Run elemental-register in systemd service

Signed-off-by: David Cassany <dcassany@suse.com>

.obs/specfile/elemental.spec

@@ -77,18 +77,22 @@ rm -rf %{buildroot}/usr/libexec/.placeholder
 %pre
 %service_add_pre elemental-populate-node-labels.service
 %service_add_pre shutdown-containerd.service
+%service_add_pre elemental-register.service
 
 %post
 %service_add_post elemental-populate-node-labels.service
 %service_add_post shutdown-containerd.service
+%service_add_post elemental-register.service
 
 %preun
 %service_del_preun elemental-populate-node-labels.service
 %service_del_preun shutdown-containerd.service
+%service_del_preun elemental-register.service
 
 %postun
 %service_del_postun elemental-populate-node-labels.service
 %service_del_postun shutdown-containerd.service
+%service_del_postun elemental-register.service
 
 %files
 %defattr(-,root,root,-)
@@ -104,6 +108,7 @@ rm -rf %{buildroot}/usr/libexec/.placeholder
 %config %{_sysconfdir}/NetworkManager/conf.d/rke2-canal.conf
 %dir %{_unitdir}
 %{_unitdir}/shutdown-containerd.service
+%{_unitdir}/elemental-register.service
 %{_unitdir}/elemental-populate-node-labels.service
 %{_sbindir}/elemental-populate-node-labels
 %dir /usr/libexec

framework/files/system/oem/99_elemental-register.yaml

@@ -4,4 +4,4 @@ stages:
     # run only if on live cd and there is a config file
     - if: '[ -f /run/cos/live_mode ] && [ -f /run/initramfs/live/livecd-cloud-config.yaml ]'
       commands:
-        - systemd-cat -t elemental elemental-register --debug /run/initramfs/live/
+        - systemctl start elemental-register.service

framework/files/usr/lib/systemd/system/elemental-register.service

@@ -0,0 +1,10 @@
+[Unit]
+Description=Elemental Register
+Documentation=https://elemental.docs.rancher.com
+Wants=network-online.target
+After=network-online.target
+
+[Service]
+Type=oneshot
+ExecStart=bash --login -c elemental-register --debug /run/initramfs/live
+