This plugin evicts the given pod. useful for testing pod disruption budget rules
# before running the evict-pod command
$ kubectl get pods -n kube-system
NAME READY STATUS RESTARTS AGE
coredns-fb8b8dccf-6wvj6 1/1 Running 0 10m
coredns-fb8b8dccf-826fh 1/1 Running 0 9m55s
etcd-minikube 1/1 Running 3 27d
kube-addon-manager-minikube 1/1 Running 13 27d
kube-apiserver-minikube 1/1 Running 3 27d
kube-controller-manager-minikube 1/1 Running 0 9h
kube-proxy-cwwm8 1/1 Running 3 27d
kube-scheduler-minikube 1/1 Running 5 27d
storage-provisioner 1/1 Running 6 27d
# now lets evict the coredns pod
$ ./kubectl-evict-pod coredns-fb8b8dccf-6wvj6 -n kube-system
INFO[0000] pod "coredns-fb8b8dccf-6wvj6" in namespace kube-system evicted successfully
# observe that the pod has been evicted successfully
$ kubectl get pods -n kube-system
NAME READY STATUS RESTARTS AGE
coredns-fb8b8dccf-7ngmk 1/1 Running 0 42s
coredns-fb8b8dccf-826fh 1/1 Running 0 11m
etcd-minikube 1/1 Running 3 27d
kube-addon-manager-minikube 1/1 Running 13 27d
kube-apiserver-minikube 1/1 Running 3 27d
kube-controller-manager-minikube 1/1 Running 0 9h
kube-proxy-cwwm8 1/1 Running 3 27d
kube-scheduler-minikube 1/1 Running 5 27d
storage-provisioner 1/1 Running 6 27d- create the pod disruption budget using following spec
apiVersion: policy/v1beta1
kind: PodDisruptionBudget
metadata:
name: coredns-pdb
spec:
minAvailable: 2
selector:
matchLabels:
k8s-app: kube-dns- apply the pod disruption budget to the cluster
# lets apply the pod disruption budget
$ kubectl apply -f pdb.yaml -n kube-system
poddisruptionbudget.policy/coredns-pdb created- Now lets try to evict the pods again
# get existing pods
$ kubectl get pods -n kube-system
NAME READY STATUS RESTARTS AGE
coredns-fb8b8dccf-7ngmk 1/1 Running 0 4m6s
coredns-fb8b8dccf-826fh 1/1 Running 0 14m
etcd-minikube 1/1 Running 3 27d
kube-addon-manager-minikube 1/1 Running 13 27d
kube-apiserver-minikube 1/1 Running 3 27d
kube-controller-manager-minikube 1/1 Running 0 9h
kube-proxy-cwwm8 1/1 Running 3 27d
kube-scheduler-minikube 1/1 Running 5 27d
storage-provisioner 1/1 Running 6 27d
# now lets try to evict the pod again
$ ./kubectl-evict-pod coredns-fb8b8dccf-826fh -n kube-system
Error: Cannot evict pod as it would violate the pod\'s disruption budget.
exit status 1
# observe pods continue to run
$ kubectl get pods -n kube-system
NAME READY STATUS RESTARTS AGE
coredns-fb8b8dccf-7ngmk 1/1 Running 0 10m
coredns-fb8b8dccf-826fh 1/1 Running 0 21m
etcd-minikube 1/1 Running 3 27d
kube-addon-manager-minikube 1/1 Running 13 27d
kube-apiserver-minikube 1/1 Running 3 27d
kube-controller-manager-minikube 1/1 Running 0 9h
kube-proxy-cwwm8 1/1 Running 3 27d
kube-scheduler-minikube 1/1 Running 5 27d
storage-provisioner 1/1 Running 6 27d