使用terraform在aws上创建一个eks集群

首先，需要安装terraform工具和AWS CLI，并配置好AWS CLI的访问密钥和密钥ID。
创建一个新的目录，用于存储terraform配置文件。
在该目录下创建一个名为“provider.tf”的文件，用于指定AWS作为terraform的提供者。文件内容如下：

provider "aws" {
  region = "us-west-2"
}

在该目录下创建一个名为“eks.tf”的文件，用于定义EKS集群的资源。文件内容如下：

resource "aws_vpc" "eks_vpc" {
  cidr_block = "10.0.0.0/16"
  tags = {
    Name = "eks-vpc"
  }
}

resource "aws_internet_gateway" "eks_gateway" {
  vpc_id = aws_vpc.eks_vpc.id
  tags = {
    Name = "eks-gateway"
  }
}

resource "aws_subnet" "eks_subnet" {
  vpc_id = aws_vpc.eks_vpc.id
  cidr_block = "10.0.1.0/24"
  availability_zone = "us-west-2a"
  tags = {
    Name = "eks-subnet"
  }
}

resource "aws_eks_cluster" "eks_cluster" {
  name = "eks-cluster"
  role_arn = aws_iam_role.eks_role.arn
  vpc_config {
    subnet_ids = [aws_subnet.eks_subnet.id]
  }
}

resource "aws_iam_role" "eks_role" {
  name = "eks-role"
  assume_role_policy = jsonencode({
    Version = "2012-10-17"
    Statement = [
      {
        Effect = "Allow"
        Principal = {
          Service = "eks.amazonaws.com"
        }
        Action = "sts:AssumeRole"
      }
    ]
  })
}

resource "aws_iam_role_policy_attachment" "eks_policy_attachment" {
  policy_arn = "arn:aws:iam::aws:policy/AmazonEKSClusterPolicy"
  role = aws_iam_role.eks_role.name
}

resource "aws_security_group" "eks_security_group" {
  name = "eks-security-group"
  vpc_id = aws_vpc.eks_vpc.id
  ingress {
    from_port = 0
    to_port = 65535
    protocol = "tcp"
    cidr_blocks = ["0.0.0.0/0"]
  }
  egress {
    from_port = 0
    to_port = 65535
    protocol = "tcp"
    cidr_blocks = ["0.0.0.0/0"]
  }
}

resource "aws_eks_node_group" "eks_node_group" {
  cluster_name = aws_eks_cluster.eks_cluster.name
  node_group_name = "eks-node-group"
  node_role_arn = aws_iam_role.eks_role.arn
  subnets = [aws_subnet.eks_subnet.id]
  instance_types = ["t2.small"]
  scaling_config {
    desired_size = 2
    max_size = 2
    min_size = 1
  }
  remote_access {
    ec2_ssh_key = "eks-ssh"
    source_security_group_id = aws_security_group.eks_security_group.id
  }
}

运行“terraform init”初始化terraform。
运行“terraform apply”创建EKS集群。
创建完毕后，可以使用AWS CLI获取集群的kubeconfig文件，然后使用kubectl命令连接到集群。

aws eks update-kubeconfig --name eks-cluster
kubectl get nodes

当不再需要该EKS集群时，可以运行“terraform destroy”删除所有相关的资源。