[Solved] You tried to create an EKS cluster with this command:aws eks create-cluster --name mycluster --role-arn arn:aws:iam::123456789012:role/EKSRole... What is the most likely cause? | AWS

AWS - EKS

You tried to create an EKS cluster with this command:

aws eks create-cluster --name mycluster --role-arn arn:aws:iam::123456789012:role/EKSRole --resources-vpc-config subnetIds=subnet-12345 subnet-67890

The command failed. What is the most likely cause?

AMissing comma between subnet IDs in <code>subnetIds</code> parameter

BIncorrect IAM role ARN format

CCluster name <code>mycluster</code> is invalid

DSubnets are in different availability zones

Step-by-Step Solution

Solution:

Step 1: Review subnetIds parameter format
The subnet IDs must be comma-separated inside the subnetIds= value. Here, a space separates them, which is invalid syntax.
Step 2: Check other parameters
The IAM role ARN format looks correct, cluster name is valid, and subnets in different zones are recommended, not an error.
Final Answer:
Missing comma between subnet IDs in subnetIds parameter -> Option A
Quick Check:
Comma separates subnet IDs [OK]

Quick Trick: Comma separate subnet IDs, not spaces [OK]

Common Mistakes:

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