Kubernetes pod gets recreated when deleted

Question

I have started pods with command

$ kubectl run busybox --image=busybox --restart=Never --tty -i --generator=run-pod/v1

Something went wrong, and now I can't delete this Pod.

I tried using the methods described below but the Pod keeps being recreated.

$ kubectl delete pods  busybox-na3tm
pod "busybox-na3tm" deleted
$ kubectl get pods
NAME                                     READY     STATUS              RESTARTS   AGE
busybox-vlzh3                            0/1       ContainerCreating   0          14s

$ kubectl delete pod busybox-vlzh3 --grace-period=0


$ kubectl delete pods --all
pod "busybox-131cq" deleted
pod "busybox-136x9" deleted
pod "busybox-13f8a" deleted
pod "busybox-13svg" deleted
pod "busybox-1465m" deleted
pod "busybox-14uz1" deleted
pod "busybox-15raj" deleted
pod "busybox-160to" deleted
pod "busybox-16191" deleted


$ kubectl get pods --all-namespaces
NAMESPACE   NAME            READY     STATUS              RESTARTS   AGE
default     busybox-c9rnx   0/1       RunContainerError   0          23s

Answer 1

You need to delete the deployment, which should in turn delete the pods and the replica sets https://github.com/kubernetes/kubernetes/issues/24137

To list all deployments:

kubectl get deployments --all-namespaces

Then to delete the deployment:

kubectl delete -n NAMESPACE deployment DEPLOYMENT

Where NAMESPACE is the namespace it's in, and DEPLOYMENT is the name of the deployment. If NAMESPACE is default, leave off the -n option altogether.

In some cases it could also be running due to a job or daemonset. Check the following and run their appropriate delete command.

kubectl get jobs

kubectl get daemonsets.app --all-namespaces

kubectl get daemonsets.extensions --all-namespaces

Answer 2

Instead of trying to figure out whether it is a deployment, deamonset, statefulset... or what (in my case it was a replication controller that kept spanning new pods :) In order to determine what it was that kept spanning up the image I got all the resources with this command:

kubectl get all

Of course you could also get all resources from all namespaces:

kubectl get all --all-namespaces

or define the namespace you would like to inspect:

kubectl get all -n NAMESPACE_NAME

Once I saw that the replication controller was responsible for my trouble I deleted it:

kubectl delete replicationcontroller/CONTROLLER_NAME

Answer 3

if your pod has name like name-xxx-yyy, it could be controlled by a replicasets.apps named name-xxx, you should delete that replicaset first before deleting the pod

kubectl delete replicasets.apps name-xxx

Answer 4

Look out for stateful sets as well

kubectl get sts --all-namespaces

to delete all the stateful sets in a namespace

kubectl --namespace <yournamespace> delete sts --all

to delete them one by one

kubectl --namespace ag1 delete sts mssql1 
kubectl --namespace ag1 delete sts mssql2
kubectl --namespace ag1 delete sts mssql3

Answer 5

Many answers here tells to delete a specific k8s object, but you can delete multiple objects at once, instead of one by one:

kubectl delete deployments,jobs,services,pods --all -n <namespace>

In my case, I'm running OpenShift cluster with OLM - Operator Lifecycle Manager. OLM is the one who controls the deployment, so when I deleted the deployment, it was not sufficient to stop the pods from restarting.

Only when I deleted OLM and its subscription, the deployment, services and pods were gone.

First list all k8s objects in your namespace:

$ kubectl get all -n openshift-submariner

NAME                                       READY   STATUS    RESTARTS   AGE
pod/submariner-operator-847f545595-jwv27   1/1     Running   0          8d  
NAME                                  TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)    AGE
service/submariner-operator-metrics   ClusterIP   101.34.190.249   <none>        8383/TCP   8d
NAME                                  READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/submariner-operator   1/1     1            1           8d
NAME                                             DESIRED   CURRENT   READY   AGE
replicaset.apps/submariner-operator-847f545595   1         1         1       8d

OLM is not listed with get all, so I search for it specifically:

$ kubectl get olm -n openshift-submariner

NAME                                                      AGE
operatorgroup.operators.coreos.com/openshift-submariner   8d
NAME                                                             DISPLAY      VERSION
clusterserviceversion.operators.coreos.com/submariner-operator   Submariner   0.0.1 

Now delete all objects, including OLMs, subscriptions, deployments, replica-sets, etc:

$ kubectl delete olm,svc,rs,rc,subs,deploy,jobs,pods --all -n openshift-submariner

operatorgroup.operators.coreos.com "openshift-submariner" deleted
clusterserviceversion.operators.coreos.com "submariner-operator" deleted
deployment.extensions "submariner-operator" deleted
subscription.operators.coreos.com "submariner" deleted
service "submariner-operator-metrics" deleted
replicaset.extensions "submariner-operator-847f545595" deleted
pod "submariner-operator-847f545595-jwv27" deleted

List objects again - all gone:

$ kubectl get all -n openshift-submariner
No resources found.

$ kubectl get olm -n openshift-submariner
No resources found.

Answer 6

This will provide information about all the pods,deployments, services and jobs in the namespace.

kubectl get pods,services,deployments,jobs

pods can either be created by deployments or jobs

kubectl delete job [job_name]
kubectl delete deployment [deployment_name]

If you delete the deployment or job then restart of the pods can be stopped.

