How to Deploy JHipster Microservices on Amazon EKS Using Terraform and Kubernetes

• kdash

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  A simple and fast dashboard for Kubernetes

  

[Optional] KDash

• okta-jhipster-k8s-eks-microservices-example

  1 6 0.6 Java

  Example for Java Microservices on Amazon EKS Using Terraform and Kubernetes

  

You need a microservice stack to deploy to the cluster. I'm using a microservice stack scaffolded for demo purposes using JHipster. You can use another microservice stack if you want. If you prefer using the same application as in this demo, then you can either scaffold it using JHipster JDL or clone the sample repository from GitHub.

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• terraform-aws-vpc

  23 2,868 7.2 HCL

  Terraform module to create AWS VPC resources 🇺🇦

  

Now let us move on to the important part of the tutorial. Creating an EKS cluster in AWS is not as straightforward as in Google Cloud Platform (GCP). You need to also create a lot more resources for everything to work correctly without surprises. You will be using a bunch of Terraform providers to help with this, and you will also use some prebuilt Terraform modules like AWS VPC Terraform module and Amazon EKS Blueprints for Terraform to reduce the amount of boilerplate you need to write.

• terraform-aws-eks-blueprints

  39 2,496 9.1 HCL

  Configure and deploy complete EKS clusters.

  

Now let us move on to the important part of the tutorial. Creating an EKS cluster in AWS is not as straightforward as in Google Cloud Platform (GCP). You need to also create a lot more resources for everything to work correctly without surprises. You will be using a bunch of Terraform providers to help with this, and you will also use some prebuilt Terraform modules like AWS VPC Terraform module and Amazon EKS Blueprints for Terraform to reduce the amount of boilerplate you need to write.

• metrics-server

  40 5,419 8.6 Go

  Scalable and efficient source of container resource metrics for Kubernetes built-in autoscaling pipelines.

  

and Metrics Server, and Cluster Autoscaler for scaling your workloads.

• sealed-secrets

  71 7,120 9.2 Go

  A Kubernetes controller and tool for one-way encrypted Secrets

  

If you have noticed, you are setting secrets in plain text on the application-configmap.yml file, which is not ideal and is not a best practice for security. For the specific JHipster application, you can use the encrypt functionality provided by the JHipster Registry to encrypt the secrets. See Encrypt Your Secrets with Spring Cloud Config to learn how to do this. But that would also rely on a base64 encoded encryption key added as a Kubernetes Secret, which still can be decoded. The best way to do this would be to use AWS Secrets Manager, an external service like HashiCorp Vault, or Sealed Secrets. To learn more about these methods see Encrypt Your Kubernetes Secrets.

• jib

  46 13,377 8.0 Java

  🏗 Build container images for your Java applications.

  

You need to build Docker images for each app. This is specific to the JHipster application used in this tutorial which uses Jib to build the images. Make sure you are logged into Docker using docker login. Navigate to each app folder (store, invoice, product) and run the following command:

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• terraform

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  Terraform enables you to safely and predictably create, change, and improve infrastructure. It is a source-available tool that codifies APIs into declarative configuration files that can be shared amongst team members, treated as code, edited, reviewed, and versioned.

  

If you want to run a microservice stack on EKS, you will need to spend some extra time and effort setting it up and managing it. This is where infrastructure as code (IaC) tools like Terraform come in handy.

• JHipster

  63 21,221 10.0 Java

  JHipster, much like Spring initializr, is a generator to create a boilerplate backend application, but also with an integrated front end implementation in React, Vue or Angular. In their own words, it "Is a development platform to quickly generate, develop, & deploy modern web applications & microservice architectures."

  

You need a microservice stack to deploy to the cluster. I'm using a microservice stack scaffolded for demo purposes using JHipster. You can use another microservice stack if you want. If you prefer using the same application as in this demo, then you can either scaffold it using JHipster JDL or clone the sample repository from GitHub.

• aws-cloudformation-coverage-roadmap

  143 1,089 1.7

  The AWS CloudFormation Public Coverage Roadmap

  

At this point, the first question that might pop up in your mind would be, "Why not use CloudFormation?". It's a good question; after all, CloudFormation is built by AWS and hence sounds like an excellent solution to manage AWS resources. But anyone who has tried both CloudFormation and Terraform will probably tell you to forget that CloudFormation even exists. I think CloudFormation is far more complex and less developer-friendly than Terraform. You also need to write a lot more boilerplate with CloudFormation in YAML or JSON. Yikes! And most importantly, Terraform is far more powerful and flexible than CloudFormation. It's cross-platform, which means you can take care of all your infrastructure management needs on any platform with one tool.

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