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Internal Load Balancer Terraform Module

Modular Internal Load Balancer for GCE using forwarding rules.

Load Balancer Types

• TCP load balancer
• HTTP/S load balancer
• Internal load balancer

Compatibility

This module is meant for use with Terraform 0.13+ and tested using Terraform 1.0+. If you find incompatibilities using Terraform >=0.13, please open an issue. If you haven't upgraded and need a Terraform 0.12.x-compatible version of this module, the last released version intended for Terraform 0.12.x is v2.3.0.

Upgrading

The current version is 2.X. The following guides are available to assist with upgrades:

• 1.X -> 2.0

Usage

module "gce-ilb" {
  source       = "GoogleCloudPlatform/lb-internal/google"
  version      = "~> 2.0"
  region       = var.region
  name         = "group2-ilb"
  ports        = ["80"]
  health_check = var.health_check
  source_tags  = ["allow-group1"]
  target_tags  = ["allow-group2", "allow-group3"]
  backends     = [
    { group = module.mig2.instance_group, description = "", failover = false },
    { group = module.mig3.instance_group, description = "", failover = false },
  ]
}

Resources created

• google_compute_forwarding_rule.default: The internal regional forwarding rule.
• google_compute_region_backend_service.default: The backend service registered to the given instance_group.
• google_compute_health_check.tcp: The TCP health check for the instance_group targets.
• google_compute_health_check.http: The HTTP health check for the instance_group targets.
• google_compute_health_check.https: The HTTPS health check for the instance_group targets.
• google_compute_firewall.default-ilb-fw: Firewall rule that allows traffic from the source_tags resources to target_tags on the service_port.
• google_compute_firewall.default-hc: Firewall rule that allows traffic for health checks to the target_tags resources.