Presentación empleada en el primer MeetUp AWS del grupo de usuarios de Valencia. Infraestructura como código empleando Terraform. Se muestra las principales características de esta tecnología que nos permite ser más ágiles y rápidos desplegando nuestras plataformas en AWS.

1. Infraestructura como código
Terraform

2. Victor Adsuar - Arquitecto Cloud
victor@victorasuar.com
https://victoradsuar.com
twitter: @victoradsuar
Me presento

3. Bienvenidos a la gestión de
infraestructura como código
¿Qué es Terraform?

4. Producto Open Source de Hashicorp

5. - Open Source (Mozilla Public License 2.0)
- Sencillo de usar. (HCL)
- Compatible con plataformas de
virtualización y nube
- Planes de ejecución para su versionado
- Gráfico dependencias
Características de Terraform:

6. - Linux 32 y 64 bits, and ARM.
- Mac Os X, 32 y 64 bits.
- FreeBSD 32 y 64 bits.
- OpenBSD 32 y 64 bits.
- Illumos Distributions 64 bits
- Windows 32 y 64 bits.
¿Dónde podemos instalar Terraform?

7. - Linux 32 y 64 bits, and ARM.
- Mac Os X, 32 y 64 bits.
- FreeBSD 32 y 64 bits.
- OpenBSD 32 y 64 bits.
- Illumos Distributions 64 bits
- Windows 32 y 64 bits.
¿Dónde podemos instalar Terraform?

8. Instalación Linux
$ wget https://releases.hashicorp.com/terraform/0.10.0/terraform_0.10.0_linux_amd64.zip
$ unzip https://releases.hashicorp.com/terraform/0.10.0/terraform_0.10.0_linux_amd64.zip
$ sudo mv terraform /usr/local/bin
$ chown -R root:root /usr/local/bin/terraform
Instalación Windows
C:> MKDIR terraform
C:> CD terraform
https://releases.hashicorp.com/terraform/0.10.0/terraform_0.10.0_windows_amd64.zip
Add Path $env:Path += ";C:terraform"
Instalación Mac
$ brew install terraform

9. Comprobar instalación
$ terraform version
Terraform v0.10.0
$ terraform help
terraform help
Usage: terraform [--version] [--help] <command> [args]
Common commands:
apply Builds or changes infrastructure
console Interactive console for Terraform interpolations
destroy Destroy Terraform-managed infrastructure
env Workspace management
fmt Rewrites config files to canonical format
get Download and install modules for the configuration
graph Create a visual graph of Terraform resources
import Import existing infrastructure into Terraform
init Initialize a Terraform working directory
output Read an output from a state file
plan Generate and show an execution plan
providers Prints a tree of the providers used in the configuration
push Upload this Terraform module to Atlas to run
refresh Update local state file against real resources
show Inspect Terraform state or plan
taint Manually mark a resource for recreation
untaint Manually unmark a resource as tainted
validate Validates the Terraform files
version Prints the Terraform version
workspace Workspace management
All other commands:
debug Debug output management (experimental)
force-unlock Manually unlock the terraform state
state Advanced state management

10. Variables
Modules
Resources
Output
state
Terraform State

11. /* This is a multi-line comment. This is a multi-line comment. This is a multi-line comment.
This is a multi-line comment. This is a multi-line comment. This is a multi-line comment. */
provider "aws" {
region = "eu-west-1"
}
# This is a single-line comment.
resource "aws_instance" "base" {
ami = "ami-ebd02392"
instance_type = "t2.micro"
}
Ejemplo de ec2.tf
Los parámetros no especificados
cogerá los que AWS tenga
definidos por defecto.

12. Crear infraestructura
Iniciar Terraform
$ terraform init
Plan
$ terraform plan
$ terraform plan -out base-`date +'%s'`.plan
Crear
$ terraform apply
$ terraform apply base-1503252130.plan
Comprobar
$ terraform show
$ terraform state list

13. /* This is a multi-line comment. This is a multi-line comment. This is a multi-line comment.
This is a multi-line comment. This is a multi-line comment. This is a multi-line comment. */
provider "aws" {
region = "eu-west-1"
}
# This is a single-line comment.
resource "aws_instance" "base" {
ami = "ami-ebd02392"
instance_type = "t2.micro"
}
resource "aws_eip" "base" {
instance = "${aws_instance.base.id}"
}
Las variables, funciones y atributos
de recursos se referencian
por $ { }

14. Modificar y Destruir Infraestructura
Modificación
$terraform apply
+ Recurso será añadido
- Recurso será eliminado
-/+ Recurso será eliminado y creado de nuevo
~ Recurso será modificado
Destrucción
$ terraform destroy

15. Tipo de variables
Strings
“variable "region" {
description = "The AWS
region."
default = "us-east-1"
}”
Maps
“variable "ami" {
type = "map"
default = {
us-east-1 = "ami-0d729a60"
us-west-1 = "ami-7c4b331c"
}
description = "The AMIs to use."
}”
Lists
“variable "security_group_ids"
{
type = "list"
description = "List of
security group IDs."
default = ["sg-4f713c35",
"sg-4f713c35", "sg-4f713c35"]
}”

16. Carga de variables
Linea de Comando
“terraform plan -var 'access_key=12345 -var
'secret_key=12345”
Desde un fichero (terraform.tfvars)
“access_key = "xyz245"
secret_key = "xyz245"
ami = {
us-east-1 = "ami-0d729a60"
us-west-1 = "ami-7c4b331c"
}”
Variables de Entorno
“TF_VAR_comodin”
$TF_VAR_aws_code = zxy245
Por defecto
“variable "region" {
description = "The AWS region."
default = "eu-west-1"
}”

17. Módulos
Llamada módulo fichero
module "vpc" {
source = "./modules"
name = "WTFVPC"
cidr = "10.0.0.0/16"
}
Llamada módulo internet
module "vpc" {
source = "github.com/wtf/wtf_vpc
. . .
}
Definición módulo
resource "aws_vpc" "vpc_wtf" {
cidr_block = "${var.cidr}"
enable_dns_hostnames =
"${var.enable_dns_hostnames}"
enable_dns_support =
"${var.enable_dns_support}"
tags {
Name = "${var.name}"
}
}

18. Aprovisionamiento de Stack
Infraestructura
Imágen
User-Data
Ansible, Puppet,
Chef, etc...

19. Vamos a desplegar!

20. Muchas gracias