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Kubernetes Example

This example shows how you can spin up a Kubernetes cluster with Terraform using the "gridscale_paas" resource.

Before you run Terraform, you need to set the GRIDSCALE_TOKEN and GRIDSCALE_UUID environment variables to their appropriate values. Take a look at the .envrc file for all variables.

Example

In this example we will provision a cluster with:

  • three worker nodes (max.)

whereas each worker node has

  • 2 cores
  • 4 GB of RAM
  • and 30 GB of storage

Provisioning time varies of course but we can expect to take around 10 minutes to spin up the cluster.

Retrieve kubeconfig

Inside the cluster.tf you can see a defined output. the configured value needs to match the gridscale_k8s resource. In the given example, our gridscale_k8s resource is named mycluster:

resource "gridscale_k8s" "mycluster" {
  # ...
}

So the configured value of our terraform output needs to look like this:

output "kubeconfig" {
  value = gridscale_k8s.mycluster.kubeconfig
}

When you create your cluster terraform will write the kubeconfig now to stdout, if you need to get the kubeconfig after you've deployed your cluster, you can do so by calling:

terraform output kubeconfig

TODO

Missing:

  • Run through a minimum hello world example:
    • create a deployment
    • create a service
  • destroy everything