RFC #1: System wide message about DIRAC outage

Author: M.Sapunov

Created: 12.02.2012

The information about DIRAC outage should be displayed both in command line tools and in web portal. Might be send to the DIRAC users' mailing address. For example, if MySQL service used for WorkloadManagemnet is on maintenance the appropriate message should be displayed on JobMonitor page but also as output of dirac-wms-job-submit or any other command contacting the affected service. Technically it could be done as a file with the message on service side. So a service checks for presence of this file and if the file is exists then returns the file's content upon any request not doing anything else.