), listener for UDP ports 7000-7100, EC2 endpoints in each region with health checks. Players in the US route to us-east-1 via the AWS backbone (not public internet); players in Europe route to eu-west-1. Latency drops 30-50ms vs serving from a single region. When us-east-1 capacity hits limits, you drop its traffic dial to 50% and 50% of new connections route to eu-west-1 — graceful capacity management without DNS changes.
Global Accelerator costs ~$18/month per accelerator + data transfer. For HTTP/HTTPS traffic, CloudFront is almost always cheaper because it's the same SLA at a lower base cost. Reserve Global Accelerator for non-HTTP traffic (gaming, IoT) or applications that genuinely need static anycast IPs.
Traffic dial percentages are the right way to do gradual region failover. Need to drain a region for maintenance? Drop its traffic dial to 0 — connections gracefully drain to other regions. Setting it back to 100 restores traffic. Faster and safer than updating Route 53 weighted records.
Health check failures fail over within ~30 seconds in Global Accelerator vs Route 53's 60-90+ seconds. For applications where DNS-based failover is too slow (database fail-overs, financial systems), this latency advantage justifies the additional cost.
The builder constructs Global Accelerator configurations with: accelerator (name, IP address type), listeners (port ranges, protocol TCP/UDP, client affinity), endpoint groups (per-region with traffic dial percentage, health check config), and endpoints (ALBs, NLBs, EC2 instances, Elastic IPs with weights). Output is generated as aws globalaccelerator create commands and Terraform aws_globalaccelerator_* resources.
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