Add Terraform config for Google Cloud Platform
Supports: - Ubuntu 14.04 LTS - RHEL 6 - RHEL 7 - CentOS 6 - CentOS 7
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## Running the Google Cloud Platform templates to set up a Consul cluster
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The platform variable defines the target OS, default is `ubuntu`.
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Supported Machine Images:
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- Ubuntu 14.04 (`ubuntu`)
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- RHEL6 (`rhel6`)
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- RHEL7 (`rhel7`)
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- CentOS6 (`centos6`)
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- CentOS7 (`centos7`)
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For Google Cloud provider, set up your environment as outlined here: https://www.terraform.io/docs/providers/google/index.html
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To set up a Ubuntu based cluster, replace `key_path` with actual value and run:
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```shell
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terraform apply -var 'key_path=/Users/xyz/consul.pem'
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```
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_or_
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```shell
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terraform apply -var 'key_path=/Users/xyz/consul.pem' -var 'platform=ubuntu'
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```
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To run RHEL6, run like below:
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```shell
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terraform apply -var 'key_path=/Users/xyz/consul.pem' -var 'platform=rhel6'
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```
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**Note:** For RHEL and CentOS based clusters, you need to have a [SSH key added](https://console.cloud.google.com/compute/metadata/sshKeys) for the user `root`.
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resource "google_compute_instance" "consul" {
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count = "${var.servers}"
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name = "consul-${count.index}"
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zone = "${var.region_zone}"
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tags = ["${var.tag_name}"]
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machine_type = "${var.machine_type}"
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disk {
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image = "${lookup(var.machine_image, var.platform)}"
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}
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network_interface {
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network = "default"
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access_config {
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# Ephemeral
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}
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}
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service_account {
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scopes = ["https://www.googleapis.com/auth/compute.readonly"]
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}
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connection {
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user = "${lookup(var.user, var.platform)}"
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key_path = "${var.key_path}"
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}
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provisioner "file" {
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source = "${path.module}/../shared/scripts/${lookup(var.service_conf, var.platform)}"
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destination = "/tmp/${lookup(var.service_conf_dest, var.platform)}"
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}
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provisioner "remote-exec" {
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inline = [
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"echo ${var.servers} > /tmp/consul-server-count",
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"echo ${google_compute_instance.consul.0.network_interface.0.address} > /tmp/consul-server-addr",
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]
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}
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provisioner "remote-exec" {
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scripts = [
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"${path.module}/../shared/scripts/install.sh",
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"${path.module}/../shared/scripts/service.sh",
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"${path.module}/../shared/scripts/ip_tables.sh",
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]
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}
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}
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resource "google_compute_firewall" "consul_ingress" {
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name = "consul-internal-access"
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network = "default"
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allow {
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protocol = "tcp"
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ports = [
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"8300", # Server RPC
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"8301", # Serf LAN
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"8302", # Serf WAN
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"8400", # RPC
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]
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}
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source_tags = ["${var.tag_name}"]
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target_tags = ["${var.tag_name}"]
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}
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output "server_address" {
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value = "${google_compute_instance.consul.0.network_interface.0.address}"
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}
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variable "platform" {
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default = "ubuntu"
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description = "The OS Platform"
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}
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variable "user" {
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default = {
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ubuntu = "ubuntu"
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rhel6 = "root"
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rhel7 = "root"
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centos6 = "root"
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centos7 = "root"
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}
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}
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variable "machine_image" {
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default = {
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ubuntu = "ubuntu-os-cloud/ubuntu-1404-trusty-v20160314"
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rhel6 = "rhel-cloud/rhel-6-v20160303"
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rhel7 = "rhel-cloud/rhel-7-v20160303"
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centos6 = "centos-cloud/centos-6-v20160301"
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centos7 = "centos-cloud/centos-7-v20160301"
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}
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}
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variable "service_conf" {
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default = {
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ubuntu = "debian_upstart.conf"
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rhel6 = "rhel_upstart.conf"
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rhel7 = "rhel_consul.service"
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centos6 = "rhel_upstart.conf"
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centos7 = "rhel_consul.service"
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}
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}
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variable "service_conf_dest" {
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default = {
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ubuntu = "upstart.conf"
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rhel6 = "upstart.conf"
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rhel7 = "consul.service"
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centos6 = "upstart.conf"
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centos7 = "consul.service"
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}
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}
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variable "key_path" {
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description = "Path to the private key used to access the cloud servers"
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}
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variable "region" {
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default = "us-central1"
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description = "The region of Google Cloud where to launch the cluster"
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}
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variable "region_zone" {
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default = "us-central1-f"
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description = "The zone of Google Cloud in which to launch the cluster"
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}
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variable "servers" {
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default = "3"
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description = "The number of Consul servers to launch"
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}
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variable "machine_type" {
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default = "f1-micro"
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description = "Google Cloud Compute machine type"
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}
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variable "tag_name" {
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default = "consul"
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description = "Name tag for the servers"
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}
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