How do I delete all these kubernetes k8s_* containers - docker

Question

New to kubernetes. I was following a tutorial on kubernetes the other day. I forgot what I was doing. Running docker ps shows many containers of k8s*.
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
3ce38bbf370b f3591b2cb223 "/api-server --kubec…" 3 hours ago Up 3 hours k8s_compose_compose-api-57ff65b8c7-cc6qf_docker_460bc96e-dcfe-11e9-9213-025000000001_6
222239366ae5 eb516548c180 "/coredns -conf /etc…" 3 hours ago Up 3 hours k8s_coredns_coredns-fb8b8dccf-7vp79_kube-system_35ecd610-dcfe-11e9-9213-025000000001_6
0e4a5a5c23bd eb516548c180 "/coredns -conf /etc…" 3 hours ago Up 3 hours k8s_coredns_coredns-fb8b8dccf-h7tvr_kube-system_35edfd50-dcfe-11e9-9213-025000000001_6
332d3d26c082 9946f563237c "kube-apiserver --ad…" 3 hours ago Up 3 hours k8s_kube-apiserver_kube-apiserver-docker-desktop_kube-system_7c4f3d43558e9fadf2d2b323b2e78235_4
5778a63798ab k8s.gcr.io/pause:3.1 "/pause" 3 hours ago Up 3 hours k8s_POD_kube-apiserver-docker-desktop_kube-system_7c4f3d43558e9fadf2d2b323b2e78235_3
a0a26d6a2d08 2c4adeb21b4f "etcd --advertise-cl…" 3 hours ago Up 3 hours k8s_etcd_etcd-docker-desktop_kube-system_3773efb8e009876ddfa2c10173dba95e_3
e6038e717c64 ac2ce44462bc "kube-controller-man…" 3 hours ago Up 3 hours k8s_kube-controller-manager_kube-controller-manager-docker-desktop_kube-system_9c58c6d32bd3a2d42b8b10905b8e8f54_4
10e962e90703 004666307c5b "/usr/local/bin/kube…" 3 hours ago Up 3 hours k8s_kube-proxy_kube-proxy-pq4f7_kube-system_35ac91f0-dcfe-11e9-9213-025000000001_4
21b4a7aa37d0 953364a3ae7a "kube-scheduler --bi…" 3 hours ago Up 3 hours k8s_kube-scheduler_kube-scheduler-docker-desktop_kube-system_124f5bab49bf26c80b1c1be19641c3e8_4
d9447c41bc55 k8s.gcr.io/pause:3.1 "/pause" 3 hours ago Up 3 hours k8s_POD_kube-proxy-pq4f7_kube-system_35ac91f0-dcfe-11e9-9213-025000000001_4
65248416150d k8s.gcr.io/pause:3.1 "/pause" 3 hours ago Up 3 hours k8s_POD_kube-controller-manager-docker-desktop_kube-system_9c58c6d32bd3a2d42b8b10905b8e8f54_3
4afff5745b79 k8s.gcr.io/pause:3.1 "/pause" 3 hours ago Up 3 hours k8s_POD_kube-scheduler-docker-desktop_kube-system_124f5bab49bf26c80b1c1be19641c3e8_3
d6db038ea9b3 k8s.gcr.io/pause:3.1 "/pause" 3 hours ago Up 3 hours k8s_POD_etcd-docker-desktop_kube-system_3773efb8e009876ddfa2c10173dba95e_3
9ca30180ab45 k8s.gcr.io/pause:3.1 "/pause" 3 hours ago Up 3 hours k8s_POD_compose-api-57ff65b8c7-cc6qf_docker_460bc96e-dcfe-11e9-9213-025000000001_4
338d226f12d9 a8c3d87a58e7 "/compose-controller…" 3 hours ago Up 3 hours k8s_compose_compose-6c67d745f6-9v5k5_docker_461b37ab-dcfe-11e9-9213-025000000001_3
6e23ff5c4b86 k8s.gcr.io/pause:3.1 "/pause" 3 hours ago Up 3 hours k8s_POD_coredns-fb8b8dccf-7vp79_kube-system_35ecd610-dcfe-11e9-9213-025000000001_5
258ced5c1498 k8s.gcr.io/pause:3.1 "/pause" 3 hours ago Up 3 hours k8s_POD_coredns-fb8b8dccf-h7tvr_kube-system_35edfd50-dcfe-11e9-9213-025000000001_4
0ee3d792d79e k8s.gcr.io/pause:3.1 "/pause" 3 hours ago Up 3 hours k8s_POD_compose-6c67d745f6-9v5k5_docker_461b37ab-dcfe-11e9-9213-025000000001_4
I also ran kubectl with --namespace provided. When I only execute kubectl get pods, it says no resource found.
$ kubectl get pods --namespace kube-system
NAME READY STATUS RESTARTS AGE
coredns-5644d7b6d9-frlhd 1/1 Running 1 9m30s
coredns-5644d7b6d9-xmdtg 1/1 Running 1 9m30s
etcd-minikube 1/1 Running 1 8m29s
kube-addon-manager-minikube 1/1 Running 1 8m23s
kube-apiserver-minikube 1/1 Running 1 8m42s
kube-controller-manager-minikube 1/1 Running 1 8m22s
kube-proxy-48kxn 1/1 Running 1 9m30s
kube-scheduler-minikube 1/1 Running 1 8m32s
storage-provisioner 1/1 Running 1 9m27s
I also tried stopping the containers using docker stop. It stopped but few seconds later, the containers started again.
I also ran minikube delete but it only deleted minikube. The command docker ps still showed the containers.
I'd like to start from beginning again.

Answer 1

Don't try to delete pause containers.
k8s.gcr.io/pause:3.1 "/pause"
You can bring multiple containers in a k8s pod and they share same network namespace.
The pause containers are meant to be a way to share network namespace.
That's how the k8s pod is created.
For more info, please go through this.

Answer 2

If you want to reset your cluster, you can first list all namespaces using kubectl get namespaces, then delete them using kubectl delete namespaces namespace_name.
However, you can't delete the namespaces default, kube-system, and kube-public as those are protected by the cluster. What you can do is remove all Pods from the default and kube-public namespace using kubectl delete --all pods --namespace=default; kubectl delete --all pods --namespace=kube-public. You shouldn't touch the kube-system namespace as it contains resources that are mandatory for the cluster to function.

Answer 3

You can try deleting the files using the below commands:
kubectl delete -f <file location>
The file which you installed using:
kubectl apply -f <file location>
you can remove all the tags associated with it using:
istioctl tag remove <profile>
Note: You can refer manifests/profiles for referring the profiles

Answer 4

My situation is similar with you. Forgot what I did, then finding out many *k8s* containers running in docker. Which once deleted, will be started again automatically.
Uncheck Docker Desktop -> Settings -> Kubernetes -> Enable Kubernetes works for me. Hope that helps.