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Background

We currently use AWS blue/green deployments with autoscaling (ASG). This works well, but due to the nature blue/green works (ie we're constantly launching brand new instances and tearing down old ones).. all auto scaling data in the old instances die with them as depicted here:

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Question

Waht's the easiest way to persist the ASG count and ASG CPU util data and let it appear on our cloudwatch?

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  • Unfortunately cloudwatch has only AutoScalingGroupName/ImageId/InstanceId/InstanceType EC2 metric dimension, so the only option you have is to graph both blue/green ASGs on the same chart giving them same colour. Otherwise it would be great to have chart per tag and show graphs based on that. – Most Wanted Nov 7 '20 at 18:18

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