Answer 7

In some cases the pods will still not go away even when deleting the deployment. In that case to force delete them you can run the below command.

kubectl delete pods podname --grace-period=0 --force

Answer 8

When the pod is recreating automatically even after the deletion of the pod manually, then those pods have been created using the Deployment. When you create a deployment, it automatically creates ReplicaSet and Pods. Depending upon how many replicas of your pod you mentioned in the deployment script, it will create those number of pods initially. When you try to delete any pod manually, it will automatically create those pod again.

Yes, sometimes you need to delete the pods with force. But in this case force command doesn’t work.

Answer 9

Instead of removing NS you can try removing replicaSet

kubectl get rs --all-namespaces

Then delete the replicaSet

kubectl delete rs your_app_name

Answer 10

After taking an interactive tutorial I ended up with a bunch of pods, services, deployments:

me@pooh ~ > kubectl get pods,services
NAME                                       READY   STATUS    RESTARTS   AGE
pod/kubernetes-bootcamp-5c69669756-lzft5   1/1     Running   0          43s
pod/kubernetes-bootcamp-5c69669756-n947m   1/1     Running   0          43s
pod/kubernetes-bootcamp-5c69669756-s2jhl   1/1     Running   0          43s
pod/kubernetes-bootcamp-5c69669756-v8vd4   1/1     Running   0          43s

NAME                 TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)   AGE
service/kubernetes   ClusterIP   10.96.0.1    <none>        443/TCP   37s
me@pooh ~ > kubectl get deployments --all-namespaces
NAMESPACE     NAME                  DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
default       kubernetes-bootcamp   4         4         4            4           1h
docker        compose               1         1         1            1           1d
docker        compose-api           1         1         1            1           1d
kube-system   kube-dns              1         1         1            1           1d

To clean up everything, delete --all worked fine:

me@pooh ~ > kubectl delete pods,services,deployments --all
pod "kubernetes-bootcamp-5c69669756-lzft5" deleted
pod "kubernetes-bootcamp-5c69669756-n947m" deleted
pod "kubernetes-bootcamp-5c69669756-s2jhl" deleted
pod "kubernetes-bootcamp-5c69669756-v8vd4" deleted
service "kubernetes" deleted
deployment.extensions "kubernetes-bootcamp" deleted

That left me with (what I think is) an empty Kubernetes cluster:

me@pooh ~ > kubectl get pods,services,deployments
NAME                 TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)   AGE
service/kubernetes   ClusterIP   10.96.0.1    <none>        443/TCP   8m

Answer 11

Obviously something is respawning the pod. While a lot of the other answers have you looking at everything (replica sets, jobs, deployments, stateful sets, ...) to find what may be respawning the pod, you can instead just look at the pod to see what spawned it. For example do:

$ kubectl describe pod $mypod | grep 'Controlled By:'
Controlled By:  ReplicaSet/foobar

This tells you exactly what created the pod. You can then go and delete that.

Answer 12

If you have a job that continues running, you need to search the job and delete it:

kubectl get job --all-namespaces | grep <name>

and

kubectl delete job <job-name>

Answer 13

You can do kubectl get replicasets check for old deployment based on age or time

Delete old deployment based on time if you want to delete same current running pod of application

kubectl delete replicasets <Name of replicaset>

Answer 14

I also faced the issue, I have used below command to delete deployment.

kubectl delete deployments DEPLOYMENT_NAME

but still pods was recreating, So I crossed check the Replica Set by using below command

kubectl get rs

then edit the replicaset to 1 to 0

kubectl edit rs REPICASET_NAME

Answer 15

The root cause for the question asked was the deployment/job/replicasets spec attribute strategy->type which defines what should happen when the pod will be destroyed (either implicitly or explicitly). In my case, it was Recreate.

As per @nomad's answer, deleting the deployment/job/replicasets is the simple fix to avoid experimenting with deadly combos before messing up the cluster as a novice user.

Try the following commands to understand the behind the scene actions before jumping into debugging :

kubectl get all -A -o name
kubectl get events -A | grep <pod-name>

Answer 16

In my case I deployed via a YAML file like kubectl apply -f deployment.yaml and the solution appears to be to delete via kubectl delete -f deployment.yaml

Answer 17

With deployments that have stateful sets (or services, jobs, etc.) you can use this command:

This command terminates anything that runs in the specified <NAMESPACE>

kubectl -n <NAMESPACE> delete replicasets,deployments,jobs,service,pods,statefulsets --all

And forceful

kubectl -n <NAMESPACE> delete replicasets,deployments,jobs,service,pods,statefulsets --all --cascade=true --grace-period=0 --force

Answer 18

I experienced a similar problem: after deleting the deployment (kubectl delete deploy <name>), the pods kept "Running" and where automatically re-created after deletion (kubectl delete po <name>).

It turned out that the associated replica set was not deleted automatically for some reason, and after deleting that (kubectl delete rs <name>), it was possible to delete the pods.

Answer 19

This has happened to me with some broken 'helm' installs. You might have a bit of a messed up deployment. If none of the previous suggestions work, look for a daemonset and delete that.

eg kubectl get daemonset --namespace

then delete daemonset

kubectl delete daemonset --namespace <NAMESPACE> --all --force

then try to delete the pods.

kubectl delete pod --namespace  <NAMESPACE> --all --force

Check if pods are gone.

kubectl get pods --all-namespaces