问题
I have implemented a cluster using AWS EMR. I have a master ndoe with 2 core nodes with hadoop bootstrap action. Now, I would like to use autoscaling and adjust the cluster size dynamically based on cpu threshold and some other constraints. BUt, I have no idea as there isn't much information on the web on how to use AutoScaling on already existing cluster. Any help.
回答1:
Currently you can't launch a EMR CLuster in a AutoScaling Group. But you can achieve a very similar goal by delivering your CloudWatch alarms notification to an SQS queue and a script consuming from that queue that uses AWS CLI or SDK to modify the cluster.
来源：https://stackoverflow.com/questions/25512375/how-do-i-scale-my-aws-emr-cluster-with-1-master-and-2-core-nodes-using-aws-auto