
# OpenBSD by Zabbix agent

## Overview

This is an Official OpenBSD template. It requires Zabbix agent 7.0 or newer.

#### Notes on filesystem (FS) discovery:
- The ext4/3/2 FS reserves space for privileged usage, typically set at 5% by default.
- BTRFS allocates a default of 10% of the volume for its own needs.
- To mitigate potential disasters, FS usage triggers are based on the maximum available space.
  - Utilization formula: `pused = 100 - 100 * (available / total - free + available)`
- The FS utilization chart, derived from graph prototypes, reflects FS reserved space as the difference between used and available space from the total volume.


## Requirements

Zabbix version: 7.0 and higher.

## Tested versions

This template has been tested on:
- OpenBSD

## Configuration

> Zabbix should be configured according to the instructions in the [Templates out of the box](https://www.zabbix.com/documentation/7.0/manual/config/templates_out_of_the_box) section.

## Setup

Install Zabbix agent on OpenBSD according to Zabbix documentation.


### Macros used

|Name|Description|Default|
|----|-----------|-------|
|{$AGENT.TIMEOUT}|<p>Timeout after which the agent is considered unavailable. Works only for agents reachable from Zabbix server/proxy (in passive mode).</p>|`3m`|
|{$VFS.FS.FSNAME.NOT_MATCHES}|<p>Used for filesystem discovery. Can be overridden on the host or linked template level.</p>|`^(/dev\|/sys\|/run\|/proc\|.+/shm$)`|
|{$VFS.FS.FSNAME.MATCHES}|<p>Used for filesystem discovery. Can be overridden on the host or linked template level.</p>|`.+`|
|{$VFS.FS.FSTYPE.MATCHES}|<p>Used for filesystem discovery. Can be overridden on the host or linked template level.</p>|`Macro too long. Please see the template.`|
|{$VFS.FS.FSTYPE.NOT_MATCHES}|<p>Used for filesystem discovery. Can be overridden on the host or linked template level.</p>|`^\s$`|
|{$VFS.FS.INODE.PFREE.MIN.CRIT}|<p>The critical threshold of the filesystem metadata utilization.</p>|`10`|
|{$VFS.FS.INODE.PFREE.MIN.WARN}|<p>The warning threshold of the filesystem metadata utilization.</p>|`20`|
|{$VFS.FS.PUSED.MAX.CRIT}|<p>The critical threshold of the filesystem utilization.</p>|`90`|
|{$VFS.FS.PUSED.MAX.WARN}|<p>The warning threshold of the filesystem utilization.</p>|`80`|

