- Git
- Ansible >= v2.6
- Jinja >= 2.9.6
- Python netaddr
- Terraform
- Internet connection on the client machine to download Kubespray.
- Internet connection on the Kubernetes nodes to download the Kubernetes binaries.
- vSphere environment with a vCenter. An enterprise plus license is needed if you would like to configure anti-affinity between the Kubernetes master nodes.
- A Linux vSphere template. If linked clone is used, the template needs to have one and only one snapshot(due to a current bug in the provider, the template also need to be just a power off VM and not an actual vSphere template).
- Ubuntu LTS 16.04 (requirements: open-vm-tools package)
- Ubuntu LTS 18.04 (requirements: open-vm-tools package)
- CentOS 7 (requirements: open-vm-tools package, perl package)
- Debian 9 (requirements: VMware tools, vSphere VM OS configuration set to Ubuntu x64, net-tools package)
- RHEL 7 (requirements: VMware tools, net-tools package)
RHEL 7 | CentOS 7 | Ubuntu LTS 18.04 | Ubuntu LTS 16.04 | Debian 9 | |
---|---|---|---|---|---|
Flannel | ✔️ | ✔️ | ✔️ | ✔️ | ✔️ |
Weave | ✔️ | ✔️ | ✔️ | ✔️ | ✔️ |
Calico | ✔️ | ✔️ | ✔️ | ✔️ | ✔️ |
Cilium | ❌ | ❌ | ✔️ | ❌ | ✔️ |
Canal | ✔️ | ✔️ | ✔️ | ✔️ | ✔️ |
All the steps to use this Terraform script are described in details here: https://blog.inkubate.io/install-and-manage-automatically-a-kubernetes-cluster-on-vmware-vsphere-with-terraform-and-kubespray/
$ cd terraform-vsphere-kubespray
$ vim terraform.tfvars
$ terraform init
$ terraform plan
$ terraform apply
Add one or several worker nodes to the k8s_worker_ips list:
$ vim terraform.tfvars
Execute the terraform script to add the worker nodes:
$ terraform apply -var 'action=add_worker'
Remove one or several worker nodes to the k8s_worker_ips list:
$ vim terraform.tfvars
Execute the terraform script to remove the worker nodes:
$ terraform apply -var 'action=remove_worker'
Modify the k8s_version variable:
$ vim terraform.tfvars
Execute the terraform script to upgrade Kubernetes:
$ terraform apply -var 'action=upgrade'