So I was using .describe_instances() to pull information about my companies EC2 instances. I noticed that for each instance under "NetworkInterfaces", it included "Groups" and "SecurityGroups". At a glance, they both seem to have the same GroupId and GroupName pairings. Why is this information duplicated? Or is there a reason why the "Groups" and "SecurityGroups" exist separately?
What's the Difference between "Groups" and "SecurityGroups" in .describe_instances() Boto3 AWS?
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1 Answers
If you check the response section of the boto3 method you'll find the following description:
Groups (list) -- [EC2-Classic only] The security groups.
SecurityGroups (list) -- The security groups for the instance.
so Groups is used when referring to groups in the EC2-classic mode (which will soon be deprecated), whereas SecurityGroups is used when referring to groups in the more standard VPC configuration.
You can find more information on EC2-Classic here.
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