How to fix kube-proxy Unknown proxy mode "", assuming iptables proxy issue?

Question

I'm new to K8s and struggling with some problems with kube-proxy. I have a service that needs to expose the deployment. Everything seems correct but it does not expose it. I found the problem in kube-proxy logs.

Unknown proxy mode "", assuming iptables proxy

No output for the command iptables-save | grep hostnames

I thought adding --proxy-mode into the kube-proxy manifest would resolve my issue and couldn't find it.

I also tried to check the config file with this command:

ps -ef | grep kube-proxy

Output:

root      1423 24476  0 12:12 pts/0    00:00:00 grep --color=auto kube-proxy
root      8424  8392  0 11:45 ?        00:00:00 /usr/local/bin/kube-proxy --config=/var/lib/kube-proxy/config.conf --hostname-override=
ip-10-0-0-100.us-west-2.compute.internal
root@ip-10-0-0-100:~# find /var/lib/kube-proxy/config.conf
find: ‘/var/lib/kube-proxy/config.conf’: No such file or directory
root@ip-10-0-0-100:~# find  /usr/local/bin/kube-proxy
find: ‘/usr/local/bin/kube-proxy’: No such file or directory

Any leads to help me find my way would highly be appreciated. Thanks!

Answer 1

One of the reason could be the network plugin not being installed out of many possibilities.

In my case, when I received the below error, I wanted to check for the installed CNI plugin.

Unknown proxy mode "", assuming iptables proxy

• Check installed CNI plugin with below command,

  $ ls /etc/cni/net.d
  

• Suppose, it's a weave-net. Then we must look for the objects created for this plug-in with k get all -n kube-system. In my case, I didn't find any objects created for the weave-net. Thus I just installed weave with the below command,

  $ kubectl apply -f "https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d '\n')"
  

---

One more thing to keep in mind,

/var/lib/kube-proxy/config.conf is the mounted location inside the kube-proxy pod. Check the details of ConfigMap named kube-proxy.

kubectl describe configmap kube-proxy -n kube-system