summaryrefslogtreecommitdiff
path: root/lib/custodian/alerts/redis-state.rb
blob: ae62dc3cdcaf9e16a7e4a9de82c05c29b08d27b2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
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
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
#
#  The redis-alerter.
#
#  This doesn't raise/clear alerts in the traditional sense, instead it just
# stores results in a redis database where you can poll them from a status-panel,
# or similar.
#
#  There is a global set called "hosts" which has the hostname-test-type lists
# and the individual results can be pulled by simple key-fetches on those.
#
module Custodian

  module Alerter

    class RedisAlert < AlertFactory


      #
      # The test this alerter cares about
      #
      attr_reader :test


      #
      # The redis-object
      #
      attr_reader :redis




      #
      # Constructor - save the test-object away & instantiate
      # the redis connection.
      #
      def initialize( obj )

        begin
          require 'rubygems'
          require 'redis'

          @redis = Redis.new(:host => @target )

        rescue
          puts "ERROR Loading redis rubygem!"
        end

        @test  = obj
      end



      #
      # Store an alert in redis
      #
      def raise

        return unless( @redis )


        # hostname + test-type
        host = @test.target
        test = @test.get_type

        # store the error
        @redis.set( "#{host}-#{test}", "ERR")
        @redis.set( "#{host}-#{test}-reason", @test.error() )

        # make sure this alert is discoverable
        @redis.sadd( "hosts", "#{host}-#{test}" )
      end



      #
      # Clear an alert in redis
      #
      def clear

        return unless( @redis )


        # hostname + test-type
        host = @test.target
        test = @test.get_type

        # store the OK
        @redis.set( "#{host}-#{test}", "OK")
        @redis.set( "#{host}-#{test}-reason", "")

        # make sure this alert is discoverable
        @redis.sadd( "hosts", "#{host}-#{test}" )
      end



      register_alert_type "redis"




    end
  end
end