deploy.tf

provider "openstack" {
}

terraform {
	required_providers {
		openstack = {
			source= "terraform-provider-openstack/openstack"
		}
	}
}

locals {
	ord = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"]
	keyfile = "ssh-key.${var.domain}.txt"
}

data "openstack_compute_keypair_v2" "userkey" {
	name = var.ssh
}

data "template_file" "user_data_common" {
	count = var.n + 1
	template = file("common/ctx.yaml")
	vars = {
		host = count.index == 0 ? var.master_hostname : "${var.node_hostname}${count.index}"
		domain = var.domain
	}
}

data "template_file" "user_data_deployment" {
	template = file("deployments/${var.type}/ctx.yaml")
}

data "template_cloudinit_config" "ctx" {
	count = var.n + 1
	part {
		content = data.template_file.user_data_common[count.index].rendered
	}
	part {
		content = data.template_file.user_data_deployment.rendered
	}
	part {
		content = <<EOT
#cloud-config

merge_type:
  - name: list
    settings: [append]
  - name: dict
    settings: [recurse_array]
%{ if count.index != 0 ~}

fs_setup:
%{ for i in range(0, var.volumes) ~}
  - label: DATA${i + 1}
    filesystem: ext4
    device: /dev/sd${local.ord[i + 1]}
    partition: none
%{ endfor ~}

mounts:
%{ for i in range(0, var.volumes) ~}
  - [ LABEL=DATA${i + 1}, /data/${i + 1} ]
%{ endfor ~}
%{ endif ~}

users:
  - default
  - name: deployadm
    gecos: Deploy Admin
    shell: /bin/bash
    ssh_authorized_keys:
      - ${openstack_compute_keypair_v2.localkey.public_key}
    sudo:
      - ALL=(ALL) NOPASSWD:ALL
%{ if count.index == 0 ~}

write_files:
  - path: /home/deployadm/.ssh/id_rsa
    permissions: '0600'
    content: |
      ${indent(6, openstack_compute_keypair_v2.localkey.private_key)~}
%{ endif ~}

runcmd:
  - chown -R deployadm:deployadm /home/deployadm
EOT
	}
}

resource "openstack_compute_keypair_v2" "localkey" {
	name = var.domain
}

resource "local_file" "localkey" {
    filename = local.keyfile
	file_permission = "0600"
    sensitive_content = openstack_compute_keypair_v2.localkey.private_key
}

resource "openstack_compute_instance_v2" "server" {
	count = var.n + 1
	name = format("%s.%s", data.template_file.user_data_common[count.index].vars.host, var.domain)
	flavor_name = var.flavor
	image_name = var.image
	key_pair = var.ssh
	security_groups = [
		openstack_networking_secgroup_v2.all.name,
		openstack_networking_secgroup_v2.ssh.name,
	]
	user_data = data.template_cloudinit_config.ctx[count.index].rendered
	network {
		name = var.local_network
	}
}

resource "openstack_networking_floatingip_v2" "floatip_1" {
	pool = var.public_network
}

resource "openstack_compute_floatingip_associate_v2" "server-fip-1" {
	floating_ip = openstack_networking_floatingip_v2.floatip_1.address
	instance_id = openstack_compute_instance_v2.server[0].id
	provisioner "local-exec" {
		command = <<EOF
echo Private IP: ${openstack_compute_instance_v2.server[0].network[0].fixed_ip_v4}
echo Remote  IP: ${self.floating_ip}
EOF
	}
}

resource "openstack_blockstorage_volume_v3" "volume" {
	count = var.volumes * var.n
	name  = format("%s%s.%s", data.template_file.user_data_common[floor(count.index / var.volumes) + 1].vars.host, local.ord[count.index % var.volumes], var.domain)
	size  = var.volume_size
}

resource "openstack_compute_volume_attach_v2" "volume-attach" {
	count = var.volumes * var.n
	instance_id = openstack_compute_instance_v2.server[floor(count.index / var.volumes) + 1].id
	volume_id   = openstack_blockstorage_volume_v3.volume[count.index].id
}

resource "random_password" "secrets" {
	count = 3
	length = "36"
	keepers = {
		masterid = openstack_compute_instance_v2.server[0].id
	}
}

output "config" {
	value = {
		n = var.n,
		domain = var.domain,
		image_user = var.image_user,
		master_hostname = var.master_hostname,
		node_hostname = var.node_hostname,
		type = var.type,
		secrets = {
			http_signature_secret = random_password.secrets[0].result,
			kerberos_admin_password = random_password.secrets[1].result,
			kerberos_master_password = random_password.secrets[2].result,
		},
		volumes = var.volumes,
	}
	sensitive = true
}

output "hosts" {
	value = {
		for instance in openstack_compute_instance_v2.server:
			data.template_file.user_data_common[index(openstack_compute_instance_v2.server[*].id, instance.id)].vars.host => length(instance.network) >= 1 ? instance.network[0].fixed_ip_v4 : null
	}
}

output "public_hosts" {
	value = {
		(data.template_file.user_data_common[0].vars.host) = openstack_compute_floatingip_associate_v2.server-fip-1.floating_ip
	}
}