Google CloudLive-testedattested

Internal Passthrough Load Balancer (L4)

An internal passthrough L4 load balancer - health check, regional backend service and forwarding rule - that stands up before any backends exist, preserving client source IPs, with optional global access.

terraformGoogle Cloudgcp

Compare Load Balancer across clouds →

gcp-internal-lbvizier v1.2.0

Verification

Live-tested

Really deployed to a cloud sandbox, verified against its outputs and assertions, then destroyed - with the teardown confirmed.

Conformance

  • Static validation (fmt · validate · tflint)
  • Security scan clean (Checkov)
  • Plan test superseded by live test

Provenance

Functional

  • Live-tested - applied, verified, destroyed

Last verified 2026-06-30 · how we verify

Verify this download

cosign · sha-256

Don't take our word for it. Every release is signed with cosign - check the bytes against our pinned public key before you trust them.

# 1. Our pinned public key - fetch once, trust out-of-band
curl -O https://www.iac-bazaar.com/cosign.pub

# 2. This module's Sigstore bundle
curl -o gcp-internal-lb-1.0.0.sigstore.json \
  https://www.iac-bazaar.com/api/artifacts/gcp-internal-lb/signature

# 3. Verify the tarball you downloaded
cosign verify-blob \
  --key cosign.pub \
  --bundle gcp-internal-lb-1.0.0.sigstore.json \
  gcp-internal-lb-1.0.0.tar.gz
# → Verified OK

# 4. (optional) confirm the checksum too
echo "4435eca6a844f5ba5b3532c9d468aee18d39686bfcf4b82498633bb8141800f9  gcp-internal-lb-1.0.0.tar.gz" | sha256sum -c

Use it from the registry

terraform · opentofu
module "internal_lb" {
  source  = "www.iac-bazaar.com/iac-bazaar/gcp-internal-lb/gcp"
  version = "1.0.0"
}

Needs a registry token from /account/tokens. The module itself is free; the account is what identifies you. Full setup: registry docs.

Cite it in your README

badge · attribution

Paste this beside the module in the repository that uses it. The badge is rendered from this artifact's verification record, so it reads live-tested because the record says so, and the link lands on this page.

README.md, GitLab, Gitea
[![IaC Bazaar: live-tested](https://www.iac-bazaar.com/api/artifacts/gcp-internal-lb/badge)](https://www.iac-bazaar.com/catalog/gcp-internal-lb?utm_source=syndication&utm_medium=readme&utm_campaign=artifact)

Terraform module 1.0.0, live-tested on IaC Bazaar: [Internal Passthrough Load Balancer (L4)](https://www.iac-bazaar.com/catalog/gcp-internal-lb?utm_source=syndication&utm_medium=readme&utm_campaign=artifact)

```hcl
module "internal_lb" {
  source  = "www.iac-bazaar.com/iac-bazaar/gcp-internal-lb/gcp"
  version = "1.0.0"
}
```

Preview:IaC Bazaar: live-tested

Inputs & outputs

Create a free account to read this module's contract

The declared contract - every input name, type, default and description, plus every output - is shown to signed-in accounts, not to anonymous visitors.

A free account sees the contract of every module in the catalogue. There is no subscription and nothing to buy - the modules are free to download, and they run under Vizier.

Documentation

gcp-internal-lb

An internal passthrough Network Load Balancer: a health check, a regional backend service (load_balancing_scheme = INTERNAL), and an internal forwarding rule. Backends are optional, so the LB stands up before — or without — any instance groups; wire MIGs in as they come online. Works with Terraform and OpenTofu (>= 1.6), Google provider >= 7.0, < 8.0.

What you get:

  • A google_compute_health_check (TCP by default; HTTP/HTTPS supported)
  • A regional google_compute_region_backend_service (INTERNAL, balancing_mode = CONNECTION) with optional instance-group backends
  • An internal google_compute_forwarding_rule on your VPC subnet, with an auto-allocated (or static) internal IP

Requirements

RequirementVersion
Terraform / OpenTofu>= 1.6
hashicorp/google>= 7.0, < 8.0

License

Commercial — IaC Bazaar EULA. © IaC Bazaar. Original work (not derived from a third-party module).

Usage code & full reference need an account

The complete copy-paste usage, the full input/output reference, and operational notes are free with an account - shown here and bundled in the download. Sign in and this section fills in.

  • Usage
  • Inputs
  • Outputs

Related modules

Live-tested

gcp-http-load-balancer

Global ALB with managed TLS certs, URL map, serverless/instance NEG backends, optional Cloud CDN and Cloud Armor policy.

View module
Static validatedLive test pending

tencent-clb

A listener's health check is a switch that, off, sends traffic to every target forever; a port-80 listener forwards unless a redirection resource points it at 443; and delete_protect defaults to false. HTTP health checks on a path through listener rules, a 301 from 80 to 443 whenever a certificate is given, deletion protection on, access logs when a CLS topic is given.

View module
Static validatedLive test pending

huawei-elb

The default TLS policy accepts TLS 1.0; a pool without a monitor resource is never unhealthy and sends traffic to every member forever; an HTTPS listener does nothing about port 80 until an L7 policy redirects it; and deletion protection is off. tls-1-2-strict, an HTTP monitor on a path, a redirect on 80 whenever a certificate is given, two zones unless one is accepted, deletion protection on.

View module
Static validatedLive test pending

vultr-load-balancer

The default health check is TCP on the backend port, which a process that stopped serving still passes; ssl_redirect defaults to false, so the site stays in clear on 80; and a balancer with no instances is a public address that fails. HTTP checks on a path, redirect on whenever HTTPS exists, backends required, and a Let's Encrypt certificate from auto_ssl_domain rather than a pasted key in state.

View module
Static validatedLive test pending

do-load-balancer

The default health check is a TCP handshake, which a process that stopped serving still passes; redirect_http_to_https defaults to false, so the site stays in clear on 80; and a balancer with no tag and no droplets is a public address that 503s. HTTP checks on a path, redirect on whenever HTTPS exists, STRONG ciphers, backends required, and a Let's Encrypt certificate made from your domains.

View module
Static validatedLive test pending

upcloud-load-balancer

The backend health check defaults to TCP, which a process that stopped serving still passes; TLS is a certificate bundle nobody creates; a port-80 frontend forwards unless a rule redirects it; and a public network puts the frontend on the internet. HTTP checks on a path (TCP by name), a Let's Encrypt bundle for the hostnames you list, a 301 from 80 whenever it exists, and public by name.

View module