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Merge pull request #66 from Lemoncode/feat/iac
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‎.gitignore

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# CDK8s demos
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*/08-ckd8s/00-hello-world-code/
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# Private view
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.aws/
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lab/
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private.readme.md

‎04-cloud/01-eks/06-autoscalling-our-applications/00-install-kube-ops-view.md

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This will display a line similar to Kube-ops-view URL = http://<URL_PREFIX_ELB>.amazonaws.com Opening the URL in your browser will provide the current state of our cluster.
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> Reference: https://kubernetes-operational-view.readthedocs.io/en/latest/

‎05-iac/00-terraform/.start-app/main.tf

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# PROVIDERS
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provider "aws" {
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access_key = "AWS_ACCESS_KEY"
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secret_key = "AWS_SECRET_KEY"
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region = "eu-west-3"
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}
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# DATA
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data "aws_ssm_parameter" "ami" {
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name = "/aws/service/ami-amazon-linux-latest/amzn2-ami-hvm-x86_64-gp2"
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}
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# RESOURCES
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# NETWORKING #
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resource "aws_vpc" "vpc" {
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cidr_block = "10.0.0.0/16"
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enable_dns_hostnames = "true"
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}
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resource "aws_internet_gateway" "igw" {
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vpc_id = aws_vpc.vpc.id
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}
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resource "aws_subnet" "subnet1" {
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cidr_block = "10.0.0.0/24"
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vpc_id = aws_vpc.vpc.id
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map_public_ip_on_launch = "true"
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}
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# ROUTING #
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resource "aws_route_table" "rtb" {
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vpc_id = aws_vpc.vpc.id
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route {
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cidr_block = "0.0.0.0/0"
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gateway_id = aws_internet_gateway.igw.id
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}
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}
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resource "aws_route_table_association" "rta-subnet1" {
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subnet_id = aws_subnet.subnet1.id
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route_table_id = aws_route_table.rtb.id
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}
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# SECURITY GROUPS #
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resource "aws_security_group" "nginx-sg" {
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name = "nginx_sg"
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vpc_id = aws_vpc.vpc.id
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# HTTP access from anywhere
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ingress {
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from_port = 80
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to_port = 80
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protocol = "tcp"
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cidr_blocks = ["0.0.0.0/0"]
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}
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# outbound internet access
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egress {
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from_port = 0
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to_port = 0
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protocol = "-1"
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cidr_blocks = ["0.0.0.0/0"]
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}
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}
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# INSTANCES #
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resource "aws_instance" "nginx1" {
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ami = nonsensitive(data.aws_ssm_parameter.ami.value)
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instance_type = "t2.micro"
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subnet_id = aws_subnet.subnet1.id
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vpc_security_group_ids = [aws_security_group.nginx-sg.id]
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user_data = <<EOF
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#! /bin/bash
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sudo amazon-linux-extras install -y nginx1
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sudo service nginx start
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sudo rm /usr/share/nginx/html/index.html
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echo '<html><head><title>Lemon Land Server</title></head><body style=\"background-color:#1F778D\"><p style=\"text-align: center;\"><span style=\"color:#FFFFFF;\"><span style=\"font-size:28px;\">Welcome to &#127819; land</span></span></p></body></html>' | sudo tee /usr/share/nginx/html/index.html
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EOF
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}

‎05-iac/00-terraform/.website/fruits.png

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‎05-iac/00-terraform/.website/index.html

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<html>
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<head>
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<title>LemonLand Test Site</title>
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</head>
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<body style="background-color:#FFFFFF">
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<p style="text-align: center;">
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<img src="fruits.png" alt="YEAH!" style="margin-left:auto;margin-right:auto">
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</p>
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</body>
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</html>

‎05-iac/00-terraform/01-setup/readme.md

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## Instalando Terraform
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La instalación de Terraform es un simple ejecutable que añadiremos a nuestro path. Podemos usar los gestores de paquetes de nuestro sistema operativo para instalarlo.
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## Instalación Manual
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Este paso es común a todos los sistemas operativos.
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Descargar el paquete adecuado para nuestro sistema operativo en [este enlace](https://www.terraform.io/downloads).
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### Instalación Manual Mac o Linux
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Una vez descargado lo descomprimimos, y lo movemos al directorio de ejectutables.
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```bash
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mv ~/Downloads/terraform /usr/local/bin/
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```
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Para confirmar la instalación, simplemente ejecutar:
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```bash
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terraform -help
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```
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### Instalación Manual Windows
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Una vez descargado lo descomprimimos y lo ubicamos en una carpeta fácilmente reconocible por ejemplo `C:\terraform`.
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Para editar el `PATH`, seguiremos los siguientes pasos:
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1. Ir a `Control panel` --> `System` --> `System settings` --> `Environment Variables`
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2. Buscar `PATH`
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3. Pulsar `edit` y modificarlo de forma adecuada
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4. Asegurar que hemos incluido `;` --> `c:\path;c:\path2`
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## Referencias
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[Terraform Downloads](https://www.terraform.io/downloads)
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[Where can I set up path xxxx.exe on Windows?](https://stackoverflow.com/questions/1618280/where-can-i-set-path-to-make-exe-on-windows)

