June 2023
Intermediate to advanced
746 pages
18h 20m
English
Content preview from Mastering Kubernetes - Fourth Edition
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7
Running Stateful Applications with Kubernetes
In this chapter, we will learn how to run stateful applications on Kubernetes. Kubernetes takes a lot of work out of our hands by automatically starting and restarting pods across the cluster nodes as needed, based on complex requirements and configurations such as namespaces, limits, and quotas. But when pods run storage-aware software, such as databases and queues, relocating a pod can cause a system to break.
First, we’ll explore the essence of stateful pods and why they are much more complicated to manage in Kubernetes. We will look at a few ways to manage the complexity, such as shared environment variables and DNS records. In some situations, a redundant in-memory state, a DaemonSet, or persistent ...
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