Re: [Zabbix-users] create dependencies on autodiscovery

[Shane M. <sh...@mc...>]

On 18/05/15 14:54, Ronald Schouw wrote:
> Hi,
> 
> This is not a big issue.
> Can anyone tell how to create a dependency with autodiscovery ?
> We get two messages in the monitoring screen
> 
> 
> 	Disk - Free disk space 10% low on volume /backup
> 
> and
> 
> 	Disk - Free disk space 5% low on volume /backup
> 
> It is the same filesystem, we do not want to get the messages on 10%
> low, because the messages 5 % is allready there.
> Anyone has a sollution ?

You don't need dependency, you simply need to add more logic in your
trigger prototypes. Something like this on the 10% trigger:

{Template OS Linux:vfs.fs.size[{#FSNAME},pfree].last(0)}<10 and
{Template OS Linux:vfs.fs.size[{#FSNAME},pfree].last(0)}>=5

And this on your 5% trigger:

{Template OS Linux:vfs.fs.size[{#FSNAME},pfree].last(0)}<5

I used to have this but I found that when my filesystem was hovering
around 5% I would end up with lots of alerts clearing the 10% and
triggering the 5% then clearing the 5% and triggering the 10%. I tried
adding hysteresis but couldn't get it to work satisfactorily. It got
very annoying. Also, for users not experienced with the system it might
be confusing seeing the 10% alert clear and then receive a 5% alert. So
I ended up leaving the 10% triggered even if the 5% is also triggered.

And don't even get me started on how useless percentage triggers are on
100TB filesystems . . . :-)

Shane.