Revision as of 16:39, 17 March 2021 by Tony (talk | contribs)


Zabbix API

Installing from git

git clone
cd zabbix 


Mysql template



Adjust loglevel

zabbix_server --runtime-control log_level_increase=trapper


Zabbix does not support SQLite3 database upgrade.

Stop the proxy and (re)move the .db file

[Z3002] cannot create database 'zabbix_proxy': [0] unable to open database file

fix path


Cannot parse heartbeat from active proxy

TBD, probably name issue


Cannot find host interface on "esxhost" for item key foo

Might mean you're trying to import an SNMP template before configuring SNMP for the host


Agent side ping check

UserParameter=pingtime[*],fping -e $1|sed 's/^.*(\([0-9].*\) ms).*$/\1/g'
UserParameter=pingalive[*],fping $1|grep -q alive;echo $?


IPMI errors

cannot connect to IPMI host: [22] Operation canceled

Usually temporary because of broken ipmi lib, ignore it

cannot connect to IPMI host: [16777411] Unknown error 16777411

another classic


The regular expressions referred to in discovery are found under Administration->General, and then "Regular expressions" in the dropdown at top right of the page

cannot connect to IPMI host: [125] Operation canceled

possibly authentication method issue

Discover: value must be a JSON object

Could mean you need to escape slashes


Cannot create item: Invalid first parameter

Problably a calculated item, try doublequoting the item key:



Install recent zabbix on CentOS/RHEL

rpm -ivh
yum install zabbix-agent

Discovery data example

Output of a discovery script should look like:


Backing up tables

cannot send list of active checks

Most likely ServerActive is defined in agent config, while not used at all

Latest 20 issues

DEFAULT_LATEST_ISSUES_CNT in/usr/share/zabbix/include/

Zabbix unreachable poller processes more than 75% busy

Increase StartPollersUnreachable

More than 100 items having missing data for more than 10 minutes

Could be high load. Also check Administration->Queue

Zabbix escalator processes more than 75% busy

probably high system load overall

Check agent

zabbix_get -s -k agent.version


Could be anything, enable logging on agent. It could be version mismatch. Check

zabbix_get -s yourhost -k agent.version

If that works, you're calling for an undefined or unsupported key.

Incorrect trigger expression. Host "xx" does not exist or you have no access to this host.

Means there's no related item.

zabbix_get returns nothing

best look at log on agent side

run playbook on single host

ansible_playbook -l somehost somplay.yml



Zabbix server is not running: the information displayed may not be current

Might be selinux:



Monitoring vmware

vmware.hv.cpu.usage[{$URL},{HOST.HOST}]" became not supported: Couldn't resolve host name

Set macro {$URL} to https://your.ip/sdk/ (shouldn't discovery figure that out from {$HOST} ?

Couldn't resolve host name

Sometimes it's a matter of waiting a few hours

unsupported item key

This might mean it's expecting a value from the script you're calling.

echo 1

ansible or API not showing host groups

Permissions!! See Administration->User Groups


failed to update local proxy configuration copy: invalid field name "items.lastlogsize"

check everything :)

Received value [11] is not suitable for value type [Numeric (unsigned)] and data type [Decimal]

This probably means the agent returned 1\n1


database is down: retrying in 10 seconds

try upping max_connections

[Incorrect key file for table 'items'; try to repair it

Could be something /tmp related