terraform-hcloud-kube-hetzner/temp/agents.tf
2022-02-15 23:54:55 +01:00

106 lines
3.0 KiB
HCL

resource "hcloud_server" "agents" {
count = var.agents_num
name = "k3s-agent-${count.index}"
image = data.hcloud_image.linux.name
rescue = "linux64"
server_type = var.agent_server_type
location = var.location
ssh_keys = [hcloud_ssh_key.k3s.id]
firewall_ids = [hcloud_firewall.k3s.id]
placement_group_id = hcloud_placement_group.k3s.id
labels = {
"provisioner" = "terraform",
"engine" = "k3s",
}
connection {
user = "root"
private_key = local.ssh_private_key
agent_identity = local.ssh_identity
host = self.ipv4_address
}
provisioner "file" {
content = templatefile("${path.module}/templates/config.ign.tpl", {
name = self.name
ssh_public_key = local.ssh_public_key
})
destination = "/root/config.ign"
}
# Install MicroOS
provisioner "remote-exec" {
inline = local.MicroOS_install_commands
}
# Issue a reboot command
provisioner "local-exec" {
command = "ssh ${local.ssh_args} root@${self.ipv4_address} '(sleep 2; reboot)&'; sleep 3"
}
# Wait for MicroOS to reboot and be ready
provisioner "local-exec" {
command = <<-EOT
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 2
done
EOT
}
# Generating and uploading the agent.conf file
provisioner "file" {
content = templatefile("${path.module}/templates/agent.conf.tpl", {
server = "https://${local.first_control_plane_network_ip}:6443"
token = random_password.k3s_token.result
})
destination = "/etc/rancher/k3s/agent.conf"
}
# Generating k3s agent config file
provisioner "file" {
content = yamlencode({
node-name = self.name
kubelet-arg = "cloud-provider=external"
flannel-iface = "eth1"
node-ip = cidrhost(hcloud_network_subnet.k3s.ip_range, 257 + count.index)
})
destination = "/etc/rancher/k3s/config.yaml"
}
# Run the agent
provisioner "remote-exec" {
inline = [
# set the hostname in a persistent fashion
"hostnamectl set-hostname ${self.name}",
# first we disable automatic reboot (after transactional updates), and configure the reboot method as kured
"rebootmgrctl set-strategy off && echo 'REBOOT_METHOD=kured' > /etc/transactional-update.conf",
# then we start k3s agent and join the cluster
"systemctl enable k3s-agent",
<<-EOT
until systemctl status k3s-agent > /dev/null
do
systemctl start k3s-agent
echo "Starting k3s-agent and joining the cluster..."
sleep 2
done
EOT
]
}
network {
network_id = hcloud_network.k3s.id
ip = cidrhost(hcloud_network_subnet.k3s.ip_range, 257 + count.index)
}
depends_on = [
hcloud_server.first_control_plane,
hcloud_network_subnet.k3s
]
}