Description of problem:

Setting SYNC_TIME=1 does not work on autostarted guests.  On boot libvirt-guests on the host reports:

Mar 14 05:02:40 vmhost libvirt-guests.sh[2536]: Resuming guests on default URI...
Mar 14 05:02:40 vmhost libvirt-guests.sh[2536]: Resuming guest flexlm: already active

Presumably because libvirtd has already automatically started the guest as it is marked for autostart.  This causes domtime --sync not to be run.

I believe this patch should fix it:

diff --git a/tools/libvirt-guests.sh.in b/tools/libvirt-guests.sh.in
index d5e68e5..5034997 100644
--- a/tools/libvirt-guests.sh.in
+++ b/tools/libvirt-guests.sh.in
@@ -209,9 +209,10 @@ start() {
                     retval run_virsh "$uri" start $bypass "$name" \
                         >/dev/null && \
                     gettext "done"; echo
-                    if "$sync_time"; then
-                        run_virsh "$uri" domtime --sync "$name" >/dev/null
-                    fi
+                fi
+                # Guest may have already been started by libvirtd
+                if "$sync_time"; then
+                    run_virsh "$uri" domtime --sync "$name" >/dev/null
                 fi
             fi
         done

Version-Release number of selected component (if applicable):
libvirt-3.2.0-14.el7_4.9.x86_64