Need to check if the device name is a symbolic link

[gilfreund]

The script checks if the variable has a value, and if this is a block device.
However, names like /dev/xvdb might also be a symbolic link to the actual block device. e.g.

ls -la /dev/xvd*
lrwxrwxrwx 1 root root  7 Dec  8 12:06 /dev/xvda -> nvme0n1
lrwxrwxrwx 1 root root  9 Dec  8 12:06 /dev/xvda1 -> nvme0n1p1
lrwxrwxrwx 1 root root 11 Dec  8 12:06 /dev/xvda128 -> nvme0n1p128
lrwxrwxrwx 1 root root  7 Dec  8 12:22 /dev/xvdba -> nvme2n1
lrwxrwxrwx 1 root root  7 Dec  8 12:25 /dev/xvdbb -> nvme3n1

Not sure if a [[ -h FILE ]] is enough or do we need to check on the target as well.

amazon-ebs-autoscale/install.sh

Line 240 in 521f071

if [ -z "${DEVICE}" ] || [ ! -b "${DEVICE}" ]; then

[gilfreund]

This is following @MikeKroell comment #17 (comment)

[gilfreund]

Turns out to be a configuration issue in my account templates.