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
Received on Wed Jun 10 18:54:52 2009