[Unit]
Description=Enable/Disable zram swap device
ConditionPathExists=/dev/zram0
ConditionPathExists=/sys/block/zram0

[Service]
Type=oneshot
RemainAfterExit=yes

ExecStart=/bin/sh -c 'echo 2G > /sys/block/zram0/disksize'
ExecStart=/sbin/mkswap /dev/zram0
ExecStart=/sbin/swapon /dev/zram0 -p 10

ExecStop=/sbin/swapoff /dev/zram0
ExecStop=/bin/sh -c 'echo 1 > /sys/block/zram0/reset'

[Install]
WantedBy=multi-user.target