Flapjack 介绍
Flapjack 是一个灵活的监控通知路由系统，可处理：
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路由警告 (determining who should receive alerts based on interest, time of day, scheduled maintenance, etc)
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警告统计 (with per-user, per media summary thresholds)
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标准运维任务 (setting scheduled maintenance, acknowledgements, etc)
Flapjack 用于如下场景：
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You want to identify failures faster by rolling up your alerts across multiple monitoring systems.
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You monitor infrastructures that have multiple teams responsible for keeping them up.
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Your monitoring infrastructure is multitenant , and each customer has a bespoke alerting strategy.
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You want to dip your toe in the water and try alternative check execution engines like Sensu, Icinga, or cron in parallel to Nagios.