Wordpress-on-EKS

Deploy a wordpress on top of EKS on AWS using terraform

Configure AWS CLI

In order for Terraform to run operations on your behalf, you must install and configure the AWS CLI tool.

$ aws configure
AWS Access Key ID [None]: YOUR_AWS_ACCESS_KEY_ID
AWS Secret Access Key [None]: YOUR_AWS_SECRET_ACCESS_KEY
Default region name [None]: YOUR_AWS_REGION
Default output format [None]: json

Set up and initialize your Terraform workspace

Here, you will find 5 files used to provision a VPC, security groups, and an EKS cluster.

1. vpc.tf - provisions a VPC, subnets, and availability zones using the AWS VPC Module. A new VPC is created for this tutorial so it doesn't impact your existing cloud environment and resources.
2. security-groups.tf - provisions the security groups used by the EKS cluster.
3. eks-cluster.tf - provisions all the resources (AutoScaling Groups, etc) required to set up an EKS cluster in the private subnets and bastion servers to access the cluster using the AWS EKS Module.
4. outputs.tf - defines the output configuration.
5. versions.tf - sets the Terraform version to at least 0.12. It also sets versions for the providers used in this sample.

Initialize Terraform workspace

$ cd eks-cluster
$ terraform init

Provision the EKS cluster

In your initialized directory, run terraform apply and review the planned actions. Your terminal output should indicate the plan is running and what resources will be created

$ terraform apply

This terraform apply will provision a total of 53 resources (VPC, Security Groups, AutoScaling Groups, EKS Cluster, etc...). Confirm the apply with a yes.

This process should take approximately 10 minutes. Upon successful application, your terminal prints the outputs defined in outputs.tf

Configure kubectl with the Amazon EKS Cluster

Run the following command to retrieve the access credentials for your cluster and automatically configure kubectl.

$ aws eks --region $(terraform output region) update-kubeconfig --name $(terraform output cluster_name)

Provision RDS Instance

Change directory to rds and Create RDS to use by wordpress

$ cd rds
$ terraform init
$ terraform apply

Deploy wordpress using helm

In this step, we use terraform and helm-release to deploy a wordpress on top of the EKS cluster. change directory to wordpress-helm and deploy wordpress

$ cd wordpress-helm

required values have been set in helm chart in case of needed it can be changed inwordpress-chart/values.yaml

RDS instance variable that needs to be used by wordpress app will be passed by helm-release.

$ terraform init
$ terraform apply

The wordpress application will be accessible by loadbalancer ip address that show in outputs.tf