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AWS EMRをデフォルトの設定のままで起動できない場合の対処方法

Posted at

現象

AWS EMR のクラスタを作ったが

Terminated with errorsFailed to provision ec2 instances because 'The requested instance profile EMR_AutoScaling_DefaultRole is invalid'

というエラーが出てクラスタを起動できない。

対応方法

IAM で EMR_AutoScaling_DefaultRole に AmazonEC2FullAccess を付与してから、新しいクラスタを作り直す。

本来は必要最低限の権限だけを与えるべきだが、 EMR が内部で何を行なっているのかよくわからなかったので、こういう対応をした。最低限の権限がわかる人がいたら教えて欲しい。

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