✨ Deploy GKE private cluster using terraform and expose an echo server

🖱️ For Details and components explanation read A gentle introduction to GKE private cluster deployment

🏗️ For production-grade deployments see the official Terraform Kubernetes Engine Module

• Prerequisites

  • terraform
  • kubectl
  • gcloud
  • tfswitch - optional

• Enable the following GCP APIs using the GCP console [1]

  • Open GCP console -> APIs & Services -> enable APIs and services
  • Enable:
    • Compute Engine API
    • Kubernetes Engine API

• Clone the repo gke-basic-cluster-deployment

• Compile the input variables:

      $ cp iac/variables.tfvars.example iac/variables.tfvars
      $ vi iac/variables.tfvars # replace with your data

• Deploy the cluster:

  • Replace\set the variables with your data

      # configure gcloud to the desired project
      $ gcloud config set project $PROJECT_ID
  
      # configure terraform
      $ cd iac
      $ tfswitch
      $ terraform init
  
      # deploy the GKE pre-requisites
      $ terraform plan -out out.plan -var-file="./variables.tfvars" -var  deploy_cluster=false
      $ terraform apply out.plan
      
      # deploy GKE - can take more than 20 minutes
      $ terraform plan -out out.plan -var-file="./variables.tfvars" -var deploy_cluster=true
      $ terraform apply out.plan

• Deploy the services into k8s

  • Replace\set the variables with your data

      # set kubectl context
      $ gcloud container clusters get-credentials gkedeploy-cluster --zone $PROJECT_REGION --project $PROJECT_ID
  
      # create common resources
      $ kubectl apply -f k8s/common
  
      # deploy the server
      $ kubectl apply -f k8s/gechoserver/
  
      # wait that the ADDRESS will be displayed - can take more than 10 minutes
      $ kubectl -n dev get ingress -o wide
      NAME          CLASS    HOSTS   ADDRESS          PORTS   AGE
      gechoserver   <none>   *       34.120.114.207   80      67s
  
      # query the server from internet - can take  more than 10 minutes
      # replace "34.120.114.207" with your address:
      $ curl -XPOST -v http://34.120.114.207/ -d "foo=bar"
  
      # ~ Congratulation, your server on GKE is up and running! ~

• Destroy the cluster:

      $ cd iac
      $ terraform destroy -auto-approve -var-file="./variables.tfvars" -var deploy_cluster=true