vi /lib/systemd/system/keystone.service

keystone.service

[Unit]
Description=OpenStack Identity service
After=mysql.service postgresql.service slapd.service rabbitmq-server.service ntp.service


[Service]
User=keystone
Group=keystone
Type=simple
WorkingDirectory=/var/lib/keystone
PermissionsStartOnly=true
ExecStartPre=/bin/mkdir -p /var/lock/keystone /var/log/keystone /var/lib/keystone
ExecStartPre=/bin/chown keystone:keystone /var/lock/keystone /var/log/keystone /var/lib/keystone
ExecStart=/etc/init.d/keystone systemd-start
Restart=on-failure
LimitNOFILE=65535
TimeoutStopSec=15

[Install]
WantedBy=multi-user.target