terraform-hcloud-kube-hetzner/modules/host/main.tf

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resource "random_string" "server" {
length = 3
lower = true
special = false
number = false
upper = false
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keepers = {
# We re-create the id (and server) whenever one of those attributes
# changes. This should include all input variables to this module,
# but NO SENSITIVE values as they might be logged here.
name = var.name
public_key = var.public_key
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additional_public_keys = join(",", var.additional_public_keys)
firewall_ids = join(",", var.firewall_ids)
placement_group_id = var.placement_group_id
labels = join(",", [for k, v in var.labels : "${k}=${v}"])
ipv4_subnet_id = var.ipv4_subnet_id
private_ipv4 = var.private_ipv4
server_type = var.server_type
# Excluding these for now as they are part of the ignore_changes below
#ssh_keys = join(",", var.ssh_keys)
#location = var.location
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}
}
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resource "hcloud_server" "server" {
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name = local.name
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image = "ubuntu-20.04"
rescue = "linux64"
server_type = var.server_type
location = var.location
ssh_keys = var.ssh_keys
firewall_ids = var.firewall_ids
placement_group_id = var.placement_group_id
user_data = data.template_cloudinit_config.config.rendered
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labels = var.labels
# Prevent destroying the whole cluster if the user changes
# any of the attributes that force to recreate the servers.
lifecycle {
ignore_changes = [
location,
ssh_keys,
user_data,
]
}
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connection {
user = "root"
private_key = local.ssh_private_key
agent_identity = local.ssh_identity
host = self.ipv4_address
}
# Install MicroOS
provisioner "remote-exec" {
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inline = [
"set -ex",
"apt-get update",
"apt-get install -y aria2",
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"aria2c --follow-metalink=mem https://download.opensuse.org/tumbleweed/appliances/openSUSE-MicroOS.x86_64-OpenStack-Cloud.qcow2.meta4",
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"qemu-img convert -p -f qcow2 -O host_device $(ls -a | grep -ie '^opensuse.*microos.*qcow2$') /dev/sda",
]
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}
# Issue a reboot command and wait for MicroOS to reboot and be ready
provisioner "local-exec" {
command = <<-EOT
ssh ${local.ssh_args} root@${self.ipv4_address} '(sleep 2; reboot)&'; sleep 3
until ssh ${local.ssh_args} -o ConnectTimeout=2 root@${self.ipv4_address} true 2> /dev/null
do
echo "Waiting for MicroOS to reboot and become available..."
sleep 3
done
EOT
}
# Install k3s-selinux (compatible version)
provisioner "remote-exec" {
inline = [
"set -ex",
"transactional-update pkg install -y k3s-selinux"
]
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}
# Issue a reboot command and wait for MicroOS to reboot and be ready
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provisioner "local-exec" {
command = <<-EOT
ssh ${local.ssh_args} root@${self.ipv4_address} '(sleep 2; reboot)&'; sleep 3
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until ssh ${local.ssh_args} -o ConnectTimeout=2 root@${self.ipv4_address} true 2> /dev/null
do
echo "Waiting for MicroOS to reboot and become available..."
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sleep 3
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done
EOT
}
}
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resource "hcloud_server_network" "server" {
ip = var.private_ipv4
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server_id = hcloud_server.server.id
subnet_id = var.ipv4_subnet_id
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}
data "template_cloudinit_config" "config" {
gzip = true
base64_encode = true
# Main cloud-config configuration file.
part {
filename = "init.cfg"
content_type = "text/cloud-config"
content = templatefile(
"${path.module}/templates/userdata.yaml.tpl",
{
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hostname = local.name
sshAuthorizedKeys = concat([local.ssh_public_key], var.additional_public_keys)
}
)
}
}