👀 Views: 1598 💬 Answers: 1 📅 Created: 2025-06-13

kubernetes calico networking host-network yaml

I'm a bit lost with I'm working through a tutorial and I'm prototyping a solution and I'm facing a networking issue in my Kubernetes cluster where pods are not able to communicate with each other when they are running in host network mode using Calico... My deployment YAML includes a configuration for host networking, but the pods seem to be isolated from each other. Here's the relevant section of my deployment: ```yaml apiVersion: apps/v1 kind: Deployment metadata: name: my-app spec: replicas: 3 selector: matchLabels: app: my-app template: metadata: labels: app: my-app spec: hostNetwork: true containers: - name: my-container image: my-image:latest ports: - containerPort: 80 ``` I've verified that the Calico CNI is installed and running on the cluster (v1.24). However, when I try to access services in other pods using their host IP addresses, I get timeouts. My understanding is that using host networking should allow direct access to the host's network stack, but something seems off. I've attempted to troubleshoot by checking the Calico logs and verifying that the network policies are not restricting access, but everything appears to be configured correctly. I also ensured that the pods are indeed running on the same node to rule out any inter-node communication issues. Interestingly, when I switch the `hostNetwork` flag to `false`, the pods can communicate with each other just fine, which makes me think the issue is isolated to when host networking is enabled. Is there something specific about Calico's configuration or best practices for using host networking that I might be missing? Any insights on how to resolve this would be greatly appreciated. This is part of a larger API I'm building. How would you solve this? I'd be grateful for any help. Any help would be greatly appreciated! I recently upgraded to Yaml LTS. What would be the recommended way to handle this?