detect cloud platform

cloud_detect.sh

#!/bin/bash
#
# detect cloud platform and query for instance type
#
platform='unknown'
instance_type="unknown"

# AWS EC2
if [ -f /sys/hypervisor/uuid ] ; then
  instance_uuid=$(cat /sys/hypervisor/uuid)
  if [[ $instance_uuid == ec2* ]] ; then
    platform='ec2'
    instance_type=$(curl -s http://169.254.169.254/latest/meta-data/instance-type)
  fi
fi

# GCP GCE
dmesg | grep -q "BIOS Google"
if [ $? -eq 0 ] ; then
  platform='gce'
  instance_type=$(curl -s "http://metadata.google.internal/computeMetadata/v1/instance/machine-type" -H "Metadata-Flavor: Google" | cut -d/ -f4)
fi

echo "PLATFORM: $platform"
echo "INSTANCE: $instance_type"

# EOF