April 2018
Intermediate to advanced
468 pages
14h 34m
English
Content preview from Mastering Kubernetes - Second Edition
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Redundancy
Redundancy is the foundation of reliable and highly available systems at the hardware and data levels. If a critical component fails and you want the system to keep running, you must have another identical component ready to go. Kubernetes itself takes care of your stateless pods through replication controllers and replica sets. However, your cluster state in etcd and the master components themselves need redundancy to function when some components fail. In addition, if your system's tasteful components are not backed up by redundant storage (for example, on a cloud platform), then you need to add redundancy to prevent data loss.
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