Calico is a powerful networking and network security solution for containers, virtual machines, and native host-based workloads. It is widely used in Kubernetes environments to provide networking and network policy enforcement. Calico's primary purpose is to offer scalable and efficient networking for cloud-native applications, ensuring secure and reliable communication between pods and services.
In this scenario, the symptom observed is that a Calico node is unable to access a specific namespace. This can manifest as network policies not being applied correctly, or pods within the namespace being unreachable from other nodes or namespaces.
The error code CALICO-1035 indicates a problem where a Calico node cannot access a particular namespace. This issue often arises due to misconfigurations in the namespace settings or network policies that inadvertently restrict access.
To resolve the CALICO-1035 issue, follow these steps:
Ensure that the namespace is correctly configured. Use the following command to check the namespace details:
kubectl get namespace -o yaml
Look for any misconfigurations in labels or annotations that might affect network policies.
Check the network policies applied to the namespace. Use the command:
kubectl get networkpolicy -n
Ensure that the policies allow the desired traffic. You can find more information on configuring network policies in the Calico Network Policy documentation.
Ensure that the Calico components have the necessary permissions to manage the namespace. Verify the RBAC settings using:
kubectl get roles,rolebindings,clusterroles,clusterrolebindings -n
Adjust the permissions if needed to ensure Calico can function correctly.
By following these steps, you should be able to diagnose and resolve the CALICO-1035 issue, ensuring that your Calico node can access the specified namespace. For further assistance, consult the Calico Documentation or reach out to the community for support.
(Perfect for DevOps & SREs)
(Perfect for DevOps & SREs)
