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Fixes various issues in vSphere Terraform code (#8178)

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* Fixes various issues in vSphere Terraform code

Provided to address various shortcomings and to fix the following
issue in upstream Kubespray:

https://github.com/kubernetes-sigs/kubespray/issues/8176

* Resolves Terraform formatting issues

* Sets default prefix to human-readable name

* Documents new default prefix in README
This commit is contained in:
Lars Larsson 2021-11-12 20:40:29 +01:00 committed by GitHub
parent b5a5478a8a
commit 6eeb4883af
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9 changed files with 87 additions and 53 deletions
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28
contrib/terraform/vsphere/README.md
View file

@ -1,6 +1,6 @@
# Kubernetes on Exoscale with Terraform
# Kubernetes on vSphere with Terraform
Provision a Kubernetes cluster on [vSphere](https://www.vmware.com/se/products/vsphere.html) using Terraform and Kubespray.
Provision a Kubernetes cluster on [vSphere](https://www.vmware.com/products/vsphere.html) using Terraform and Kubespray.
## Overview
@ -98,20 +98,32 @@ ansible-playbook -i inventory.ini ../../cluster.yml -b -v
* `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)
* `ip`: The IP address of the machine
* `netmask`: The netmask to use (to be used on the right hand side in CIDR notation, e.g., `24`)
* `network`: The name of the network to attach the machines to
* `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)
* `ssh_public_keys`: List of public SSH keys to install on all machines
* `template_name`: The name of a base image (the OVF template be defined in 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`)*
* `folder`: Name of the folder to put all machines in (default: `""`)
* `prefix`: Prefix to use for all resources, required to be unique for all clusters in the same project (default: `"k8s"`)
* `inventory_file`: Name of the generated inventory file for Kubespray to use in the Ansible step (default: `inventory.ini`)
* `dns_primary`: The IP address of primary DNS server (default: `8.8.4.4`)
* `dns_secondary`: The IP address of secondary DNS server (default: `8.8.8.8`)
* `firmware`: Firmware to use (default: `bios`)
* `hardware_version`: The version of the hardware (default: `15`)
* `master_cores`: The number of CPU cores for the master nodes (default: 4)
* `master_memory`: The amount of RAM for the master nodes in MB (default: 4096)
* `master_disk_size`: The amount of disk space for the master nodes in GB (default: 20)
* `worker_cores`: The number of CPU cores for the worker nodes (default: 16)
* `worker_memory`: The amount of RAM for the worker nodes in MB (default: 8192)
* `worker_disk_size`: The amount of disk space for the worker nodes in GB (default: 100)
An example variables file can be found `default.tfvars`

15
contrib/terraform/vsphere/default.tfvars
View file

@ -1,23 +1,28 @@
prefix = "default"
prefix = "k8s"
inventory_file = "inventory.ini"
network = "VM Network"
machines = {
"master-0" : {
"node_type" : "master",
"ip" : "i-did-not-read-the-docs" # e.g. 192.168.0.2/24
"ip" : "i-did-not-read-the-docs", # e.g. 192.168.0.10
"netmask" : "24"
},
"worker-0" : {
"node_type" : "worker",
"ip" : "i-did-not-read-the-docs" # e.g. 192.168.0.2/24
"ip" : "i-did-not-read-the-docs", # e.g. 192.168.0.20
"netmask" : "24"
},
"worker-1" : {
"node_type" : "worker",
"ip" : "i-did-not-read-the-docs" # e.g. 192.168.0.2/24
"ip" : "i-did-not-read-the-docs", # e.g. 192.168.0.21
"netmask" : "24"
}
}
gateway = "i-did-not-read-the-docs" # e.g. 192.168.0.2
gateway = "i-did-not-read-the-docs" # e.g. 192.168.0.1
ssh_public_keys = [
# Put your public SSH key here

4
contrib/terraform/vsphere/main.tf
View file

@ -19,7 +19,7 @@ data "vsphere_datastore" "datastore" {
}
data "vsphere_network" "network" {
name = "VM Network"
name = var.network
datacenter_id = data.vsphere_datacenter.dc.id
}
@ -69,7 +69,7 @@ module "kubernetes" {
pool_id = vsphere_resource_pool.pool.id
datastore_id = data.vsphere_datastore.datastore.id
folder = ""
folder = var.folder
guest_id = data.vsphere_virtual_machine.template.guest_id
scsi_type = data.vsphere_virtual_machine.template.scsi_type
network_id = data.vsphere_network.network.id

