[collectd] [PATCH] UUID plugin for collectd
octo at verplant.org
Mon Nov 5 20:25:38 CET 2007
Hi Rich ;)
On Mon, Nov 05, 2007 at 05:03:40PM +0000, Richard W.M. Jones wrote:
> What it does is, if the plugin is loaded, it changes the global
> hostname_g to be the machine's UUID, where the UUID is a (supposedly)
> unique identifier for the machine.
Wow, I never would have thought of this ;)
> However this is most often useful for virtual guests, where we have a
> concept of a UUID that refers to the guest for all time, even if the
> guest is shutdown or migrated to another physical host.
Just out of curiosity: Why don't hostnames work for you?
> The plugin uses a variety of different methods to try to find the
Could you please document these methods and the available configuration
options in `src/collectd.conf.pod'? The it's in the ``plain old
documentation'' format (used by Perl, see perlpod(1)) - the manpages are
generated from this.
> I don't really know whether updating hostname_g directly is a good
> idea. No other plugins do it, but on the other hand it does seem to
As long as you're doing this in the `init' hook (which is the case ;) it
shouldn't be a problem.
Your patch looks fine as far as I've seen it. These lines should be
-- 8< --
/* from */
strncpy (hostname_g, uuid, DATA_MAX_NAME_LEN);
/* to */
strncpy (hostname_g, uuid, sizeof (hostname_g));
hostname_g[sizeof (hostname_g) - 1] = '\0';
-- >8 --
(I rather have an useless instruction in there than wondering if `uuid'
is short enough in any possible case in two years time..)
Florian octo Forster
Hacker in training
-------------- next part --------------
A non-text attachment was scrubbed...
Size: 2567 bytes
Desc: not available
Url : http://mailman.verplant.org/pipermail/collectd/attachments/20071105/9c09fbc0/attachment.bin
More information about the collectd