EKS Cluster Create Failed

Question

I am trying to create an eks cluster using the eksctl command. However, an error occurs as below: AWS::EKS::Cluster/ControlPlane: CREATE_FAILED – "Resource handler returned message: \"Duplicate key

Accepted Answer

You can try to create a EKS cluster with other cluster name.
I think it will work.

And back to the question, I believe you had the EKS same cluster name had created.
If you can't delete it from cloudformation, Highly recommend to check the detail about the cloudformations log to get more info.
Sometimes, you can't delete the cloudformation cause of you attached some IAM policy to IAM Role which created by eksctl.

Answer

I have a problem too, But I can solve this issue.

In my example, to install EKS I use eksctl and configure file. like this.

```
apiVersion: eksctl.io/v1alpha5
kind: ClusterConfig

metadata:
  name: cluster-name
  region: ap-southeast-1
  version: "1.21"
  tags:
    Createby: xxxxx
    Environment: env-name
    Name: cluster-name
    Owner: owner-name
    Service: service-name
    System: system-name
```

in my configuration in the metadata section, There is a tag name that in earlier versions of eksctl has no problem, but in eksctl v0.82.0 there is a problem. When I checked in cloudformation template, I found a duplicate Tag Name like this.

```
        "Tags": [
          {
            "Key": "Environment",
            "Value": "env-name"
          },
          {
            "Key": "Owner",
            "Value": "owner-name"
          },
          {
            "Key": "Service",
            "Value": "service-name"
          },
          {
            "Key": "System",
            "Value": "system-name"
          },
          {
            "Key": "Createby",
            "Value": "xxxxx"
          },
          {
            "Key": "Name",
            "Value": "cluster-name"
          },
          {
            "Key": "Name",
            "Value": {
              "Fn::Sub": "${AWS::StackName}/ControlPlane"
            }
          }
        ],
```

When I tried to remove the tag name from config files and try again, it's work fine.

```
apiVersion: eksctl.io/v1alpha5
kind: ClusterConfig

metadata:
  name: cluster-name
  region: ap-southeast-1
  version: "1.21"
  tags:
    Createby: xxxxx
    Environment: env-name
    Owner: owner-name
    Service: service-name
    System: system-name
```

EKS Cluster Create Failed

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