Kubernetes status hang on Pending status - kubernetes

Question

I tried multiple times and searched a lot but could not figure out why my pod is still in Pending status.
I have a very simple docker-compose.yml file as below:
version: '3'
services:
nginx:
build: .
container_name: "something_cool"
ports:
- '80:80'
and converted it to Kubernetes syntax with kompose command, so it created the two deployment and service files as below.
Deployment:
apiVersion: apps/v1
kind: Deployment
metadata:
annotations:
kompose.cmd: kompose convert
kompose.version: 1.22.0 (955b78124)
creationTimestamp: null
labels:
io.kompose.service: nginx
name: nginx
spec:
replicas: 1
selector:
matchLabels:
io.kompose.service: nginx
strategy: {}
template:
metadata:
annotations:
kompose.cmd: kompose convert
kompose.version: 1.22.0 (955b78124)
creationTimestamp: null
labels:
io.kompose.service: nginx
spec:
containers:
- image: nginx
name: something-cool
ports:
- containerPort: 80
resources: {}
restartPolicy: Always
status: {}
Service:
apiVersion: v1
kind: Service
metadata:
annotations:
kompose.cmd: kompose convert
kompose.version: 1.22.0 (955b78124)
creationTimestamp: null
labels:
io.kompose.service: nginx
name: nginx
spec:
ports:
- name: "80"
port: 80
targetPort: 80
selector:
io.kompose.service: nginx
status:
loadBalancer: {}
Now that when I run kubectl apply -k ., I see service/nginx configured and deployment.apps/nginx configured, but kubectl get pods shows it in Pending status.
This is the result of grepping pod name in events:
6s Warning FailedScheduling pod/nginx-77546f7866-j5gmd 0/3 nodes are available: 1 node(s) had taint {node-role.kubernetes.io/master: }, that the pod didn't tolerate, 2 node(s) had taint {node.kubernetes.io/unreachable: }, that the pod didn't tolerate.
4m4s Warning FailedScheduling pod/nginx-77546f7866-j5gmd 0/3 nodes are available: 1 node(s) had taint {node-role.kubernetes.io/master: }, that the pod didn't tolerate, 2 node(s) had taint {node.kubernetes.io/unreachable: }, that the pod didn't tolerate.
5m6s Normal SuccessfulCreate replicaset/nginx-77546f7866 Created pod: nginx-77546f7866-j5gmd
If I'm correct, I see that I can ping and nslookup kubernetes.io fine, but I'm not sure why I'm getting this error.

Answer 1

I solve the issue first by resetting the Kubernetes by the below ways:
kubeadm reset
rm ~/.kube/config
kubeadm init --pod-network-cidr=10.244.0.0/16
kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
kubectl apply -k .