Class: LogStash::Outputs::Nagios

Inherits:
Base
  • Object
show all
Defined in:
lib/logstash/outputs/nagios.rb

Constant Summary collapse

NAGIOS_CRITICAL = 
2
NAGIOS_WARN = 
1

Instance Attribute Summary

Attributes inherited from Base

#logger

Instance Method Summary collapse

Constructor Details

#initialize(url, config = {}, &block) ⇒ Nagios

Returns a new instance of Nagios.



9
10
11
12
13
14
15
16
17
 
# File 'lib/logstash/outputs/nagios.rb', line 9

def initialize(url, config={}, &block)
  super

  if @url.path == "" or @url.path == "/"
    @cmdfile = "/var/lib/nagios3/rw/nagios.cmd"
  else
    @cmdfile = @url.path
  end
end

Instance Method Details

#receive(event) ⇒ Object 



25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
 
# File 'lib/logstash/outputs/nagios.rb', line 25

def receive(event)
  if !File.exists?(@cmdfile)
    @logger.warn(["Skipping nagios output; command file is missing",
                 {"cmdfile" => @cmdfile, "missed_event" => event}])
    return
  end

  # TODO(petef): if nagios_host/nagios_service both have more than one
  # value, send multiple alerts. They will have to match up together by
  # array indexes (host/service combos) and the arrays must be the same
  # length.

  host = event.fields["nagios_host"]
  if !host
    @logger.warn(["Skipping nagios output; nagios_host field is missing",
                 {"missed_event" => event}])
    return
  end

  service = event.fields["nagios_service"]
  if !service
    @logger.warn(["Skipping nagios output; nagios_service field is missing",
                 {"missed_event" => event}])
    return
  end

  annotation = event.fields["nagios_annotation"]
  level = NAGIOS_CRITICAL
  if event.fields["nagios_level"] and event.fields["nagios_level"][0].downcase == "warn"
    level = NAGIOS_WARN
  end

  cmd = "[#{Time.now.to_i}] PROCESS_SERVICE_CHECK_RESULT;#{host[0]};#{service[0]};#{level};"
  if annotation
    cmd += "#{annotation[0]}: "
  end
  cmd += "#{event.source}: "
  # In the multi-line case, escape the newlines for the nagios command file
  cmd += event.message.gsub("\n", "\\n")

  @logger.debug({"cmdfile" => @cmdfile, "nagios_command" => cmd})
  begin
    File.open(@cmdfile, "a") do |f|
      f.puts cmd
    end
  rescue
    @logger.warn(["Skipping nagios output; error writing to command file",
                 {"error" => $!, "cmdfile" => @cmdfile,
                  "missed_event" => event}])
  end
end

#register ⇒ Object 



20
21
22
 
# File 'lib/logstash/outputs/nagios.rb', line 20

def register
  # nothing to do
end