### Items

|Name|Description|Type|Key and additional info|
|----|-----------|----|-----------------------|
|Maximum number of opened files|<p>May be increased by using the `sysctl` utility or modifying the file `/etc/sysctl.conf`.</p>|Zabbix agent|kernel.maxfiles|
|Maximum number of processes|<p>May be increased by using the `sysctl` utility or modifying the file `/etc/sysctl.conf`.</p>|Zabbix agent|kernel.maxproc|
|Number of running processes|<p>The number of processes in a running state.</p>|Zabbix agent|proc.num[,,run]|
|Number of processes|<p>The total number of processes in any state.</p>|Zabbix agent|proc.num[]|
|Host boot time||Zabbix agent|system.boottime|
|Interrupts per second|<p>Number of interrupts processed.</p>|Zabbix agent|system.cpu.intr<p>**Preprocessing**</p><ul><li>Change per second: </li></ul>|
|Processor load (1 min average per core)|<p>Calculated as the system CPU load divided by the number of CPU cores.</p>|Zabbix agent|system.cpu.load[percpu,avg1]|
|Processor load (5 min average per core)|<p>Calculated as the system CPU load divided by the number of CPU cores.</p>|Zabbix agent|system.cpu.load[percpu,avg5]|
|Processor load (15 min average per core)|<p>Calculated as the system CPU load divided by the number of CPU cores.</p>|Zabbix agent|system.cpu.load[percpu,avg15]|
|Context switches per second|<p>The combined rate at which all processors on the computer are switched from one thread to another.</p>|Zabbix agent|system.cpu.switches<p>**Preprocessing**</p><ul><li>Change per second: </li></ul>|
|CPU idle time|<p>Time the CPU has spent doing nothing.</p>|Zabbix agent|system.cpu.util[,idle]|
|CPU interrupt time|<p>Time the CPU has spent servicing hardware interrupts.</p>|Zabbix agent|system.cpu.util[,interrupt]|
|CPU nice time|<p>Time the CPU has spent running users' processes that have been niced.</p>|Zabbix agent|system.cpu.util[,nice]|
|CPU system time|<p>Time the CPU has spent running the kernel and its processes.</p>|Zabbix agent|system.cpu.util[,system]|
|CPU user time|<p>Time the CPU has spent running users' processes that are not niced.</p>|Zabbix agent|system.cpu.util[,user]|
|Host name|<p>The host name of the system.</p>|Zabbix agent|system.hostname<p>**Preprocessing**</p><ul><li><p>Discard unchanged with heartbeat: `1d`</p></li></ul>|
|Host local time|<p>The local system time of the host.</p>|Zabbix agent|system.localtime|
|Free swap space|<p>The free space of the swap volume/file expressed in bytes.</p>|Zabbix agent|system.swap.size[,free]|
|Free swap space in %|<p>The free space of the swap volume/file expressed in %.</p>|Zabbix agent|system.swap.size[,pfree]|
|Total swap space|<p>Total space of the swap volume/file expressed in bytes.</p>|Zabbix agent|system.swap.size[,total]|
|System information|<p>Information as normally returned by `uname -a`.</p>|Zabbix agent|system.uname<p>**Preprocessing**</p><ul><li><p>Discard unchanged with heartbeat: `1d`</p></li></ul>|
|System uptime||Zabbix agent|system.uptime|
|Number of logged in users|<p>The number of users who are currently logged in.</p>|Zabbix agent|system.users.num|
|Checksum of /etc/passwd||Zabbix agent|vfs.file.cksum[/etc/passwd,sha256]<p>**Preprocessing**</p><ul><li><p>Discard unchanged with heartbeat: `1h`</p></li></ul>|
|Available memory|<p>Defined as free + cached + buffers.</p>|Zabbix agent|vm.memory.size[available]|
|Total memory|<p>Total memory expressed in bytes.</p>|Zabbix agent|vm.memory.size[total]|
|Version of Zabbix agent running||Zabbix agent|agent.version<p>**Preprocessing**</p><ul><li><p>Discard unchanged with heartbeat: `1d`</p></li></ul>|
|Host name of Zabbix agent running||Zabbix agent|agent.hostname<p>**Preprocessing**</p><ul><li><p>Discard unchanged with heartbeat: `1d`</p></li></ul>|
|Zabbix agent ping|<p>The agent always returns "1" for this item. May be used in combination with `nodata()` for the availability check.</p>|Zabbix agent|agent.ping|
|Zabbix agent availability|<p>Used for monitoring the availability status of the agent.</p>|Zabbix internal|zabbix[host,agent,available]|
|Get filesystems|<p>The `vfs.fs.get` key acquires raw information set about the filesystems. Later to be extracted by preprocessing in dependent items.</p>|Zabbix agent|vfs.fs.get|

### Triggers

|Name|Description|Expression|Severity|Dependencies and additional info|
|----|-----------|----------|--------|--------------------------------|
|Configured max number of opened files is too low on {HOST.NAME}||`last(/OpenBSD by Zabbix agent/kernel.maxfiles)<1024`|Info||
|Configured max number of processes is too low on {HOST.NAME}||`last(/OpenBSD by Zabbix agent/kernel.maxproc)<256`|Info||
|Too many processes running on {HOST.NAME}||`avg(/OpenBSD by Zabbix agent/proc.num[,,run],5m)>30`|Warning||
|Too many processes on {HOST.NAME}||`avg(/OpenBSD by Zabbix agent/proc.num[],5m)>300`|Warning||
|Processor load is too high on {HOST.NAME}||`avg(/OpenBSD by Zabbix agent/system.cpu.load[percpu,avg1],5m)>5`|Warning||
|Hostname was changed on {HOST.NAME}||`last(/OpenBSD by Zabbix agent/system.hostname,#1)<>last(/OpenBSD by Zabbix agent/system.hostname,#2)`|Info||
|Lack of free swap space on {HOST.NAME}|<p>It probably means that the systems requires more physical memory.</p>|`last(/OpenBSD by Zabbix agent/system.swap.size[,pfree])<50`|Warning||
|Host information was changed on {HOST.NAME}||`last(/OpenBSD by Zabbix agent/system.uname,#1)<>last(/OpenBSD by Zabbix agent/system.uname,#2)`|Info||
|{HOST.NAME} has just been restarted||`change(/OpenBSD by Zabbix agent/system.uptime)<0`|Info||
|/etc/passwd has been changed on {HOST.NAME}||`last(/OpenBSD by Zabbix agent/vfs.file.cksum[/etc/passwd,sha256],#1)<>last(/OpenBSD by Zabbix agent/vfs.file.cksum[/etc/passwd,sha256],#2)`|Warning||
|Lack of available memory on server {HOST.NAME}||`last(/OpenBSD by Zabbix agent/vm.memory.size[available])<20M`|Average||
|Zabbix agent is not available|<p>For passive checks only; the availability of the agent(s) and a host is used with `{$AGENT.TIMEOUT}` as the time threshold.</p>|`max(/OpenBSD by Zabbix agent/zabbix[host,agent,available],{$AGENT.TIMEOUT})=0`|Average|**Manual close**: Yes|

