Add Load Balancer example.

terraform-digitalocean-modules · Jan 16, 2019 · 4ba0aed · 4ba0aed
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diff --git a/examples/loadbalancer/README.md b/examples/loadbalancer/README.md
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+# Loadbalancer example
+
+An example of provisioning Droplets attached to a Load Balancer using tags.
+
+## Usage
+
+To run this example you need to execute:
+
+```bash
+$ terraform init
+$ terraform plan
+$ terraform apply
+```
+
+Now visit your Load Balancer IP in a browser and refresh. You should see the
+requests are sent to each Droplet.
+
+Note that this example may create resources which can cost money.
+Run `terraform destroy` when you don't need these resources.
+
+<!-- BEGINNING OF PRE-COMMIT-TERRAFORM DOCS HOOK -->
+## Inputs
+
+| Name | Description | Type | Default | Required |
+|------|-------------|:----:|:-----:|:-----:|
+| do\_token | - | string | - | yes |
+
+## Outputs
+
+| Name | Description |
+|------|-------------|
+| loadbalancer\_ip | IP address of the Load Balancer |
+| web\_ipv4\_address | List of IPv4 addresses of web Droplets |
+
+<!-- END OF PRE-COMMIT-TERRAFORM DOCS HOOK -->
diff --git a/examples/loadbalancer/main.tf b/examples/loadbalancer/main.tf
@@ -0,0 +1,44 @@
+variable "do_token" {}
+
+provider "digitalocean" {
+  token = "${var.do_token}"
+}
+
+resource "digitalocean_tag" "ENV_example" {
+  name = "ENV:example"
+}
+
+resource "digitalocean_tag" "ROLE_web" {
+  name = "ROLE:web"
+}
+
+module "web" {
+  source = "../../"
+
+  droplet_count = 2
+
+  droplet_name = "example-web"
+  droplet_size = "nano"
+  tags         = ["${digitalocean_tag.ENV_example.id}", "${digitalocean_tag.ROLE_web.id}"]
+  user_data    = "${file("user-data.web")}"
+}
+
+resource "digitalocean_loadbalancer" "public" {
+  name   = "web-balancer"
+  region = "ams3"
+
+  forwarding_rule {
+    entry_port     = 80
+    entry_protocol = "http"
+
+    target_port     = 80
+    target_protocol = "http"
+  }
+
+  healthcheck {
+    port     = 22
+    protocol = "tcp"
+  }
+
+  droplet_tag = "${digitalocean_tag.ROLE_web.name}"
+}
diff --git a/examples/loadbalancer/output.tf b/examples/loadbalancer/output.tf
@@ -0,0 +1,9 @@
+output "loadbalancer_ip" {
+  description = "IP address of the Load Balancer"
+  value       = "${digitalocean_loadbalancer.public.ip}"
+}
+
+output "web_ipv4_address" {
+  description = "List of IPv4 addresses of web Droplets"
+  value       = "${module.web.ipv4_address}"
+}
diff --git a/examples/loadbalancer/user-data.web b/examples/loadbalancer/user-data.web
@@ -0,0 +1,5 @@
+#cloud-config
+
+runcmd:
+  - apt-get install -y nginx
+  - 'echo "<html><body><h2>$(hostname)</h2></body></html>" > /var/www/html/index.html'