[Nagiosplug-devel] additional function for check_disk [Virus checked]

[Andreas Ericsson]

Matthias.Eble at kaufland.de wrote:
> Hi list,
> 
>  at the moment, check_disk returns a state != STATE_OK if any of the 
> monitored filesystems has less than -w or -c freespace.
> 
> In our case, this doesn't meet our needs, since our Oracle databases use 
> more than just one filesystem to store their data.
> So if there are n data-volumes available, it doesn't matter if one or n-1 
> volumes get filled 100% as long as one volume remains beyond
> the warning level. 
> 
> I've got three approaches for solve this problem.
> 
> First: 
> Introduce an option like -g (--group) followed by a comma_seperated_list 
> of partitions/lvols/mountpoints which are to group.
>  

Probably the cleanest solution, or possibly to add check_disk_group as 
its own command.

> 
> Second:
> Use a own nrpe command for every group of filesystems and introduce a flag 
> like -g (in addition to multiple -p options) to tell check_disk to return 
> warn/error if all
> filesystems monitored by this command get full
> 
> Third:
> Build an ugly shellscript which executes check_disk for every 
> datafilesystem and return != 0 if all of these checks return !=0.
> 

Shell is good for prototyping, but the functionality would be equivalent 
to that of check_cluster (or check_cluster2, I can't remember).

> 
> A further parameter could be sth like minimum_filesystems_ok to decide if 
> the state is ok if 1,2,3,... filesystems of a group have more than -w/-c 
> free space.
> 
> 
> What do you think about it?

Hack away. A clean patch is almost certain to be included upstream.

> Is the check_disk plugin is the right place to reproduce a functionality 
> like this.
> 
> Does anybody know applications like Oracle which use more than one 
> filesystems for the same purpose?
> 

Samba and various ftp servers in different setups. I'm sure there are 
more scenarios where this can be interesting.

-- 
Andreas Ericsson                   andreas.ericsson at op5.se
OP5 AB                             www.op5.se
Lead Developer