Container Network Interface (CNI)
Why CNI is required in Kubernetes?
The Container Network Interface (CNI) is an important feature of Kubernetes as it allows containers inside a cluster to communicate smoothly. CNI’s plugin-based architecture provides a flexible and adaptable approach to addressing networking requirements.
Can Kubernetes work without CNI?
To implement the Kubernetes network model, you’ll need a CNI plugin. You must use a CNI plugin that is compatible with the CNI specification version 0.4.0 or later. The Kubernetes project advises using a plugin that is compatible with version 1.
Which CNI should I use?
Flannel and Weavenet provide excellent setup and configuration options. Calico has higher performance since it uses a base network using BGP. Cilium uses a completely different application-layer filtering architecture, BPF, and is primarily focused on enterprise security.
What is Container Interface?
The Container Runtime Interface (CRI) is the primary protocol for communicating between the Kubelet and the Container Runtime. The Kubernetes Container Runtime Interface (CRI) specifies the primary gRPC interface for communicating between the node components kubelet and container runtime.
What is the difference between CNI and CNM?
CNI assumes that the network configuration is in JSON format, which can be saved in a file. While CNM, CNI does not require a distributed key-value store, such as etcd or consul. The CNI plugin is supposed to assign an IP address to the container network interface.
What Is Container Network Interface (CNI) ?
Controlling networks within Kubernetes clusters is mostly dependent on the Container Network Interface (CNI). CNI is an important component of the Kubernetes environment that allows easy networking and communication between containers and other networks. Let’s briefly discuss the Container Network Interface (CNI).