How to resolve the issue of being unable to access the page outside the k8s cluster?

If you are experiencing issues accessing pages outside of your Kubernetes (k8s) cluster, there may be several possible reasons and solutions: 1. Check the network configuration: Ensure that the network configuration of your Kubernetes cluster is correct. You can check the network configuration files of the cluster, such as the configuration files of CNI plugins (such as Calico, Flannel, etc.), to ensure that the network plugins are working properly. You can also check if the firewall rules and network policies are set up correctly. 2. Check the service configuration: If your application is exposed through Kubernetes services, make sure that the service configuration is correct. Check the port and IP address settings in the service configuration files (such as Service and Ingress objects) and ensure that the services are running properly. 3. Check DNS resolution: If you are accessing pages using domain names, ensure that the DNS resolution configuration is correct. You can test if DNS resolution is working properly by running the nslookup or dig command outside of the cluster. If DNS resolution is incorrect, you can check if the Kubernetes DNS service is running properly within the cluster. 4. Check network connectivity: If your cluster is located in a private network, ensure that the network connectivity is working properly. You can try pinging the nodes or service IP addresses within the cluster from a machine outside of the cluster to check if the network connectivity is normal. 5. Check firewall rules: If your cluster is hosted on a public cloud, make sure that the firewall rules are set up correctly. Check the firewall configuration of the cloud platform to ensure that the relevant ports for external access to the cluster are allowed. If none of the above methods solve the issue, you can check the logs and events within the cluster to see if there are any error messages. You can also refer to the Kubernetes documentation and community support forums for more guidance and advice on resolving such issues.