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
Received on Wed May 13 14:05:17 2009