Re: [Xen-users] xend, xenstored, xenconsoled restart

[Ferenc Wagner <wferi@xxxxxxx>]

John Levon <levon@xxxxxxxxxxxxxxxxx> writes:

> On Tue, Oct 21, 2008 at 11:50:28PM +0200, Ferenc Wagner wrote:
>
>> I'm looking for some definite info about when it's allowed to restart
>> the various Xen daemons (xend, xenstored and xenconsoled).
>
> You cannot restart xenstored at all, it will break basic functionality.
> The other two can often be restarted but will cause issues sometimes.
>
> You can't restart any qemu-dm processes.

Tim Post <echo@xxxxxxxxxxxx> writes:

> On Tue, 2008-10-21 at 23:50 +0200, Ferenc Wagner wrote:
> 
>> I'm looking for some definite info about when it's allowed to restart
>> the various Xen daemons (xend, xenstored and xenconsoled).
>> 
>> Up to now I worked with the assumption that I can restart them while
>> guest domains are running on the host and there's no harm done.
>> Indeed there wasn't, until now, when on restart one of my domains
>> became Domain-Unnamed (but kept on working), while the others
>> disappeared and didn't ping anymore...
>> 
>> (I've got the domain info dump from xm dmesg and the xend logs if
>> anybody can debug this.  I'm using Xen 3.2.1.)
>
> One thing you never (ever) want to re-start is xenstored. Xend however
> can usually be re-started without issue.

Thanks both of you for the quick and detailed answers!

> In all reality, I have seen xend crash, but never xenstored. The only
> practical reason for including stuff to dump and re-import its contents
> would be a graceful restart .. but why would you re-start it if its
> running fine? :)

Because I upgraded it or a library used by it. :)
-- 
Cheers,
Feri.

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