How to delete evicted pods that are older than a month - kubernetes

Question

I'm trying to delete Kubernetes evicted pods which are older than 30 days from all namespaces, but the command throws an error :
Error from server(NotFound): pods (xxxxxxxxxxxxx) not found
Command:
kubectl delete pod $(kubectl get pods --all-namespaces | grep Evicted | sed 's#d$##' | awk '$6 > 30 {print $2}')"
Any ideas?

Answer 1

i think it's due to when you are listing down the pod you are listing all pod and deleting all those
but command
kubectl delete pod not getting the namespace from which to delete the specific pod
kubectl delete pod $(kubectl get pods --all-namespaces | grep Evicted | awk '$6 > 30 {print $2}') -n $(kubectl get pods --all-namespaces | grep Evicted | awk '$6 > 30 {print $1}')
maybe you try something like or simplify it better way.

Answer 2

This assumes the GNU coreutils version of date and a bourne-like shell:
One-liner:
onemonthago=$(date -u -d '-1 month' +"%FT%TZ"); kubectl get pod --field-selector='status.phase=Failed' -o custom-columns=NAMESPACE:.metadata.namespace,NAME:.metadata.name,STATUS:.status.reason,STARTTIME:.status.startTime -A | while read ns pod status starttime; do if [ "$status" = "Evicted" ]; then if [ "$starttime" \> "$onemonthago" ]; then kubectl -n $ns delete pod $pod --wait=false; fi; fi; done
More readable formatting:
onemonthago=$(date -u -d '-1 month' +"%FT%TZ");
kubectl get pod --field-selector='status.phase=Failed' -o custom-columns=NAMESPACE:.metadata.namespace,NAME:.metadata.name,STATUS:.status.reason,STARTTIME:.status.startTime -A | while read ns pod status starttime; do
if [ "$status" = "Evicted" ]; then
if [ "$starttime" \> "$onemonthago" ]; then
kubectl -n $ns delete pod $pod --wait=false;
fi;
fi;
done
The details:
onemonthago=$(date -u -d '-1 month' +"%FT%TZ"); gets the cutoff time in the same format as what kubectl returns and stores it in a shell variable.
The kubectl then gets all the failed pods and outputs the columns that we need for further steps.
It then gets piped to a while loop that reads the fields into shell variables.
The if statements then check whether the pod was evicted or is failed for another reason (The status.reason field is not supported for --field-selector) and that it is older than a month. If it matches that criteria, it deletes it.
(It is likely possible to optimise it to gather a list of all pods in a namespace and pass that to the minimum number of kubectls using xargs in one go) (Both checks can be combined, either in the shell or in AWK as well) (Replacing the entire while with an elaborate AWK script would likely yield the best perfomance (collecting a list of pos to delete per namespace and running / outputting the delete command from the END pattern)