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snmptrap-email-handler.in
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snmptrap-email-handler.in
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#!/bin/env ruby
# When an alarm is received, dispatch ones meant for email here
# STDIN is alarm body
require 'optparse'
require 'erb'
require 'yaml'
require 'net/smtp'
require 'logger'
require "socket"
$log = Logger.new('@SIPX_LOGDIR@/snmptrap-email-handler.log') unless defined?($log)
def dispatch(yaml, template, send, input_stream)
data = YAML::load_file(yaml)
alarm = parse_alarm(data, input_stream)
at_least_one_recipient = false
server = data['smtp']
data['emails'].each_key {|template_id|
recipients = get_recipients(data, template_id, alarm)
unless recipients.nil? || recipients.empty?
at_least_one_recipient = true
this_template = sprintf(template, template_id)
msg = get_email(data, alarm, this_template, recipients)
if send
$log.info "Sending email to #{recipients} thru server #{server}"
$log.debug data.inspect
Net::SMTP.start(server) do |smtp|
smtp.send_message(msg, data[:from], recipients)
end
else
print msg
end
end
}
if !at_least_one_recipient
$log.info "No recipients found for alarm with id #{alarm['id']}"
end
end
# look up email or sms addresses using the alarm group id if available
def get_recipients(data, template, alarm)
group = alarm['group']
return nil if group.nil?
return data['emails'][template][group]
end
def get_email(data, alarm, template, recipients)
erb = ERB.new(File.read(template))
erb.filename = template
var = binding
# this is magic that allows in yaml file
# who : world
# when run thru
# hello <%= who %>
# be
# hello world
data.each_key { |x|
eval "#{x} = data['#{x}']", var
}
alarm.each_key { |x|
eval "#{x} = alarm['#{x}']", var
}
return erb.result(var)
end
# Example:
#
# localhost
# UDP: [127.0.0.1]:41347->[127.0.0.1]:162
# DISMAN-EVENT-MIB::sysUpTimeInstance 2:5:14:40.53
#
# Then, following content can vary as follows:
#
# ============ sipxecs alarm =================
# SNMPv2-MIB::snmpTrapOID.0 SIPXECS-ALARM-NOTIFICATION-MIB::alarmNotifications
# SIPXECS-ALARM-NOTIFICATION-MIB::sipxecsAlarmId LOGIN_FAILED
# SIPXECS-ALARM-NOTIFICATION-MIB::sipxecsAlarmSource swift.hubler.us
# SIPXECS-ALARM-NOTIFICATION-MIB::sipxecsAlarmTime "00 00 00 00 "
# SIPXECS-ALARM-NOTIFICATION-MIB::sipxecsAlarmSeverity "00 00 00 00 "
# SIPXECS-ALARM-NOTIFICATION-MIB::sipxecsAlarmDescr = STRING: "logwatcher is not running and is being restarted."
#
# ============= Builtin net-snmp alarm =======
# DISMAN-EVENT-MIB::mteTriggerFired
# DISMAN-EVENT-MIB::mteHotTrigger.0 CPU_THRESHOLD_EXCEEDED
# DISMAN-EVENT-MIB::mteHotTargetName.0 = STRING:
# DISMAN-EVENT-MIB::mteHotContextName.0 = STRING:
# DISMAN-EVENT-MIB::mteHotOID.0 = OID: HOST-RESOURCES-MIB::hrProcessorLoad.768
# DISMAN-EVENT-MIB::mteHotValue.0 95
####################################
def parse_alarm(data, input_stream)
alarm = {}
input_stream.each {|line|
case line
when /^SIPXECS-ALARM-NOTIFICATION-MIB::sipxecsAlarmId (.*)$/
alarm = get_alarm(data, $1)
when /^SIPXECS-ALARM-NOTIFICATION-MIB::sipxecsAlarmSource/
alarm['source'] = line.split[1]
when /^DISMAN-EVENT-MIB::mteHotTrigger.0 (.*)$/
alarm = get_alarm(data, $1)
when /^DISMAN-EVENT-MIB::mteHotValue.0 (.*)$/
alarm['message'] = "threshold is #{$1}"
when /^SIPXECS-ALARM-NOTIFICATION-MIB::sipxecsAlarmDescr "(.*)"$/
alarm['message'] = $1
end
}
return alarm
end
def get_alarm(data, id)
meta = data['alarms'][id]
unless meta.nil?
$log.info 'found alarm definition'
alarm = meta.dup
else
$log.info 'no alarm definition found, using limited data'
alarm = {}
end
alarm['id'] = id
alarm['source'] = Socket.gethostname
return alarm
end
if __FILE__ == $0
$log.info "Called with parameters #{ARGV.join(' ')}"
args = OptionParser.new { |opts|
opts.banner = "Usage : sipx-config-maker [options]"
opts.separator ""
opts.separator "Options:"
opts.on("--help", "Print this help message.") {
puts opts
exit
}
$template = '@SIPX_CONFDIR@/snmp/%s'
opts.on("--template FILE", "ERB formated template for emailing.") {|f|
$template = f
}
opts.on("--in FILE", "YAML formated file for email addresses for alarm traps.") {|f|
$yaml = f
}
$out = nil
opts.on("--out FILE", "Write to file, otherwise email is sent") {|f|
$out = File.open(f, 'w')
}
$log.level = Logger::INFO
opts.on("--debug level", "Set log level, default INFO. Allowed : FATAL, ERROR, WARN, INFO, DEBUG") {|f|
eval "$log.level = Logger::#{f}"
}
$send = false
opts.on("--send", "Actually send the mesage, otherwise print to stdout") {
$send = true
}
}
args.parse!
raise "Missing --in missing parameter to an yaml file" if $yaml.nil?
dispatch($yaml, $template, $send, STDIN)
end