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Is it possible to somehow send alerts (to email / slack) based on events that occur within a Kubernetes cluster?
In particular, it would be useful to get an alert if a pod has restarted unexpectedly or if a pod cannot start. Similarly it would be useful to know if a pod's CPU usage was over a certain threshold and get an alert.
We have Heapster (with InfluxDB / Grafana backend) installed. While this gives useful data, it unfortunately does not provide us with alerting.
Both sysdig and Datadog provide this functionality as well.
You can check and probably replace InfluxDB with http://prometheus.io (I am not sure about your cases but generally it is possible) which has built-in metrics support.