I'm trying to setup a kubernetes cluster with kubeadm and vagrant. I faced an error during installing nginx ingress controller was timeout when the pods is trying to retrieve the configmap through kubernetes API. I have looked around and trying to apply their solution, still no luck, this is the reason I come out with this post.

Environment:

I'm using vagrant to setup 2 nodes with ubuntu/xenial image.

kmaster
-------------------------------------------
network:
Adapter1: NAT
Adapter2: HostOnly-network, IP:192.168.2.71

kworker1
-------------------------------------------
network:
Adapter1: NAT
Adapter2: HostOnly-network, IP:192.168.2.72

I followed the kubeadm to setup the cluster

[Setup kubernetes with kubeadm]

And my kube cluster init command as below:

kubeadm init --pod-network-cidr=192.168.0.0/16 --apiserver-advertise-address=192.168.2.71

and apply calico network plugin policy:

kubectl apply -f \
https://docs.projectcalico.org/v3.4/getting-started/kubernetes/installation/hosted/etcd.yaml

kubectl apply -f \
https://docs.projectcalico.org/v3.4/getting-started/kubernetes/installation/hosted/calico.yaml

(Calico is a plugin I currently successful installed with, I will come out another post for flannel plugin which the plugin unable to access the service)

I'm using helm to install ingress controller followed the tutorial https://kubernetes.github.io/ingress-nginx/deploy/

That's the error occurred once I applied helm deploy command when I describe the pod

Appreciate someone can help, as I know the reason was the pod unable to access kubernetes API. But not this already should enable by kubernetes by default?

My kubesystem pods status as below:

Another solution provided from kubernetes official website:

1) install kube-proxy with sidecar, I still new with kubernetes and I'm looking for example how to install kube-proxy with sidecar. Appreciate if someone could provide an example.

2) use client-go, I'm very confuse when I read this post, it seems that using go command to pull the go script, and I have no clue how's it working with kubernetes pods.