April 2018
Intermediate to advanced
468 pages
14h 34m
English
Content preview from Mastering Kubernetes - Second Edition
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Node problem detector
The node problem detector is a pod that runs on every node. It needs to solve a difficult problem. It needs to detect various problems across different environments, different hardware, and different OSes. It needs to be reliable enough not to be affected itself (otherwise, it can't report the problem), and it needs to have relatively-low overhead to avoid spamming the master. In addition, it needs to run on every node. Kubernetes recently received a new capability named DaemonSet that addresses that last concern.
The source code is at https://github.com/kubernetes/node-problem-detector.
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