Kubernetes is an open-source container orchestration system that automates the deployment, scaling, and management of containerized applications. As part of its management features, Kubernetes automatically evicts pods that are no longer needed or have encountered errors. These evicted pods can accumulate over time and consume valuable resources. In this article, we will discuss how to delete all evicted pods in Kubernetes.
Commands Used in this Article
Before we proceed with the steps, let's first take a look at the commands that we will be using in this article:- kubectl get pods - List all pods
- kubectl get pods --all-namespaces - List all pods in all namespaces
- kubectl get pods --field-selector=status.phase=Failed - List all failed pods
- kubectl delete pod <pod-name> - Delete a specific pod
- kubectl delete pods --all - Delete all pods
Step-by-Step Instructions
To delete all evicted pods in Kubernetes, follow these steps:
Step 1: Check for Evicted Pods
The first step is to check for evicted pods. You can do this by running the following command:
kubectl get pods --all-namespaces | grep Evicted
This command will list all evicted pods in all namespaces. You can also filter the results by namespace by adding the namespace name at the end of the command, like this:
kubectl get pods --namespace=<namespace-name> | grep Evicted
Step 2: Delete Evicted Pods
Once you have identified the evicted pods, you can delete them using the following command:
kubectl delete pods --all-namespaces --field-selector=status.phase=Failed
This command will delete all pods that have failed status. This includes all evicted pods.
If you want to delete evicted pods in a specific namespace, you can add the namespace name to the command, like this:
kubectl delete pods --namespace=<namespace-name> --field-selector=status.phase=Failed
Alternatively, you can delete a specific evicted pod by running the following command:
kubectl delete pod <pod-name>
This command will delete the specified evicted pod.
More Examples
Here are some more examples of how you can delete evicted pods in Kubernetes:
Example 1: Delete all evicted pods in the default namespace
kubectl delete pods --namespace=default --field-selector=status.phase=Failed
Example 2: Delete a specific evicted pod in the kube-system namespace
kubectl delete pod my-pod --namespace=kube-system
In this article, we have discussed how to delete all evicted pods in Kubernetes. By following these steps, you can free up valuable resources in your cluster and keep it running smoothly. Remember to check for evicted pods regularly and delete them as needed to keep your cluster healthy.
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That's it for this post. Keep practicing and have fun. Leave your comments if any.