在创建 EKS Node Group 时，可以通过添加 Launch Template 或 Launch Configuration 来调整容器最大可用 Pod 数量（maxPods）的值，如下所示：

1. Launch Template 示例：

resource "aws_launch_template" "example" {
  name = "example-launch-template"
  image_id = "ami-0abc123"
  instance_type = "t2.micro"

  user_data = <<-EOF
              #!/bin/bash
              echo "Hello, World!" > index.html
              nohup busybox httpd -f -p 8080 &
              EOF
}

resource "aws_eks_node_group" "example" {
  cluster_name = aws_eks_cluster.example.name
  node_group_name = "example-node-group"
  node_role_arn = aws_iam_role.example.arn
  subnet_ids = [aws_subnet.example.id]
  launch_template = {
    id = aws_launch_template.example.id
    version = "$Latest"
  }
  scaling_config {
    desired_size = 2
    max_size = 2
    min_size = 2
  }
  remote_access {
    ec2_ssh_key = aws_key_pair.example.key_name
    source_security_group_ids = [aws_security_group.example.id]
  }
  tags = {
    Terraform = "true"
    Environment = "test"
  }
  capacity_type = "ON_DEMAND"
  max_pods = 30
}

在上面的示例中，我们通过 max_pods 参数将容器最大可用 Pod 数量调整为 30。

2. Launch Configuration 示例：

resource "aws_launch_configuration" "example" {
  name = "example-launch-configuration"
  image_id = "ami-0abc123"
  instance_type = "t2.micro"
  user_data = <<-EOF
              #!/bin/bash
              echo "Hello, World!" > index.html
              nohup busybox httpd -f -p 8080 &
              EOF
}

resource "aws_eks_node_group" "example" {
  cluster_name = aws_eks_cluster.example.name
  node_group_name = "example-node-group"
  node_role_arn = aws_iam_role.example.arn