How can i retrieve the instance id of an instance that is part of an auto scaling group?-CodePudding

I have this bash script that is trying to return the stopped instance Ids of an autoscaling group.

aws ec2 describe-instances --filter "Name=tag:aws:autoscaling:groupName,Values=devASG-123" --query "Reservations[].Instances[?State.Name==stopped].InstanceId" --output text --profile dev

This keeps returning a blank value even though I have instances that are stopped

How can i fix this?

CodePudding user response：

Try this:

aws --profile dev ec2 describe-instances --filters \
  "Name=tag:aws:autoscaling:groupName,Values=devASG-123" \
  "Name=instance-state-name,Values=stopped" \
  --query "Reservations[*].Instances[*].InstanceId

or use regex

aws --profile dev ec2 describe-instances --filters \
  "Name=tag:aws:autoscaling:groupName,Values=devASG-123" \
  "Name=instance-state-name,Values=stopped" | \
  grep -o '\"i-[0-9a-f]\\ \"' | grep -o '[^\"]\\ '