expand ebs and xfs filesystem

gistfile1.txt

#!/bin/bash

# ec2 metadata
instance_document=$(curl -s 'http://169.254.169.254/latest/dynamic/instance-identity/document')
instance_id=$(echo ${instance_document} | jq -r .instanceId)
instance_region=$(echo ${instance_document} | jq -r .region)

# AWS COMMAND
AWS_BIN="$(which aws) --region ${instance_region}"

# ec2 attached volume -exclude root
attached_volumes=$(${AWS_BIN} ec2 describe-volumes --filters Name=attachment.instance-id,Values=${instance_id} | jq -r '.Volumes[] | [.Attachments[].VolumeId, .Attachments[].Device, .Size] | @tsv' | grep -v '/dev/sda1')

# volumes defined in tag
# aws_device_path   os_device_path  os_mount_point
# /dev/sdi          /dev/xvdi       /data
volume_tags=$(${AWS_BIN} ec2 describe-tags --filters Name=resource-id,Values=${instance_id} | jq -r '.Tags[] | select(.Key == "ebs_volumes")|.Value' | jq -r '.volumes[] | [.mount_letter, .mount_path] | @tsv'  | awk '{print "/dev/sd"$1, "/dev/xvd"$1, $2}')

merged_volume_list="/tmp/merged_volume_list"

echo "" > ${merged_volume_list}

# merge both lists and print to user
echo "Current EBS mount(s) that can be expanded:"
IFS=$'\n'
option_count=1
for volume in ${volume_tags} ; do
   v=$(echo "${volume}" | awk '{print $1}')
   volume_id=$(echo "${attached_volumes}" | grep "${v}" | awk '{print $1}')
   volume_size=$(echo "${attached_volumes}" | grep "${v}" | awk '{print $3}')
   echo -e "[${option_count}] ${volume_id} ${volume}" >> ${merged_volume_list}
   echo -e "[${option_count}] EBS_SIZE: [$volume_size] EBS_ID: [${volume_id}] EBS_ALIASES: [${volume}]" 
   ((option_count++))
done
unset IFS

echo ""
echo "Enter which volume to expand (enter integer):"
read selection


selected_volume=$(cat ${merged_volume_list} | grep "^\[${selection}]")
if [ -z "$selected_volume" ] ; then
    echo "ERROR: selection does not exits"
    exit 99
fi

# Check if a number
case $selection in
    ''|*[!0-9]*)
        echo -e "[ERROR] Integer not detected, exiting.."
        exit 99
        ;;
    *)
        ;;
esac

echo ""
echo "Enter new size in GB for volume (enter integer):"
read new_size

# Check if a number
case $new_size in
    ''|*[!0-9]*)
        echo -e "[ERROR] Integer not detected, exiting.."
        exit 99
        ;;
    *)
        ;;
esac

echo ""

ebs_volume_id=$(echo "${selected_volume}" | awk '{print $2}')
device_path=$(echo "${selected_volume}" | awk '{print $4}')
mount_point=$(echo "${selected_volume}" | awk '{print $5}')

echo "[*] Attempting to expand volume with the following properties:"
echo "ebs_id: ${ebs_volume_id}"
echo "device_path: ${device_path}"
echo "mount_point: ${mount_point}"
echo "NEW_SIZE: ${new_size}"

echo ""
echo "[STEP 1 OF 3] Expand EBS volume"
${AWS_BIN} ec2 modify-volume --volume-id ${ebs_volume_id} --size ${new_size}

# wait a bit
sleep 120

echo ""
echo "[STEP 2 OF 3] Expanding partition"
growpart ${device_path} 1

sleep 2

echo ""
echo "[STEP 3 OF 3] Expanding filesystem"
xfs_growfs -d ${mount_point}