initial commit

Author: Brian Czapiga

Gemfile

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+source 'https://rubygems.org'
+gem 'redis'
+gem 'oj'
+gem 'json'

README.md

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+# Sensu-Flapjack Pipe Handler
+
+## Usage
+
+```
+{
+  "handlers": {
+    "flapjack": {
+      "type": "pipe",
+#      "command": "/etc/sensu/handlers/flapjack.rb -h 127.0.0.1 -p 6380 -c events -d 0"
+      "command": "/etc/sensu/handlers/flapjack.rb"
+    }
+  }
+}
+```
+
+Note that a check must be either defined as type _metric_ or in a state other than OK in order to be passed to a standard file (pipe) handler.
+
+## Sources
+
+Uses source and fragments from:
+
+- https://github.com/sensu/sensu
+- https://github.com/sensu/sensu-community-plugins/commits/e58c1f3ce39c6c0ca271fadd470c04362e92b190/extensions/handlers/flapjack.rb
+- https://github.com/flapjack/flapjack
+
+## License
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

flapjack.rb

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+#!/usr/bin/env ruby
+
+require 'json'
+require 'optparse'
+require 'redis'
+require 'oj'
+
+options = {
+  host: '127.0.0.1',
+  port: 6380,
+  channel: 'events',
+  db: 0
+}
+
+optparse = OptionParser.new do |opts|
+  opts.banner = <<eos
+Usage: flapjack.rb [-h host] [-p port] [-d database] [-c channel]
+
+Relay handler will immediately read Sensu Event Handler JSON and connect
+to default server unless overridden by command line options.
+
+eos
+
+  opts.on("-h", "--host redisHost", "Redis Host") do |h|
+    options[:host] = h
+  end
+
+  opts.on("-p", "--port redisPort", "Redis Port") do |p|
+    options[:port] = p.to_i
+  end
+
+  opts.on("-d", "--database redisDatabase", "Redis Database") do |d|
+    options[:db] = d.to_i
+  end
+
+  opts.on("-c", "--channel redisChannel", "Redis Channel") do |c|
+    options[:channel] = c
+  end
+end
+
+optparse.parse(ARGV)
+
+if options[:host].nil? || options[:host] == ''
+  puts "FATAL: You must specify a redis host (-h)."
+  puts optparse.help
+  exit
+end
+
+jsonInput = $stdin.read
+event = JSON.parse(jsonInput)
+
+redis = Redis.new(options)
+
+SEVERITIES = ['ok', 'warning', 'critical', 'unknown']
+client = event['client']
+check = event['check']
+tags = []
+
+tags.concat(client['tags']) if client['tags'].is_a?(Array)
+tags.concat(check['tags']) if check['tags'].is_a?(Array)
+tags << client['environment'] unless client['environment'].nil?
+unless check['subscribers'].nil? || check['subscribers'].empty? # rubocop:disable UnlessElse
+  tags.concat(client['subscriptions'] - (client['subscriptions'] - check['subscribers']))
+else
+  tags.concat(client['subscriptions'])
+end
+details = ['Address:' + client['address']]
+details << 'Tags:' + tags.join(',')
+details << "Raw Output: #{check[:output]}" if check[:notification]
+
+flapjack_event = {
+  entity: client['name'],
+  check: check['name'],
+  type: 'service',
+  state: SEVERITIES[check['status']] || 'unknown',
+  summary: check['notification'] || check['output'],
+  details: details.join(' '),
+  time: check['executed'],
+  tags: tags
+}
+
+redis.lpush(options[:channel], Oj.dump(flapjack_event, :mode => :compat, :time_format => :ruby, :indent => 0))