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The future of Kubernetes networking: Cilium and other CNIs with Canonical Kubernetes
- Canonical Kubernetes LTS has integrated Cilium as the default CNI for improved performance, security, and scalability.
- Cilium uses eBPF for high-performance networking, security, and observability, eliminating scalability limitations of traditional CNIs.
- Calico offers robust network policy enforcement and deep security capabilities but may require additional configuration for identity-based security models.
- Flannel is lightweight and simple but lacks built-in support for network policies, limiting its suitability for production environments.
- Multus enables multiple interfaces on Kubernetes pods, useful for NFV and high-performance applications, but adds complexity in setup and management.
- OVN-Kubernetes provides SDN capabilities with native support for Kubernetes policies and benefits from Open vSwitch for hardware acceleration.
- Canonical's choice of Cilium as the default CNI is driven by its performance, security enhancements, observability, service mesh integration, and future-proofing.
- Canonical Kubernetes allows users to choose alternative CNIs like Calico, Flannel, Multus, or OVN-Kubernetes to suit different workloads and environments.
- Detailed official documentation guides users on default networking with Cilium and alternative CNI configurations.
- Canonical Kubernetes users benefit from a cutting-edge networking stack with Cilium as the default CNI while maintaining flexibility to integrate other CNIs seamlessly.
- Future releases of Canonical Kubernetes aim to simplify the deployment and management of complex CNIs like OVN-Kubernetes for enhanced usability.
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