terraform-hcloud-kube-hetzner/agents.tf

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2022-02-06 08:40:51 +01:00
resource "hcloud_server" "agents" {
count = var.agents_num
name = "k3s-agent-${count.index}"
image = data.hcloud_image.linux.name
rescue = "linux64"
server_type = var.agent_server_type
location = var.location
ssh_keys = [hcloud_ssh_key.k3s.id]
firewall_ids = [hcloud_firewall.k3s.id]
placement_group_id = hcloud_placement_group.k3s_placement_group.id
labels = {
"provisioner" = "terraform",
"engine" = "k3s",
}
provisioner "file" {
content = templatefile("${path.module}/templates/config.ign.tpl", {
name = self.name
ssh_public_key = local.ssh_public_key
})
destination = "/root/config.ign"
connection {
user = "root"
private_key = local.ssh_private_key
agent_identity = local.ssh_identity
host = self.ipv4_address
}
}
# Install MicroOS
provisioner "remote-exec" {
inline = local.MicroOS_install_commands
connection {
user = "root"
private_key = local.ssh_private_key
agent_identity = local.ssh_identity
host = self.ipv4_address
}
}
# Wait for MicroOS to reboot and be ready
provisioner "local-exec" {
command = "sleep 60 && ping ${self.ipv4_address} | grep --line-buffered 'bytes from' | head -1 && sleep 30"
}
# Generating and uploading the angent.conf file
provisioner "file" {
content = templatefile("${path.module}/templates/agent.conf.tpl", {
server_url = "https://${local.first_control_plane_network_ip}:6443"
node_token = random_password.k3s_token.result
})
destination = "/etc/rancher/k3s/agent.conf"
connection {
user = "root"
private_key = local.ssh_private_key
agent_identity = local.ssh_identity
host = self.ipv4_address
}
}
# Generating k3s server config file
provisioner "file" {
content = templatefile("${path.module}/templates/agent_config.yaml.tpl", {
node_ip = cidrhost(hcloud_network.k3s.ip_range, 2 + var.servers_num + count.index)
node_name = self.name
})
destination = "/etc/rancher/k3s/config.yaml"
connection {
user = "root"
private_key = local.ssh_private_key
agent_identity = local.ssh_identity
host = self.ipv4_address
}
}
# Run the agent
provisioner "remote-exec" {
inline = [
"set -ex",
# 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 turn on k3s and join the cluster
"systemctl --now enable k3s-agent",
]
connection {
user = "root"
private_key = local.ssh_private_key
agent_identity = local.ssh_identity
host = self.ipv4_address
}
}
network {
network_id = hcloud_network.k3s.id
ip = cidrhost(hcloud_network.k3s.ip_range, 2 + var.servers_num + count.index)
}
depends_on = [
hcloud_server.first_control_plane,
hcloud_network_subnet.k3s
]
}