Add README/output/example vars to ILB example

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Dana Hoffman 2016-12-19 11:49:49 -08:00
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# Internal Load Balancing in Google Cloud
This provides a template for setting up internal load balancing in Google Cloud. It directly mirrors the tutorial in the [GCP Internal Load Balancing Documentation](https://cloud.google.com/compute/docs/load-balancing/internal/).
To run the example, you'll need to [download your credentials from Google Cloud Console](https://www.terraform.io/docs/providers/google/#credentials). A suggested path for the downloaded file is `~/.gcloud/Terraform.json`.
Optionally update `variables.tf` to specify a default value for the `project_name` variable, and check other variables.
After you run `terraform apply` on this configuration, it will
automatically output the internal IP address of the load balancer.
Since the load balancer is only reachable from within the network, ssh into the standalone instance using
```
gcloud compute ssh --zone us-central1-b standalone-instance-1
```
Using `curl` on the IP address given, the LB should respond with a simple header:
```html
<!doctype html><html><body><h1>ilb-instance-X</h1></body></html>
```
To run, configure your Google Cloud provider as described in
https://www.terraform.io/docs/providers/google/index.html
Run with a command like this:
```
terraform apply \
-var="region=us-central1" \
-var="region_zone=us-central1-b" \
-var="region_zone_2=us-central1-c" \
-var="project_name=my-project-id-123" \
-var="credentials_file_path=~/.gcloud/Terraform.json"
```

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output "internal_load_balancer_ip" {
value = "${google_compute_forwarding_rule.my-int-lb-forwarding-rule.ip_address}"
}

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region = "us-central1"
region_zone = "us-central1-b"
region_zone2 = "us-central1-c"
project_name = "my-project-id-123"
credentials_file_path = "~/.gcloud/Terraform.json"