‎05-iac/00-terraform/02-introduccion/readme.md

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# Introducción
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## Infraestructura como código
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> Proveer infraestructura a través del software para conseguir despliegues consistentes y predecibles.
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## Conceptos fundamentales
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* Definido en Código
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* Almacenamiento en control de versiones
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* Declarativo o imperativo
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* Idempotente y consistente
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* Push o Pull
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## Declarativo vs Imperativo
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```ini
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# Make me a campero
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get mollete
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get ham
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get cheese
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get tomato
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get lettuce
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get mayonnaise
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put ham in mollete
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put cheese on ham
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put lettuce on cheese
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put tomato on lettuce
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```
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```ini
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# Make me a campero
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get mollete
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get ham
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get cheese
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get tomato
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get lettuce
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get mayonnaise
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put ham in mollete
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put cheese on ham
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put lettuce on cheese
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put tomato on lettuce
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put mayonaise on tomato
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```
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```ini
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# Make me a campero
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food campero "classic-campero" {
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ingridients = [
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"ham", "cheese", "tomato", "lettuce", "mayonnaise"
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]
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}
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```
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put mayonaise on tomato
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```
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```ini
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# Make me a campero
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food campero "classic-campero" {
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ingridients = [
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"ham", "cheese", "tomato", "lettuce", "mayonnaise"
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]
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}
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```
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> Terraform es un ejemplo de aproximación declarativa para desarrollar Infraestructure as Code.
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## Idempotente y Consistente
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* Mi amigo: Hazme un Campero
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* Mi respuesta Toma tu Campero
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En un mundo **idempotente**, si **mi amigo pregunta de nuevo** por el `campero`
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* Mi amigo: Hazme un Campero
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* Mi respuesta Toma tu Campero
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No te voy a hacer otro porque ya tienes uno.
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> Terrafom intenta ser idempotente en el sentido de que si n has cambiado nada en tu código y lo aplicas de nuevo al mismo entorno, nada cambiará en el entorno porque tu código coincide con la realidad de la infraestructura que existe.
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## Push or Pull
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* ¿Pushing o Pulling al entorno?
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* Terraform es de tipo PUSH
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## Beneficios de la Infraestructura como Código
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* Despliegues automatizados
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* Proceso repetible
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* Entornos consistentes
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* Componentes reusables
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* Arquitectura documentada

‎05-iac/00-terraform/03-desplegando-config-base/01-demo.md

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# Desplegando la configuración base
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## AWS account
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Crear una nueva cuenta AWS
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## Pasos
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### Paso 1. Crear directory de trabajo
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Creamos los nuevos drirectorios `lab/lc_web_app` y dentro añadimo el fichero `main.tf`
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```bash
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mkdir -p lab/lc_web_app
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cp ./.start-app/main.tf ./lab/lc_web_app
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```
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Cambiamos el directorio de trabajo a `lab/lc_web_app`
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```bash
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cd ./lab/lc_web_app
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```
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### Paso 2. Actualizamos las crednciales
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Actualizar `access_key` y `secret_key`
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```diff
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provider "aws" {
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+ access_key = "ACCESS_KEY"
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+ secret_key = "SECRET_KEY"
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region = "eu-west-3"
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}
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```
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### Paso 3. Comenzar la inicialización
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```bash
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terraform init
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```
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Obtendremos un output similar a este:
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```
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Initializing the backend...
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Initializing provider plugins...
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- Finding latest version of hashicorp/aws...
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- Installing hashicorp/aws v3.70.0...
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- Installed hashicorp/aws v3.70.0 (signed by HashiCorp)
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Terraform has created a lock file .terraform.lock.hcl to record the provider
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selections it made above. Include this file in your version control repository
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so that Terraform can guarantee to make the same selections by default when
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you run "terraform init" in the future.
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Terraform has been successfully initialized!
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You may now begin working with Terraform. Try running "terraform plan" to see
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any changes that are required for your infrastructure. All Terraform commands
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should now work.
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If you ever set or change modules or backend configuration for Terraform,
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rerun this command to reinitialize your working directory. If you forget, other
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commands will detect it and remind you to do so if necessary.
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```
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### Paso 4. Obtener un Plan
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Ahora que nuestra configuración ha sido inicializada, podemos obtener un plan:
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```bash
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terraform plan -out d1.tfplan
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```
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> Con este comando, estamos indicando que queremos el `plan` volcado sobre el fichero `d1.tfpplan`
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Terraform nos indica las acciones que va a relizar.
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```
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Plan: 7 to add, 0 to change, 0 to destroy.
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──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
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Saved the plan to: d1.tfplan
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To perform exactly these actions, run the following command to apply:
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terraform apply "d1.tfplan"
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```
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### Paso 5. Aplica el Plan
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```bash
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terraform apply "d1.tfplan"
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```
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Si aplicamos este comando, sin alimentar un plan, nos mostrarán un diálogo de confirmación de plan previo.
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Después de unos minutos el despliegue finaliza, podemos acceder a la consola de AWS
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## Clean Up
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```bash
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terraform destroy
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```

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