Trigger when Filesystem is not discovered anymore

[Amiram]

Hey,

I'm very new at Zabbix and I wondered if there is any way to trigger an alert when a File-System is no longer discovered by the Mount LLD rule.

I have mounted FS on my Linux server at `/data` and I want to get an alert once it is unmounted.

How can I achieve this?
And can I filter out "not interesting" FS?

Amiram

[gofree]

Hi

to check if FS is still mounted - check some particular file/folder presence in it - example: vfs.file.exists[file,<types_incl>,<types_excl>]. I don't remeber a way to trigger an alert on "not anymore discovered FS", but I did the easy way ( check for file/folder existence - also custom user parameter can applied for more complicated check)
https://www.zabbix.com/documentation...s/zabbix_agent

for filtering check FILTER section in docu

https://www.zabbix.com/documentation/current/manual/discovery/low_level_discovery#filter

[Amiram]

Thank you gofree

I suppose that will work the same for "normal" mount point like cifs/fuse etc...
There is no "pretty" way of doing it?
like:
vfs.mount.is_mounted for example:

I noticed that I can create UserParameter for custom scripts.
Correct me if I'm wrong here, that UserParameter just "export/expose" data from the local host and the server is responsible to gather it and create triggers according to that data.
Now,
I can create UserParamater as follow:

UserParameter=vfs.mount.is_mounted,mountpoint -q $1

And at the server side create a items with a key (for example) vfs.mount.is_mounted[/mnt/example] and maybe create a trigger as well.

This will do the work?

Amiram

[gofree]

Hi

Useraparameters are just another way how to collect data , all the other steps needs to be done in zabbix gui ( items, triggers, etc )

https://www.zabbix.com/documentation/current/manual/config/items/userparameters

Your userparamter will not work ( 2 reasons ) - see the docu
missed[*]
-q parameter is silent - will not print anything


this might work

UserParameter=vfs.mount.is_mounted[*],mountpoint  $1

example ( you can check for string "is not a mountpoint" or play further with preprocessing to get smaller data footprint ):

[root@host gofree]# umount /mnt/usb_ext_backup
[root@host gofree]# mountpoint /mnt/usb_ext_backup
/mnt/usb_ext_backup is not a mountpoint
[root@host gofree]# mount /mnt/usb_ext_backup
[root@host gofree]# mountpoint /mnt/usb_ext_backup
/mnt/usb_ext_backup is a mountpoint
[root@host gofree]# mountpoint -q /mnt/usb_ext_backup

last line goes silent with -q