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Vsphere (#7306)

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* 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
This commit is contained in:
Jakub Krzywda
2021-02-26 13:20:15 +01:00
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commit 0a0156c946
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contrib/terraform/vsphere/README.md Normal file
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# Kubernetes on Exoscale with Terraform
Provision a Kubernetes cluster on [vSphere](https://www.vmware.com/se/products/vsphere.html) using Terraform and Kubespray.
## Overview
The setup looks like following.
```text
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.
```bash
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.
```bash
# Ensure $EDITOR points to your favorite editor, e.g., vim, emacs, VS Code, etc.
$EDITOR default.tfvars
```
For authentication in your vSphere cluster you can use the environment variables.
```bash
export TF_VAR_vsphere_user=username
export TF_VAR_vsphere_password=password
```
Run Terraform to create the infrastructure.
```bash
terraform init ../../contrib/terraform/vsphere
terraform apply \
-var-file default.tfvars \
-state=tfstate-$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:
```bash
ansible -i inventory.ini -m ping all
```
Example to use this with the default sample inventory:
```bash
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`