On Wed, 2009-06-10 at 19:54 +0200, Dennis Roos wrote: > John A. Sullivan III wrote: > > On Wed, 2009-05-13 at 08:05 -0500, Michael S. Zick wrote: > > > >> On Wed May 13 2009, John A. Sullivan III wrote: > >> > >>> On Wed, 2009-05-13 at 07:44 -0500, Michael S. Zick wrote: > >>> > >>>> On Wed May 13 2009, John A. Sullivan III wrote: > >>>> > >>>>> Hello, all. We are having a problem with graceful shutdown of our > >>>>> vservers. For example, one of our vservers is a Zimbra email system. > >>>>> It is set to start and stop as part of vservers-default. Since email > >>>>> systems can take quite a while to shut down, we created > >>>>> a /etc/vservers/zimbra1/apps/vshelper/sync-timeout file and with > >>>>> contents of: > >>>>> 900 > >>>>> > >>>>> However, if we shutdown the vserver host, e.g., halt -p, we notice the > >>>>> default server shutdown is very fast - much too fast to be adequate for > >>>>> Zimbra. As a result, when the server reboots, we have serious damage to > >>>>> the email database. > >>>>> > >>>>> Other than some kludge such as inserting a long sleep sequence in a > >>>>> shutdown script, is there an elegant way of giving the vservers adequate > >>>>> time to shut down when the host is shut down? Thanks - John > >>>>> > >>>>> > >>>> Would it be possible to make the e-mail server send you (system root) a > >>>> "I am dead" e-mail as the last action in closing out the pending mail files? > >>>> Or maybe "watch" for its pid file to disappear? > >>>> > >>>> Mike > >>>> > >>>> > >>>> > >>> That's a good idea; we could create a script in the shutdown sequence > >>> that will sleep as long as the pid exists. But I wonder if there is > >>> something built into vserver that I missed which would create a more > >>> graceful shutdown. I thought that's what sync-timeout does but I must > >>> have guessed wrongly! Thanks - John > >>> > >> The utility library, libevent, should let you write a "Goodbye World" style > >> program that will block until the pid file disappears. > >> > >> Mike > >> > >> > >> > > Thanks again. The downside is I must do this for each vserver. I'm > > hoping there is something within vserver which will do this for all > > vservers automatically, this being shut them down gracefully. If not, > > we will resort to your very helpful suggestion - John > > > Hope this isn't too late... recently got back in touch with vservers, so > wandering through the mailing list ;) > > I guess you could use /etc/vservers/.defaults/scripts/pre-stop to use to > stop zimbra before anything else. > > > Hope that helps, > Dennis Thanks. Ultimately, this did not appear to be a shutdown problem. Rather, it was related to the problem we uncovered regarding Zimbra, MySQL/InnoDB, and hashify. All appears to be working now - John -- John A. Sullivan III Open Source Development Corporation +1 207-985-7880 jsullivan@opensourcedevel.com http://www.spiritualoutreach.com Making Christianity intelligible to secular society