Kubernetes: Display Pods by age in ascending order

Question

I use below command to sort the pods by age

kubectl get pods --sort-by={metadata.creationTimestamp}

It shows up pods in descending order. How can we select sorting order like ascending?

Answer 1

Not supported by kubectl or the kube-apiserver as of this writing (AFAIK), but a workaround would be:

$ kubectl get pods --sort-by=.metadata.creationTimestamp | tail -n +2 | tac

or if tac is not available (MacOS X):

$ kubectl get pods --sort-by=.metadata.creationTimestamp | tail -n +2 | tail -r

If you want the header:

$ echo 'NAME                                                              READY   STATUS             RESTARTS   AGE' | \
 kubectl get pods --sort-by=.metadata.creationTimestamp | tail -n +2 | tac

You might just have to adjust the tabs on the header accordingly. Or if you don't want to use tail -n +2 you can use --no-headers. For example:

$ kubectl get pods --sort-by=.metadata.creationTimestamp --no-headers | tac