I'm having trouble connecting my Kubernetes pods to a server that exists outside of the cluster. I set up my cluster without specifying any networking options during the kubeadm init. My pods are assigned IPs in the range of 10.0.0.x, while I need to access a server located at 10.65.22.4. My host machine can connect to this server without issues, but when my pods try to access it, they just timeout. It seems like the traffic might be routed back into Kubernetes. I want my pods to be able to send traffic out to the wider network when they hit this specific IP or even the fully qualified domain name. I've read that NetworkPolicies, particularly egress ones, could be what I need to look into, but I'm not entirely sure. The server I'm trying to reach is at internal.mydomain.com, which resolves to 10.65.22.4, and my pods can't seem to access it.
2 Answers
Have you set up a Container Network Interface (CNI) for your Kubernetes cluster? If not, that's likely causing the connectivity issues since routing might not be configured correctly without it.
With the default setup for Cilium, make sure it's configured properly to handle traffic between your pods and external IPs. Sometimes default settings can cause unexpected routing behavior.
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