Re: [php-weathermap] Variable link name

[Howard Jones <howie@xxxxxxxxxx>]

On 22/06/2010 10:45, Hervé Donati wrote:
> Hello,
>
> My purpose is to create a map for VMware virtualization.
> As an example, let us say that we have 2 ESX called "esx1" and "esx2"
> and one VM called "vm". These are nodes in my map.
> This VM is sometimes moved from one ESX to the other.
> One data source (no_vm) is able to give me the current esx's number, 1
> or 2.
> I would like to make the link change when current esx changes.
> I tried something like :
>
> LINK esx-vm
>     WIDTH 2
>     OUTCOMMENT esx{link:this:bandwidth_in}
>     TARGET
> gauge:/var/www/html/cacti08/rra/vcenter_no_vm_12281.rrd:no_vm:-
>     NODES vm esx{link:this:bandwidth_in}
>
> But get :
>
> Unknown node 'esx{link:this:bandwidth_in}' on line 206 of config
>
> I also tried variable width (in fact 0 or no_vm), same kind of error.
> If I try NODES vm esx1 with the OUTCOMMENT like upwards, the
> OUTCOMMENT is OK on the map (ie esx1 ou esx2)...
> Is there a way to realize this ? I know it is not something very usual...
>

No - the {} tokens are resolved much later than when node names are
checked (which is while the config is initially parsed). {} tokens are
mainly available in places where a string is normally used (targets,
titles, captions, urls) and not where a number or a 'thing' (node/link) is.

I suppose it doesn't actually *have* to check the node names until it's
time to draw links... it would also allow some flexibility in link
templates that isn't there at the moment.

Howver, I think it would be better to make it more clear how this stuff
works, rather than complicate it some more :-) But on the other hand, it
would be neat to be able to do what you want.