### LLD rule Network interface discovery

|Name|Description|Type|Key and additional info|
|----|-----------|----|-----------------------|
|Network interface discovery|<p>Used for the discovery of network interfaces.</p>|Zabbix agent|net.if.discovery|

### Item prototypes for Network interface discovery

|Name|Description|Type|Key and additional info|
|----|-----------|----|-----------------------|
|Interface {#IFNAME}: Incoming network traffic||Zabbix agent|net.if.in[{#IFNAME}]<p>**Preprocessing**</p><ul><li>Change per second: </li><li><p>Custom multiplier: `8`</p></li></ul>|
|Interface {#IFNAME}: Outgoing network traffic||Zabbix agent|net.if.out[{#IFNAME}]<p>**Preprocessing**</p><ul><li>Change per second: </li><li><p>Custom multiplier: `8`</p></li></ul>|

### LLD rule Mounted filesystem discovery

|Name|Description|Type|Key and additional info|
|----|-----------|----|-----------------------|
|Mounted filesystem discovery|<p>The discovery of mounted filesystems with different types.</p>|Dependent item|vfs.fs.dependent.discovery<p>**Preprocessing**</p><ul><li><p>JavaScript: `The text is too long. Please see the template.`</p></li><li><p>Discard unchanged with heartbeat: `1h`</p></li></ul>|

### Item prototypes for Mounted filesystem discovery

|Name|Description|Type|Key and additional info|
|----|-----------|----|-----------------------|
|FS [{#FSNAME}]: Get data|<p>Intermediate data of `{#FSNAME}` filesystem.</p>|Dependent item|vfs.fs.dependent[{#FSNAME},data]<p>**Preprocessing**</p><ul><li><p>JSON Path: `$.[?(@.fsname=='{#FSNAME}')].first()`</p></li></ul>|
|FS [{#FSNAME}]: Option: Read-only|<p>The filesystem is mounted as read-only. It is available only for Zabbix agents 6.4 and higher.</p>|Dependent item|vfs.fs.dependent[{#FSNAME},readonly]<p>**Preprocessing**</p><ul><li><p>JSON Path: `$.options`</p><p>⛔️Custom on fail: Discard value</p></li><li><p>Regular expression: `(?:^|,)ro\b 1`</p><p>⛔️Custom on fail: Set value to: `0`</p></li></ul>|
|FS [{#FSNAME}]: Inodes: Free, in %|<p>Free metadata space expressed in %.</p>|Dependent item|vfs.fs.dependent.inode[{#FSNAME},pfree]<p>**Preprocessing**</p><ul><li><p>JSON Path: `$.inodes.pfree`</p></li></ul>|
|FS [{#FSNAME}]: Space: Available|<p>Available storage space expressed in bytes.</p>|Dependent item|vfs.fs.dependent.size[{#FSNAME},free]<p>**Preprocessing**</p><ul><li><p>JSON Path: `$.bytes.free`</p></li></ul>|
|FS [{#FSNAME}]: Space: Available, in %|<p>Deprecated metric.</p><p>Space availability expressed as a percentage, calculated using the current and maximum available spaces.</p>|Dependent item|vfs.fs.dependent.size[{#FSNAME},pfree]<p>**Preprocessing**</p><ul><li><p>JSON Path: `$.bytes.pfree`</p></li></ul>|
|FS [{#FSNAME}]: Space: Used, in %|<p>Calculated as the percentage of currently used space compared to the maximum available space.</p>|Dependent item|vfs.fs.dependent.size[{#FSNAME},pused]<p>**Preprocessing**</p><ul><li><p>JSON Path: `$.bytes.pused`</p></li></ul>|
|FS [{#FSNAME}]: Space: Total|<p>Total space expressed in bytes.</p>|Dependent item|vfs.fs.dependent.size[{#FSNAME},total]<p>**Preprocessing**</p><ul><li><p>JSON Path: `$.bytes.total`</p></li></ul>|
|FS [{#FSNAME}]: Space: Used|<p>Used storage expressed in bytes.</p>|Dependent item|vfs.fs.dependent.size[{#FSNAME},used]<p>**Preprocessing**</p><ul><li><p>JSON Path: `$.bytes.used`</p></li></ul>|

