k8s kubernetes fails initail test

posop

11/18/23, 8:49 PM

I am new to kubernetes and am trying to learn.

I set up 2 VMs and they connect to eachother via a host-only network.

I followed these 2 guides:

How to Install Kubernetes Cluster on Debian 11 with Kubeadm

Deploy Kubernetes Cluster on Debian 11 with Containerd

Everything seems to go well until I get to "9) Test Kubernetes Cluster Installation"

(Master)$ kubectl create deployment nginx-app --image=nginx --replicas 2
deployment.apps/nginx-app created

(Master)$ kubectl expose deployment nginx-app --name=nginx-web-svc --type NodePort --port 80 --target-port 80
service/nginx-web-svc exposed

(Master)$ kubectl describe svc nginx-web-svc
Name:                     nginx-web-svc
Namespace:                default
Labels:                   app=nginx-app
Annotations:              <none>
Selector:                 app=nginx-app
Type:                     NodePort
IP Family Policy:         SingleStack
IP Families:              IPv4
IP:                       10.96.22.154
IPs:                      10.96.22.154
Port:                     <unset>  80/TCP
TargetPort:               80/TCP
NodePort:                 <unset>  30315/TCP
Endpoints:                <none>
Session Affinity:         None
External Traffic Policy:  Cluster
Events:                   <none>

Note: the Endpoints: < none > does not match the expected output in the walkthrough. it has Endpoints: 172.16.126.1:80, 172.16.194.65:80

and when I try and access the exposed port...

(Master)$ curl http://k-worker-01:30315
curl: (7) Failed to connect to k-worker-01 port 30315: Connection refused

Note: in my vm setup I have 2 network adapters

attached to NAT
attached to Host-only Adapter

I can ping in both directions

$ ping -c4 k-worker-01

and

$ ping -c4 k-master

I'm not sure what to try next. Any help is greatly appreciated.

0 + 1

networking

kubernetes

mdaniel

11/19/23, 3:16 AM

Missing `Endpoints` is caused by there being no Pods in `Ready` that match `app=nginx-app`; you'll want to start by [editing your question](https://serverfault.com/posts/1116089/edit) to include `kubectl get -o yaml svc/nginx-web-svc` and `kubectl get -o yaml po -l app=nginx-app` since that cute `kubectl expose` and `kubectl run` stuff is really designed only to make people ask questions, and not for good outcomes

Elon Musk

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