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Ramesh Kumar
Asked: 2015-08-05 22:11:01 +0800 CST

Is it possible to get aws ec2 instance id based on its IP address

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I have list of IP addressed, I want to find if instances associated with the IP address are still running or terminated. I am launching and terminating lot of instances on daily basis, just want to remove their certificates from puppetmaster.

If there is any alternative method, I can achieve my goal, I can do that.

amazon-ec2

3 Answers

  1. Best Answer

    aws ec2 describe-instances --filter Name=ip-address,Values=IP_1,..IP_N

    Should do what you need.

    use the filter name of private-ip-address to select using private address in your VPC.

    Pipe through something like

    jq -r '.Reservations[].Instances[] | .InstanceId, .PublicIpAddress'

    if you want the corresponding InstanceID

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  2. You can use --query and --output formats if you want to use this in a bash script. 

    aws ec2 describe-instances --filter Name=private-ip-address,Values=x.x.x.x --query 'Reservations[].Instances[].InstanceId' --output text

    This will give you text response without json formatting

    i-03c1ad0d6abe32323
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  3. An alternative approach would be to use CloudWatch Events to listen for EC2 instances being terminated, and have the listener (which could be a Lambda function, or some custom service listening to SQS) remove the corresponding certificates from Puppet.

    References:

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