Azure VM wait for disk attachement.

wait_for_volume.sh

#!/bin/bash
# wait for an azure disk attachment to happen.

set -e

disk="${1}"
disk_partition="${disk}-part1"
vg="${2}"
vol="${3}"
mount_point="${4}"

# Wait for x disks to be available
while ! ls "${disk}"
do
    echo "waiting on disks..."
    sleep 5
done

if [[ -L "${disk_partition}" ]]
then
    echo "-- Found existing partition, will not format"
else
    echo "-- Partition disk"
    echo 'type=83' | sudo sfdisk /dev/disk/azure/scsi1/lun1

    echo "-- Create physical volume"

    while ! ls "${disk_partition}"
    do
        echo "waiting on partition..."
        sleep 5
    done

    pvcreate "${disk_partition}"

    echo "-- Create volume group"
    if ! grep -q "$(vgs | grep "${vg}")"
    then
        vgcreate "${vg}" "${disk_partition}"
    else
        vgextend "${vg}" "${disk_partition}"
    fi

    echo "-- Create logical volume"
    lvcreate -l "100%FREE" -n "${vol}" "${vg}"

    echo "-- Create filesystem"
    mkfs.ext3 -m 0 "/dev/${vg}/${vol}"
fi

echo "-- add to fstab"
echo "/dev/${vg}/${vol} ${mount_point} ext3 defaults 0  2" >> /etc/fstab

echo "-- Create mount point"
mkdir -p "${mount_point}"

echo "-- Mount volume"
mount "/dev/${vg}/${vol}" "${mount_point}"