16
contrib/terraform/vsphere/modules/kubernetes-cluster/main.tf
View file

@ -5,7 +5,8 @@ resource "vsphere_virtual_machine" "worker" {
if machine.node_type == "worker"
}
name = each.key
name = "${var.prefix}-${each.key}"
resource_pool_id = var.pool_id
datastore_id = var.datastore_id
@ -13,13 +14,14 @@ resource "vsphere_virtual_machine" "worker" {
memory = var.worker_memory
memory_reservation = var.worker_memory
guest_id = var.guest_id
enable_disk_uuid = "true"
enable_disk_uuid = "true" # needed for CSI provider
scsi_type = var.scsi_type
folder = var.folder
firmware = var.firmware
hardware_version = var.hardware_version
wait_for_guest_net_routable = false
wait_for_guest_net_timeout = 0
network_interface {
network_id = var.network_id
@ -47,6 +49,7 @@ resource "vsphere_virtual_machine" "worker" {
vapp {
properties = {
"user-data" = base64encode(templatefile("${path.module}/templates/cloud-init.tmpl", { ip = each.value.ip,
netmask = each.value.netmask,
gw = var.gateway,
dns = var.dns_primary,
ssh_public_keys = var.ssh_public_keys}))
@ -61,7 +64,8 @@ resource "vsphere_virtual_machine" "master" {
if machine.node_type == "master"
}
name = each.key
name = "${var.prefix}-${each.key}"
resource_pool_id = var.pool_id
datastore_id = var.datastore_id
@ -69,12 +73,15 @@ resource "vsphere_virtual_machine" "master" {
memory = var.master_memory
memory_reservation = var.master_memory
guest_id = var.guest_id
enable_disk_uuid = "true"
enable_disk_uuid = "true" # needed for CSI provider
scsi_type = var.scsi_type
folder = var.folder
firmware = var.firmware
hardware_version = var.hardware_version
wait_for_guest_net_routable = false
wait_for_guest_net_timeout = 0
network_interface {
network_id = var.network_id
adapter_type = var.adapter_type
@ -101,6 +108,7 @@ resource "vsphere_virtual_machine" "master" {
vapp {
properties = {
"user-data" = base64encode(templatefile("${path.module}/templates/cloud-init.tmpl", { ip = each.value.ip,
netmask = each.value.netmask,
gw = var.gateway,
dns = var.dns_primary,
ssh_public_keys = var.ssh_public_keys}))

11
contrib/terraform/vsphere/modules/kubernetes-cluster/output.tf
View file

@ -1,13 +1,16 @@
output "master_ip" {
value = {
for instance in vsphere_virtual_machine.master :
instance.name => instance.default_ip_address
for name, machine in var.machines :
name => machine.ip
if machine.node_type == "master"
}
}
output "worker_ip" {
value = {
for instance in vsphere_virtual_machine.worker :
instance.name => instance.default_ip_address
for name, machine in var.machines :
name => machine.ip
if machine.node_type == "worker"
}
}

2
contrib/terraform/vsphere/modules/kubernetes-cluster/templates/cloud-init.tmpl
View file

@ -25,7 +25,7 @@ write_files:
ens192:
dhcp4: false #true to use dhcp
addresses:
- ${ip}
- ${ip}/${netmask}
gateway4: ${gw} # Set gw here
nameservers:
addresses:

3
contrib/terraform/vsphere/modules/kubernetes-cluster/variables.tf
View file

@ -5,7 +5,8 @@ variable "machines" {
description = "Cluster machines"
type = map(object({
node_type = string
ip = string
ip = string
netmask = string
}))
}

2
contrib/terraform/vsphere/output.tf
View file

@ -23,7 +23,7 @@ output "vsphere_network" {
}
output "vsphere_folder" {
value = terraform.workspace
value = var.folder
}
output "vsphere_pool" {

59
contrib/terraform/vsphere/variables.tf
View file

@ -1,35 +1,20 @@
## Global ##
variable "prefix" {
default = ""
}
# Required variables
variable "machines" {
description = "Cluster machines"
type = map(object({
node_type = string
ip = string
netmask = string
}))
}
variable "inventory_file" {
default = "inventory.ini"
}
variable "network" {
default = "VM Network"
}
variable "network" {}
variable "gateway" {}
variable "dns_primary" {
default = "8.8.4.4"
}
variable "dns_secondary" {
default = "8.8.8.8"
}
variable "vsphere_datacenter" {}
variable "vsphere_compute_cluster" {}
@ -44,6 +29,35 @@ variable "vsphere_server" {}
variable "vsphere_hostname" {}
variable "ssh_public_keys" {
description = "List of public SSH keys which are injected into the VMs."
type = list(string)
}
variable "template_name" {}
# Optional variables (ones where reasonable defaults exist)
variable "folder" {
default = ""
}
variable "prefix" {
default = "k8s"
}
variable "inventory_file" {
default = "inventory.ini"
}
variable "dns_primary" {
default = "8.8.4.4"
}
variable "dns_secondary" {
default = "8.8.8.8"
}
variable "firmware" {
default = "bios"
}
@ -52,15 +66,6 @@ variable "hardware_version" {
default = "15"
}
variable "template_name" {
default = "ubuntu-focal-20.04-cloudimg"
}
variable "ssh_public_keys" {
description = "List of public SSH keys which are injected into the VMs."
type = list(string)
}
## Master ##
variable "master_cores" {