examples: add OpenStack configuration with networking

This commit is contained in:
Christian Berendt 2015-08-27 17:13:59 +02:00
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commit f6d69164e8
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# Basic OpenStack architecture with networking
This provides a template for running a simple architecture on an OpenStack
cloud.
To simplify the example, this intentionally ignores deploying and
getting your application onto the servers. However, you could do so either via
[provisioners](https://www.terraform.io/docs/provisioners/) and a configuration
management tool, or by pre-baking configured images with
[Packer](http://www.packer.io).
After you run `terraform apply` on this configuration, it will output the
floating IP address assigned to the instance. After your instance started,
this should respond with the default nginx web page.
First set the required environment variables for the OpenStack provider by
sourcing the [credentials file](http://docs.openstack.org/cli-reference/content/cli_openrc.html).
```
source openrc
```
Afterwards run with a command like this:
```
terraform apply \
-var 'external_gateway=c1901f39-f76e-498a-9547-c29ba45f64df' \
-var 'pool=public'
```
To get a list of usable floating IP pools run this command:
```
$ nova floating-ip-pool-list
+--------+
| name |
+--------+
| public |
+--------+
```
To get the UUID of the external gateway run this command:
```
$ neutron net-show FLOATING_IP_POOL
+---------------------------+--------------------------------------+
| Field | Value |
+---------------------------+--------------------------------------+
| admin_state_up | True |
| id | c1901f39-f76e-498a-9547-c29ba45f64df |
| mtu | 0 |
| name | public |
| port_security_enabled | True |
| provider:network_type | vxlan |
| provider:physical_network | |
| provider:segmentation_id | 1092 |
| router:external | True |
| shared | False |
| status | ACTIVE |
| subnets | 42b672ae-8d51-4a18-a028-ddae7859ec4c |
| tenant_id | 1bde0a49d2ff44ffb44e6339a8cefe3a |
+---------------------------+--------------------------------------+
```

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resource "openstack_compute_keypair_v2" "terraform" {
name = "terraform"
public_key = "${file("${var.ssh_key_file}.pub")}"
}
resource "openstack_networking_network_v2" "terraform" {
name = "terraform"
admin_state_up = "true"
}
resource "openstack_networking_subnet_v2" "terraform" {
name = "terraform"
network_id = "${openstack_networking_network_v2.terraform.id}"
cidr = "10.0.0.0/24"
ip_version = 4
dns_nameservers = ["8.8.8.8","8.8.4.4"]
}
resource "openstack_networking_router_v2" "terraform" {
name = "terraform"
admin_state_up = "true"
external_gateway = "${var.external_gateway}"
}
resource "openstack_networking_router_interface_v2" "terraform" {
router_id = "${openstack_networking_router_v2.terraform.id}"
subnet_id = "${openstack_networking_subnet_v2.terraform.id}"
}
resource "openstack_compute_secgroup_v2" "terraform" {
name = "terraform"
description = "Security group for the Terraform example instances"
rule {
from_port = 22
to_port = 22
ip_protocol = "tcp"
cidr = "0.0.0.0/0"
}
rule {
from_port = 80
to_port = 80
ip_protocol = "tcp"
cidr = "0.0.0.0/0"
}
rule {
from_port = -1
to_port = -1
ip_protocol = "icmp"
cidr = "0.0.0.0/0"
}
}
resource "openstack_compute_floatingip_v2" "terraform" {
pool = "${var.pool}"
depends_on = ["openstack_networking_router_interface_v2.terraform"]
}
resource "openstack_compute_instance_v2" "terraform" {
name = "terraform"
image_name = "${var.image}"
flavor_name = "${var.flavor}"
key_pair = "${openstack_compute_keypair_v2.terraform.name}"
security_groups = [ "${openstack_compute_secgroup_v2.terraform.name}" ]
floating_ip = "${openstack_compute_floatingip_v2.terraform.address}"
network {
uuid = "${openstack_networking_network_v2.terraform.id}"
}
provisioner "remote-exec" {
connection {
user = "${var.ssh_user_name}"
key_file = "${var.ssh_key_file}"
}
inline = [
"sudo apt-get -y update",
"sudo apt-get -y install nginx",
"sudo service nginx start"
]
}
}

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#!/usr/bin/env bash
export OS_AUTH_URL=http://KEYSTONE.ENDPOINT.URL:5000/v2.0
export OS_TENANT_NAME=YOUR_TENANT_NAME
export OS_USERNAME=YOUR_USERNAME
export OS_PASSWORD=YOUR_PASSWORD
export OS_REGION_NAME=YOUR_REGION_NAME

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output "address" {
value = "${openstack_compute_floatingip_v2.terraform.address}"
}

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variable "image" {
default = "Ubuntu 14.04"
}
variable "flavor" {
default = "m1.small"
}
variable "ssh_key_file" {
default = "~/.ssh/id_rsa.terraform"
}
variable "ssh_user_name" {
default = "ubuntu"
}
variable "external_gateway" {
}
variable "pool" {
default = "public"
}