Where to execute kube-proxy command? - kubernetes

Question

From this article, I can specify 'userspace' as my proxy-mode, but I am unable to understand what command I need to use for it and at what stage? Like after creating deployment or service?
I am running a minikube cluster currently.

Answer 1

kube-proxy is a process that runs on each kubernetes node to manage network connections coming into and out of kubernetes.
You don't run the command as such, but your deployment method (usually kubeadm) configures the options for it to run.
As #Hang Du mentioned, in minikube you can modify it's options by editing the kube-proxy configmap and changing mode to userspace
kubectl -n kube-system edit configmap kube-proxy
Then delete the Pod.
kubectl -n kube-system get pod
kubectl -n kube-system delete pod kube-proxy-XXXXX

Answer 2

If you are using minikube, you can find a DaemonSet named kube-proxy like followings:
$ kubectl get ds -n kube-system kube-proxy -o yaml
apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
...
labels:
k8s-app: kube-proxy
name: kube-proxy
namespace: kube-system
...
spec:
...
spec:
containers:
- command:
- /usr/local/bin/kube-proxy
- --config=/var/lib/kube-proxy/config.conf
- --hostname-override=$(NODE_NAME)
env:
- name: NODE_NAME
valueFrom:
fieldRef:
apiVersion: v1
fieldPath: spec.nodeName
image: k8s.gcr.io/kube-proxy:v1.15.0
imagePullPolicy: IfNotPresent
name: kube-proxy
...
volumeMounts:
- mountPath: /var/lib/kube-proxy
name: kube-proxy
- mountPath: /run/xtables.lock
name: xtables-lock
- mountPath: /lib/modules
name: lib-modules
readOnly: true
dnsPolicy: ClusterFirst
...
volumes:
- configMap:
defaultMode: 420
name: kube-proxy
name: kube-proxy
- hostPath:
path: /run/xtables.lock
type: FileOrCreate
name: xtables-lock
- hostPath:
path: /lib/modules
type: ""
name: lib-modules
...
Look at the .spec.template.spec.containers[].command, the container runs the kube-proxy command. You can provide the flag --proxy-mode=userspace in the command array.
- command:
- /usr/local/bin/kube-proxy
- --config=/var/lib/kube-proxy/config.conf
- --hostname-override=$(NODE_NAME)
- --proxy-mode=userspace