[Unit]
Description=Formats /dev/xvdb
Before=dbus.service docker.service
After=ebs-nvme-udev-trigger.service dev-xvdb.device
Wants=ebs-nvme-udev-trigger.service dev-xvdb.device
DefaultDependencies=no
[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/bash -c '(blkid -t TYPE=ext4 /dev/xvdb) || (/usr/sbin/mkfs.ext4 -F /dev/xvdb)'