zabbix api user macro registration

user_macro_reg.rb

#! /usr/bin/env ruby

#./user_macro_reg.rb host01 '{$INSTANCEID}' "i-a1b2c3d4"

require "zabbixapi"

unless ARGV.size == 3
  puts "Usage: #{$0} [AGENT_HOST_NAME] [USERMACRO_NAME] [USERMACRO_VALUE]"
  exit 1
end

#ZABBIX CONFIGURATION
zabbix_url = "http(s)://YOUR_ZABBIX_SERVER_URL/api_jsonrpc.php"
zabbix_id = "YOUR_ZABBIX_USER_ID"
zabbix_pass = "YOUR_ZABBIX_USER_PASSWORD"

#ARGUMENTS
host_name = ARGV[0]
macro_name = ARGV[1]
macro_value = ARGV[2]

#ZABBIX AUTHENTICATION
zbx = ZabbixApi.connect(
  :url => zabbix_url , 
  :user => zabbix_id , 
  :password => zabbix_pass
)

#USERMACRO REGISTRATION
zbx.usermacros.create(
    :hostid => zbx.hosts.get_id( :host => host_name ),
    :macro => macro_name,
    :value => macro_value
)