Re: [Shinken-devel] New configuration features : service template on host template, and service generator

[nap <nap...@gm...>]

On Fri, Nov 5, 2010 at 3:29 PM, Aurelien Degremont <
aur...@ce...> wrote:

> nap a écrit :
> >
> > Now with the last commit, you can have a sort of key generator :
> > define host {
> >    host_name   SuperSwitch
> >    [...]
> >    _ports     Unit [1-6] Port [1-48]
> > }
> >
> > ...
> >
> > And that's all :)
> >
> > Quite cool isn't it? :)
> >
> > I think the only part of IT where this is useful is for this port thing
> > of switches/routers. But it will save quite a lot of configuration lines
> > I think :)
>
> I was looking for this closely since you were working on generators.
> I've got full-featured Python code to manipulate ranges.
>
> In fact, this feature is not usefull only for switches/routers, it is near
> mandatory for HPC clusters.
> We are setting up a 4300-nodes clusters, and you can imagine what that mean
> declaring more than 4000 servers in
> Nagios-like configuration files :), with all this node near the same.
>
> We are using nodesets to point to them.
>  nodes[1-4000] is really common for us.
> We can use quite complex node range description like :
>  nodes[1-400,489,568,600-800/3]
>
> And even operation between them like:
>  foo[1-50],bar[1-5],qui
>
>  foo[1-50]&foo[45-60] => foo[45-50]
>  foo[1-50]!foo[45-60] => foo[1-45]
>  foo[1-50]^foo[45-60] => foo[1-45,51-60]
>
> And you could manipulate this easily in Python
>
>  for node in NodeSet("foo[1-50]^foo[45-60]):
>     iters => foo1 foo2 foo3 ...
>
>  if "foo4" in nodeset:
>    ...
>
>
> I do not know what's your code for handling such ranges but maybe NodeSet
> could be interesting for you?
>
Oh yes! It's quite interesting. Not only for the service generator, but for
the host generator proposed by Hermann Lauer!!

So in fact you can generate hosts by using a template like:

define host{
   register 0
   use LinuxNode,WebNode,etc (so here you can "call" the service/properties
you want
   duplicate_foreach   nodes[1-400,489,568,600-800/3]
}

Then you generate with this all your ~480 hosts in a single template!

First let add the "simple" [X-Y]then we can start the more complex /3 or & |
:p

Thanks a lot for this idea. This will help quite a lot cluster managers :p

Let's code it :)
(Now I already got the hard regexp/parsing part, it's will be quite more
simple :p)


Jean


>
>
> --
> Aurelien Degremont
>
>
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