kubeadm集群验证¶
三节点环境搭建完成后，可以通过下面的方式快速验证一下环境是否搭建成功。
kubectl get nodes -o wide
NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
k8s-master Ready control-plane 38m v1.29.2 10.211.55.4 <none> Ubuntu 22.04.2 LTS 5.15.0-76-generic containerd://1.6.28
k8s-worker1 Ready <none> 21m v1.29.2 10.211.55.5 <none> Ubuntu 22.04.2 LTS 5.15.0-97-generic containerd://1.6.28
k8s-worker2 Ready <none> 21m v1.29.2 10.211.55.6 <none> Ubuntu 22.04.2 LTS 5.15.0-76-generic containerd://1.6.28
创建pod¶
创建一个nginx的pod，pod能成功过running
kubectl run web --image nginx
pod/web created
kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
web 1/1 Running 0 63s 10.244.1.2 k8s-worker1 <none> <none>
创建service¶
给nginx pod创建一个service, 通过curl能访问这个service的cluster ip地址。
kubectl expose pod web --port=80 --name=web-service
service/web-service exposed
kubectl get service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 3h53m
web-service ClusterIP 10.98.102.238 <none> 80/TCP 4s
curl 10.98.102.238
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
html { color-scheme: light dark; }
body { width: 35em; margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif; }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
vagrant@k8s-master:~$
环境清理¶
$ kubectl delete service web-service
$ kubectl delete pod web