resource "null_resource" "k3s_cleanup_worker1" {
  # SSH 登录到 worker 节点
  connection {
    type        = "ssh"
    host        = var.worker_ips[0]
    user        = "root"
    password    = var.worker_password
  }

  provisioner "remote-exec" {
    inline = [
      "# Stop k3s-agent service if running",
      "systemctl stop k3s-agent 2>/dev/null || true",
      "# Kill any remaining k3s processes",
      "pkill -f k3s 2>/dev/null || true",
      "# Remove k3s data directory",
      "rm -rf /var/lib/rancher/k3s",
      "# Remove k3s-agent service file",
      "rm -f /etc/systemd/system/k3s-agent.service",
      "echo 'Cleanup completed on worker node 1'"
    ]
  }
}

resource "null_resource" "k3s_cleanup_worker2" {
  connection {
    type        = "ssh"
    host        = var.worker_ips[1]
    user        = "root"
    password    = var.worker_password
  }

  provisioner "remote-exec" {
    inline = [
      "# Stop k3s-agent service if running",
      "systemctl stop k3s-agent 2>/dev/null || true",
      "# Kill any remaining k3s processes",
      "pkill -f k3s 2>/dev/null || true",
      "# Remove k3s data directory",
      "rm -rf /var/lib/rancher/k3s",
      "# Remove k3s-agent service file",
      "rm -f /etc/systemd/system/k3s-agent.service",
      "echo 'Cleanup completed on worker node 2'"
    ]
  }
}

resource "null_resource" "k3s_install_worker1" {
  depends_on = [null_resource.copy_token_to_workers, null_resource.k3s_cleanup_worker1]

  connection {
    type        = "ssh"
    host        = var.worker_ips[0]
    user        = "root"
    password    = var.worker_password
  }

  provisioner "remote-exec" {
    inline = [
      "if [ -f /usr/local/bin/k3s ]; then",
      "  echo 'k3s binary already exists, skipping download'",
      "else",
      "  wget -O /usr/local/bin/k3s ${var.k3s_download_url}",
      "  chmod +x /usr/local/bin/k3s",
      "fi",
      "TOKEN=$(cat /root/node-token)",
      "echo -e '\\033[32m--Install k3s-agent systemd service--\\033[0m'",
      # 注册 systemd 服务
      "cat > /etc/systemd/system/k3s-agent.service <<EOF",
      "[Unit]",
      "Description=K3s Agent",
      "After=network.target",
      "[Service]",
      "ExecStart=/usr/local/bin/k3s agent --server https://${var.master_ip}:6443 --token $TOKEN --node-name worker-node-${replace(var.worker_ips[0], \".\", \"-\")} --node-external-ip=${var.worker_ips[0]} --data-dir /var/lib/rancher/k3s",
      "Restart=always",
      "KillMode=process",
      "Delegate=yes",
      "LimitNOFILE=65536",
      "[Install]",
      "WantedBy=multi-user.target",
      "EOF",
      "systemctl daemon-reload",
      "systemctl enable --now k3s-agent",
      "echo -e '\\033[32m--k3s agent started successfully--\\033[0m'",
      "sleep 3",
    ]
  }
}


resource "null_resource" "k3s_install_worker2" {
  depends_on = [null_resource.copy_token_to_workers, null_resource.k3s_cleanup_worker2]

  connection {
    type        = "ssh"
    host        = var.worker_ips[1]
    user        = "root"
    password    = var.worker_password
  }

  provisioner "remote-exec" {
    inline = [
      "if [ -f /usr/local/bin/k3s ]; then",
      "  echo 'k3s binary already exists, skipping download'",
      "else",
      "  wget -O /usr/local/bin/k3s ${var.k3s_download_url}",
      "  chmod +x /usr/local/bin/k3s",
      "fi",
      "TOKEN=$(cat /root/node-token)",
      "echo -e '\\033[32m--Install k3s-agent systemd service--\\033[0m'",
      # 注册 systemd 服务
      "cat > /etc/systemd/system/k3s-agent.service <<EOF",
      "[Unit]",
      "Description=K3s Agent",
      "After=network.target",
      "[Service]",
      "ExecStart=/usr/local/bin/k3s agent --server https://${var.master_ip}:6443 --token $TOKEN --node-name worker-node-${replace(var.worker_ips[0], \".\", \"-\")} --node-external-ip=${var.worker_ips[1]} --data-dir /var/lib/rancher/k3s",
      "Restart=always",
      "KillMode=process",
      "Delegate=yes",
      "LimitNOFILE=65536",
      "[Install]",
      "WantedBy=multi-user.target",
      "EOF",
      "systemctl daemon-reload",
      "systemctl enable --now k3s-agent",
      "echo -e '\\033[32m--k3s agent started successfully--\\033[0m'",
      "sleep 3",
    ]
  }
}