Terraform-test

Testing terraform config with kubernetes provider.

Dependencies

• terraform
• kubernetes (kubeadm, kubelet, kubectl)
• kind

Setup

Kubes config

• Create kubernetes cluster with provided or custom config

$ kind create cluster --name terraform-test --config kind-config.yaml

• point kubectl to cluster

$ kubectl cluster-info --context kind-terraform-test

Provider config

• Configure provider in terraform.tfvars, taking variables from

$ kubectl config view --minify --flatten --context=kind-terraform-test

host                   = "https://127.0.0.1:32768"  /* clusters.cluster.server */
client_certificate     = "LS0tLS1CRUdJTiB..."       /* users.user.client-certificate */
client_key             = "LS0tLS1CRUdJTiB..."       /* users.user.client-key */
cluster_ca_certificate = "LS0tLS1CRUdJTiB..."       /* clusters.cluster. certificate-authority-data */

Initialize terraform

$ terraform init

Check for running services

$ kubectl get services

NAME            TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)        AGE
kubernetes      ClusterIP   10.96.0.1       <none>        443/TCP        48m
nginx-example   NodePort    10.96.209.138   <none>        80:30201/TCP   3m47s

Server scaling

Adding more replicas

• Change kubernetes.tf replicas variable: replicas = 4
• Apply changes

$ terraform apply