Created
February 21, 2019 19:13
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Sensu Kafka Extension
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| { | |
| "kafka": { | |
| "servers": [ | |
| "kafka1:9092", | |
| "kafka2:9092" | |
| ], | |
| "topic": "sensu" | |
| } | |
| } |
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| require 'sensu-plugin/check/cli' | |
| require 'json' | |
| require 'kafka' | |
| module Sensu | |
| module Extension | |
| class KafkaExtension < Handler | |
| def name | |
| 'kafka' | |
| end | |
| def description | |
| 'Send handled events to kafka' | |
| end | |
| def post_init | |
| @kafka_config = @settings['kafka'] | |
| logger.info("Kafka extension initialized with servers #{@kafka_config[:servers]} and topic #{@kafka_config[:topic]}") | |
| @kafka = Kafka.new(@kafka_config[:servers]) | |
| @producer = @kafka.async_producer( | |
| delivery_threshold: 10, | |
| delivery_interval: 10 | |
| ) | |
| end | |
| def filter_occurrences(event) | |
| event = JSON.load(event) | |
| check = event[:check] | |
| check_occurrences = str2int(check[:occurrences]) || 1 | |
| event_occurrences = str2int(event[:occurrences]) || 1 | |
| refresh = str2int(check[:refresh]) || 1800 | |
| if event[:action] == 'resolve' && event[:occurrences_watermark] >= check_occurrences | |
| return true | |
| else | |
| if event_occurrences < check_occurrences | |
| return false | |
| end | |
| if event_occurrences > check_occurrences && ['create', 'flapping'].include?(event[:action]) | |
| interval = str2int(check[:interval]) || 60 | |
| count = refresh.fdiv(interval).to_i | |
| unless count == 0 || (event_occurrences - check_occurrences) % count == 0 | |
| return false | |
| end | |
| end | |
| end | |
| true | |
| end | |
| def str2int(x) | |
| if x.is_a?(Integer) | |
| return x | |
| elsif x.is_a?(String) | |
| begin | |
| result = Integer(x) | |
| rescue | |
| result = nil | |
| end | |
| end | |
| end | |
| def run(event) | |
| @producer.produce(event.to_json, topic: @kafka_config[:topic]) if filter_occurrences(event) | |
| yield('', 0) | |
| end | |
| def logger | |
| Sensu::Logger.get | |
| end | |
| end | |
| end | |
| end |
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