[root@localhost ~]# cat /usr/lib/systemd/system/swappiness_fix.service
[Unit]
Description=Set all existing -v1 memory cgroups to global vm.swappiness
After=systemd-sysctl.service

[Service]
Type=oneshot
ExecStart=/usr/bin/cgroup_swappiness_set.sh

[Install]
WantedBy=multi-user.target