### Trigger prototypes for Mounted filesystem discovery

|Name|Description|Expression|Severity|Dependencies and additional info|
|----|-----------|----------|--------|--------------------------------|
|FS [{#FSNAME}]: Filesystem has become read-only|<p>The filesystem has become read-only, possibly due to an I/O error. Available only for Zabbix agents 6.4 and higher.</p>|`last(/OpenBSD by Zabbix agent/vfs.fs.dependent[{#FSNAME},readonly],#2)=0 and last(/OpenBSD by Zabbix agent/vfs.fs.dependent[{#FSNAME},readonly])=1`|Average|**Manual close**: Yes|
|FS [{#FSNAME}]: Running out of free inodes|<p>Disk writing may fail if index nodes are exhausted, leading to error messages like "No space left on device" or "Disk is full", despite available free space.</p>|`min(/OpenBSD by Zabbix agent/vfs.fs.dependent.inode[{#FSNAME},pfree],5m)<{$VFS.FS.INODE.PFREE.MIN.CRIT:"{#FSNAME}"}`|Average||
|FS [{#FSNAME}]: Running out of free inodes|<p>Disk writing may fail if index nodes are exhausted, leading to error messages like "No space left on device" or "Disk is full", despite available free space.</p>|`min(/OpenBSD by Zabbix agent/vfs.fs.dependent.inode[{#FSNAME},pfree],5m)<{$VFS.FS.INODE.PFREE.MIN.WARN:"{#FSNAME}"}`|Warning|**Depends on**:<br><ul><li>FS [{#FSNAME}]: Running out of free inodes</li></ul>|
|FS [{#FSNAME}]: Space is critically low|<p>The volume's space usage exceeds the `{$VFS.FS.PUSED.MAX.CRIT:"{#FSNAME}"}%` limit.<br>The trigger expression is based on the current used and maximum available spaces.<br>Event name represents the total volume space, which can differ from the maximum available space, depending on the filesystem type.</p>|`min(/OpenBSD by Zabbix agent/vfs.fs.dependent.size[{#FSNAME},pused],5m)>{$VFS.FS.PUSED.MAX.CRIT:"{#FSNAME}"}`|Average|**Manual close**: Yes|
|FS [{#FSNAME}]: Space is low|<p>The volume's space usage exceeds the `{$VFS.FS.PUSED.MAX.WARN:"{#FSNAME}"}%` limit.<br>The trigger expression is based on the current used and maximum available spaces.<br>Event name represents the total volume space, which can differ from the maximum available space, depending on the filesystem type.</p>|`min(/OpenBSD by Zabbix agent/vfs.fs.dependent.size[{#FSNAME},pused],5m)>{$VFS.FS.PUSED.MAX.WARN:"{#FSNAME}"}`|Warning|**Manual close**: Yes<br>**Depends on**:<br><ul><li>FS [{#FSNAME}]: Space is critically low</li></ul>|

## Feedback

Please report any issues with the template at [`https://support.zabbix.com`](https://support.zabbix.com)

You can also provide feedback, discuss the template, or ask for help at [`ZABBIX forums`](https://www.zabbix.com/forum/zabbix-suggestions-and-feedback)

