Kubernetes: A Pod’s Life

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As you might have guessed, the title of this blog is a reference to the 1998 Pixar movie A Bug’s Life and indeed, there are many parallels between a worker ant and a pod in Kubernetes. In the following, we’ll have a closer look at the entire pod lifecycle here from a practitioners point-of-view, including ways how you can influence the start-up and shut-down behavior and good practices around application health-checking.

No matter if you create a pod manually or, preferably through a supervisor such as a deployment, a daemon set or a stateful set, the pod can be in one of the following phases:

  • Pending: The API Server has created a pod resource and stored it in etcd, but the pod has not been scheduled yet, nor have container images been pulled from the registry.

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