Undefined Title

List security groups associated with EC2 instances


I’m into writing one-liners using join, aws and jq commands in order to briefly check some information without logging in management console.

The following one-liner prints security groups with EC2 instance ID and tag Name. It’s helpful to glance security group association.

join -a1 <(aws ec2 describe-instances --filter "Name=instance-state-name,Values=running"| \
           jq -r '.Reservations[].Instances[]|. as $it|
	          {x: $it.InstanceId, a:.SecurityGroups[].GroupId}|
		  [.a, .x, ($it.Tags|select(.!=null)[]|select(.Key=="Name").Value)]|
		  @tsv'|sort) \
         <(aws ec2 describe-security-groups | \
	   jq -r '.SecurityGroups[]|. as $sg|.IpPermissions[]|
	          [$sg.GroupId, .FromPort, .ToPort, .IpProtocol,
		  .UserIdGroupPairs[].GroupId, .IpRanges[].CidrIp,
		  @tsv'|sort) \
  | sort -k2