kubernetes-oomkill-exporter is parsing kernel log for killed pods, collects information like namespace from docker containerd and exposes them in a Prometheus metric. It can be deployed as a DaemonSet to run on every node in your cluster, see here for an example. Exported metric is called klog_pod_oomkill and counts the amount of oomkills of a certain pod.
A Prometheus query for alerting could look something like this:
sum by(namespace, pod_name) (changes(klog_pod_oomkill[30m])) > 2
Note: Recent versions of kubernetes-oomkill-exporter (>=0.5.0) are only working with nodes running containerd as container runtime. If you are using docker please use a version prior than that.
This project is licensed under the Apache2 License - see the LICENSE file for details