How to define a macro on a filesystem level

[ohmer]

Hello,

I have a template with a file system discovery. On this file system discovery I have a trigger if available space is less than ${MACRO}%.

I can define my macro on host level and it's work fine.

Problem is I want to set a different value for one file system only. Say I want it trigger at <20% for the host but only at <10% for one specific file system.

I didn't find any way to define my macro on a filesystem level.

Is it possible?

Thank you.

[ohmer]

Not doable?

[chojin]

As far as I know, defining the macro on filesystem level is indeed not possible. You could try constructing a trigger expression which will dynamically check against the correct macro depending on the value of a related item or {#variable} returned by a custom discovery script. (in a similar was as it is done for handling hysteresis in the manual: https://www.zabbix.com/documentation...ion#hysteresis)

On the other hand if you choose to create a custom discovery script, it may be even be easier to have your script "generate" a variable with the wanted %-free in (calculated by or explicitly defined in your discovery script).
For example, a discovery script returning:

{
  "data":[
 
  { "{#FSNAME}":"\/",     "{#FSTYPE}":"ext3",  "{#FSMAXFREE}:"10"},
  { "{#FSNAME}":"\/home", "{#FSTYPE}":"ext3",  "{#FSMAXFREE}:"15"},
  { "{#FSNAME}":"\/tmp",  "{#FSTYPE}":"tmpfs", "{#FSMAXFREE}:"5" },
  { "{#FSNAME}":"\/usr",  "{#FSTYPE}":"ext3",  "{#FSMAXFREE}:"20"},
  { "{#FSNAME}":"\/var",  "{#FSTYPE}":"ext3",  "{#FSMAXFREE}:"10"},
  
  ]
}

Would enable you to create a trigger prototype like this:

Name: Free disk space on {HOST.NAME} is less than {#FSMAXFREE}% on volume {#FSNAME}
Expression: 
{vfs.fs.size[{#FSNAME},pfree].last()}>{#FSMAXFREE}