Comment 5 for bug 1433243

It is possible to change default timestamp in the system logs (messages, auth.log, cron.log, daemon.log, debug, kern.log, syslog) and in the *-all.log (nova-all.log, glance-all.log, neutron-all.log and others) by adding "$ActionFileDefaultTemplate RSYSLOG_FileFormat" line in the each config file of rsyslog.d/. But I don't think that it is a good and full decision.