Zabbix Web scenarios variables random number or other function - zabbix

Question

I need post variable with random number value. How can i generate random variable in web scenario? Can i run some script or macro to generate random value for scenario or step?

Answer 1

There is no native way to do it, as you guessed you can make it work with a macro and a custom script.
You can define a {$RANDOM} host macro and use it in the web scenario step as a post field value.
Then you have to change it periodically with a crontabbed script, a python sample like:
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Set a random macro to a value.
Provide user from the commandline or from Env var support:
# export ZABBIX_SERVER='https://your_zabbix_host/zabbix/'
# export ZABBIX_USERNAME='admin'
# export ZABBIX_PASSWORD='secretPassword'
$ ./setRandomMacro.py -u admin -p zabbix -Z http://yourzabbix -H yourHost -M '{$RANDOM}'
Connecting to http://yourzabbix
Host yourHost (Id: ----)
{$RANDOM}: current value "17" -> new value "356"
$ ./setRandomMacro.py -u admin -p zabbix -Z http://yourzabbix -H yourHost -M '{$RANDOM}'
Connecting to http://yourzabbix
Host yourHost (Id: ----)
{$RANDOM}: current value "356" -> new value "72"
"""
from zabbix.api import ZabbixAPI
import json
import argparse
import getopt
import sys
import os
import random
# Class for argparse env variable support
class EnvDefault(argparse.Action):
# From https://stackoverflow.com/questions/10551117/
def __init__(self, envvar, required=True, default=None, **kwargs):
if not default and envvar:
if envvar in os.environ:
default = os.environ[envvar]
if required and default:
required = False
super(EnvDefault, self).__init__(default=default, required=required,
**kwargs)
def __call__(self, parser, namespace, values, option_string=None):
setattr(namespace, self.dest, values)
def jsonPrint(jsonUgly):
print(json.dumps(jsonUgly, indent=4, separators=(',', ': ')))
def ArgumentParser():
parser = argparse.ArgumentParser()
parser.add_argument('-Z',
required=True,
action=EnvDefault,
envvar='ZABBIX_SERVER',
help="Specify the zabbix server URL ie: http://yourserver/zabbix/ (ZABBIX_SERVER environment variable)",
metavar='zabbix-server-url')
parser.add_argument('-u',
required=True,
action=EnvDefault,
envvar='ZABBIX_USERNAME',
help="Specify the zabbix username (ZABBIX_USERNAME environment variable)",
metavar='Username')
parser.add_argument('-p',
required=True,
action=EnvDefault,
envvar='ZABBIX_PASSWORD',
help="Specify the zabbix username (ZABBIX_PASSWORD environment variable)",
metavar='Password')
parser.add_argument('-H',
required=True,
help="Hostname",
metavar='hostname')
parser.add_argument('-M',
required=True,
help="Macro to set",
metavar='macro')
return parser.parse_args()
def main(argv):
# Parse arguments and build work variables
args = ArgumentParser()
zabbixURL = args.Z
zabbixUsername = args.u
zabbixPassword = args.p
hostName = args.H
macroName = args.M
# API Connect
print('Connecting to {}'.format(zabbixURL))
zapi = ZabbixAPI(url=zabbixURL, user=zabbixUsername,
password=zabbixPassword)
hostObj = zapi.host.get(search={'host': hostName}, output='hostids')
print('Host {} (Id: {})'.format(hostName, hostObj[0]['hostid']))
currentMacro = zapi.usermacro.get(
hostids=hostObj[0]['hostid'], filter={'macro': macroName})
if (currentMacro):
newMacroValue = random.randint(1, 1001)
print('{}: current value "{}" -> new value "{}"'.format(macroName,
currentMacro[0]['value'], newMacroValue))
zapi.usermacro.update(
hostmacroid=currentMacro[0]['hostmacroid'], value=newMacroValue)
else:
print('No {} macro found on host {}'.format(macroName, hostName))
if __name__ == "__main__":
main(sys.argv[1:])