ec2 user_data snippets

user_data.sh

# get instance attrs
INSTANCE_ID=$(curl -s http://169.254.169.254/latest/meta-data/instance-id)
PRIVATE_IP=$(curl -s http://169.254.169.254/latest/meta-data/local-ipv4)

# get asg name
ASG_NAME=$(aws autoscaling describe-auto-scaling-instances --region us-east-1 --instance-ids $INSTANCE_ID --query 'AutoScalingInstances[0].AutoScalingGroupName' --output text)

# get tags
aws ec2 describe-tags --region us-east-1 --filters "Name=resource-id,Values=${INSTANCE_ID}"

# append to file
cat <<EOF >> file.txt
my ip is:
  $PRIVATE_IP
end
EOF