Yet Another WordPress…

Task : Deploy the WordPress application on Kubernetes and AWS using Terraform

Kubernetes ?

Kubernetes is a portable, extensible, open-source platform for managing containerized workloads and services, that facilitates both declarative configuration and automation. It has a large, rapidly growing ecosystem. Kubernetes services, support, and tools are widely available.

AWS RDS ?

Amazon Relational Database Service (Amazon RDS) makes it easy to set up, operate, and scale a relational database in the cloud. It provides cost-efficient and resizable capacity while automating time-consuming administration tasks such as hardware provisioning, database setup, patching and backups. It frees you to focus on your applications so you can give them the fast performance, high availability, security and compatibility they need.

First we’ll deploy WordPress on our local Kubernetes Cluster ( Minikube ):

provider "kubernetes" {
config_context_cluster = "minikube"
}
resource "null_resource" "start_minikube"{
provisioner "local-exec" {
command = "minikube start"
}
}
resource "kubernetes_deployment" "wordpress" {
metadata {
name= "wordpress"
}
spec {
replicas = 1
selector {
match_labels = {
env      = "frontend"
region   = "IN"
app      = "wordpress-kube"
}
match_expressions {
key      = "env"
operator = "In"
values   = ["frontend", "webserver"]
}
}
template {
metadata {
labels = {
env    = "frontend"
region = "IN"
app    = "wordpress-kube"
}
}
spec {
container {
image = "wordpress:5.1.1-php7.3-apache"
name  = "wordpress-kube"
}
}
}
}
}
resource "kubernetes_service" "kube_" {
metadata {
name = "service"
}
spec {
selector = {
app = kubernetes_deployment.wordpress.spec.0.template.0.metadata[0].labels.app
}
port {
node_port   = 32123
port        = 80
target_port = 80
}
type = "NodePort"
}
}

Second Step will be to create a Relational Database ( Amazon RDS ):

provider "aws" {
profile = "Kaizoku"
region = "ap-south-1"
}
resource "aws_security_group" "SG_DB" {
name        = "Tf_SG_MySql"
description = "allows inbound port 3306"
ingress {
from_port   = 3306
to_port     = 3306
protocol    = "tcp"
cidr_blocks = ["0.0.0.0/0"]
}
egress {
from_port       = 0
to_port         = 0
protocol        = "-1"
cidr_blocks     = ["0.0.0.0/0"]
}
tags = {
Name = "SG_DB"
}
}
resource "aws_db_instance" "RDS" {
tags = {
Name = "Tf_DB"
}
name                   = "wordpress_db"
username               = "Kaizoku"
password               = "redhatpass"
allocated_storage      = 25
vpc_security_group_ids = [aws_security_group.SG_DB.id]
storage_type           = "gp2"
identifier             = "mysql"
engine                 = "mysql"
engine_version         = "5.7"
instance_class         = "db.t2.micro"
publicly_accessible    = true
port                   = 3306
parameter_group_name   = "default.mysql5.7"
skip_final_snapshot    = true
}
output "display_dns" {
value = aws_db_instance.RDS.address
}

Note: The above 2 code snippets are independent of each other, they can either be stored in separate files and executed separately or both can be stored in same file and executed together. I’m using a single file to execute both.

For Execution : -

• Initialize and install the required plugins

terraform init

• Plans

terraform plan

• Validate ( Checks for error )

terraform validate

• Create the Infrastructure

terraform apply --auto-approve

Now our Infrastructure is set up:

Use the above highlighted IP and Port Number to access WordPress.

http:// 192.168.99.100:32123

Note: Copy the End Point URL from RDS (you can avoid doing it by copying it from the terminal, as our code displays it as an output after the successful execution of apply command )and paste it in the Database Host Field.

Awesome !! Run the installation and our WordPress Site is ready already!

Just complete a few small steps and…

Use the above set up for as long as you want, afterwards to remove the complete set up just run

terraform destroy --auto-approve

For Source Code -> https://github.com/pewxh/aws-with-terraform/blob/main/wordpress_kubernetes/main.tf

Thank you, Hope you like it :)