An example k0s Kubernetes cluster in vSphere Debian Virtual Machines using terraform.
Create and install the base Debian 12 vagrant box.
Install Terraform:
wget https://releases.hashicorp.com/terraform/1.5.7/terraform_1.5.7_linux_amd64.zip
unzip terraform_1.5.7_linux_amd64.zip
sudo install terraform /usr/local/bin
rm terraform terraform_*_linux_amd64.zipSave your environment details as a script that sets the terraform variables from environment variables, e.g.:
cat >secrets.sh <<'EOF'
export TF_VAR_prefix='k0s'
export TF_VAR_vsphere_user='[email protected]'
export TF_VAR_vsphere_password='password'
export TF_VAR_vsphere_server='vsphere.local'
export TF_VAR_vsphere_datacenter='Datacenter'
export TF_VAR_vsphere_compute_cluster='Cluster'
export TF_VAR_vsphere_datastore='Datastore'
export TF_VAR_vsphere_network='VM Network'
export TF_VAR_vsphere_folder='k0s'
export TF_VAR_vsphere_k0s_template='vagrant-templates/debian-12-amd64'
export GOVC_INSECURE='1'
export GOVC_URL="https://$TF_VAR_vsphere_server/sdk"
export GOVC_USERNAME="$TF_VAR_vsphere_user"
export GOVC_PASSWORD="$TF_VAR_vsphere_password"
EOFNB You could also add these variables definitions into the terraform.tfvars file, but I find the environment variables more versatile as they can also be used from other tools, like govc.
Create the infrastructure:
rm -f ~/.ssh/known_hosts*
terraform init
TF_LOG=TRACE TF_LOG_PATH=terraform-plan.log terraform plan -out=tfplan
TF_LOG=TRACE TF_LOG_PATH=terraform-apply.log time terraform apply tfplanShow information about kubernetes:
terraform output --raw kubeconfig >kubeconfig.yml
export KUBECONFIG="$PWD/kubeconfig.yml"
kubectl version --output yaml
kubectl cluster-info
kubectl get nodes -o wide
kubectl api-versions
kubectl api-resources -o wide
kubectl get namespaces
kubectl get all --all-namespaces -o wide
kubectl get events --all-namespaces --sort-by=.metadata.creationTimestamp
kubectl get charts --all-namespaces # aka charts.helm.k0sproject.ioDestroy the infrastructure:
time terraform destroy -auto-approve
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