Fix ingress traefik systemd unit

upstream https://review.opendev.org/#/c/705443/

In coreos we have selinux in enforcing. When the systemd unit does not have user and group, and the service type is not simple.

story: 2007210 task: 38609

Change-Id: Ia36a51e62b3dab97faf3ce58a218441bd93e77e9 Signed-off-by: Spyros Trigazis spyridon.trigazis@cern.ch

magnum/drivers/common/templates/kubernetes/fragments/enable-ingress-traefik.sh

@@ -181,8 +181,10 @@ INGRESS_TRAEFIK_SERVICE_CONTENT='''[Unit]
 Requires=kube-apiserver.service
 
 [Service]
-Type=oneshot
-Environment=HOME=/root
+User=root
+Group=root
+Type=simple
+Restart=on-failure
 EnvironmentFile=-/etc/kubernetes/config
 ExecStart='''${INGRESS_TRAEFIK_BIN}'''