c12s-kubespray/contrib/terraform/vsphere
Jakub Krzywda 0a0156c946
Vsphere (#7306)
* Add terraform scripts for vSphere

* Fixup: Add terraform scripts for vSphere

* Add inventory generation

* Use machines var to provide IPs

* Add README file

* Add default.tfvars file

* Fix newlines at the end of files

* Remove master.count and worker.count variables

* Fixup cloud-init formatting

* Fixes after initial review

* Add warning about disabled DHCP

* Fixes after second review

* Add sample-inventory
2021-02-26 04:20:15 -08:00
..
modules/kubernetes-cluster Vsphere (#7306) 2021-02-26 04:20:15 -08:00
sample-inventory Vsphere (#7306) 2021-02-26 04:20:15 -08:00
templates Vsphere (#7306) 2021-02-26 04:20:15 -08:00
default.tfvars Vsphere (#7306) 2021-02-26 04:20:15 -08:00
main.tf Vsphere (#7306) 2021-02-26 04:20:15 -08:00
output.tf Vsphere (#7306) 2021-02-26 04:20:15 -08:00
README.md Vsphere (#7306) 2021-02-26 04:20:15 -08:00
variables.tf Vsphere (#7306) 2021-02-26 04:20:15 -08:00
versions.tf Vsphere (#7306) 2021-02-26 04:20:15 -08:00

Kubernetes on Exoscale with Terraform

Provision a Kubernetes cluster on vSphere using Terraform and Kubespray.

Overview

The setup looks like following.

   Kubernetes cluster
+-----------------------+
|   +--------------+    |
|   | +--------------+  |
|   | |              |  |
|   | | Master/etcd  |  |
|   | | node(s)      |  |
|   +-+              |  |
|     +--------------+  |
|           ^           |
|           |           |
|           v           |
|   +--------------+    |
|   | +--------------+  |
|   | |              |  |
|   | |    Worker    |  |
|   | |    node(s)   |  |
|   +-+              |  |
|     +--------------+  |
+-----------------------+

Warning

This setup assumes that the DHCP is disabled in the vSphere cluster and IP addresses have to be provided in the configuration file.

Requirements

  • Terraform 0.13.0 or newer

0.12 also works if you modify the provider block to include version and remove all versions.tf files

Quickstart

NOTE: Assumes you are at the root of the kubespray repo

Copy the sample inventory for your cluster and copy the default terraform variables.

CLUSTER=my-vsphere-cluster
cp -r inventory/sample inventory/$CLUSTER
cp contrib/terraform/vsphere/default.tfvars inventory/$CLUSTER/
cd inventory/$CLUSTER

Edit default.tfvars to match your setup. You MUST set values specific for you network and vSphere cluster.

# Ensure $EDITOR points to your favorite editor, e.g., vim, emacs, VS Code, etc.
$EDITOR default.tfvars

For authentication in your vSphere cluster you can use the environment variables.

export TF_VAR_vsphere_user=username
export TF_VAR_vsphere_password=password

Run Terraform to create the infrastructure.

terraform init ../../contrib/terraform/vsphere
terraform apply \
    -var-file default.tfvars \
    -state=tfstate-$CLUSTER.tfstate \
    ../../contrib/terraform/vsphere

You should now have a inventory file named inventory.ini that you can use with kubespray. You can now copy your inventory file and use it with kubespray to set up a cluster. You can type terraform output to find out the IP addresses of the nodes.

It is a good idea to check that you have basic SSH connectivity to the nodes. You can do that by:

ansible -i inventory.ini -m ping all

Example to use this with the default sample inventory:

ansible-playbook -i inventory.ini ../../cluster.yml -b -v

Variables

Required

  • machines: Machines to provision. Key of this object will be used as the name of the machine
    • node_type: The role of this node (master|worker)
    • ip: The IP address with the netmask (CIDR notation)
  • gateway: The IP address of the network gateway
  • ssh_public_keys: List of public SSH keys to install on all machines
  • vsphere_datacenter: The identifier of vSphere data center
  • vsphere_compute_cluster: The identifier of vSphere compute cluster
  • vsphere_datastore: The identifier of vSphere data store
  • vsphere_server: The address of vSphere server
  • vsphere_hostname: The IP address of vSphere hostname
  • template_name: The name of a base image (the image has to be uploaded to vSphere beforehand)

Optional

  • prefix: Prefix to use for all resources, required to be unique for all clusters in the same project (Defaults to default)
  • dns_primary: The IP address of primary DNS server (Defaults to 8.8.4.4)
  • dns_secondary:The IP address of secondary DNS server (Defaults to 8.8.8.8)

An example variables file can be found default.tfvars