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Project Calico

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description Project Calico Overview

Project Calico provides a secure and flexible networking layer for containerized applications. It leverages Kubernetes’ Container Network Interface (CNI) to deliver network policy enforcement, routing capabilities, and IP address management. Primarily used by DevOps teams and system administrators managing Kubernetes clusters, Calico ensures robust security and efficient network operations within complex environments. It utilizes Tigera technology for enhanced performance and control.

help Project Calico FAQ

What does Project Calico do in Kubernetes?

Project Calico provides container networking and network policy enforcement for Kubernetes clusters. Teams use it to control which pods, namespaces, and services can talk to each other instead of leaving the cluster network wide open.

Is Calico a CNI plugin?

Yes, Calico is commonly deployed as a Kubernetes CNI plugin. It handles pod networking and can also enforce Kubernetes NetworkPolicy plus Calico's own extended policy model.

Why do people mention BGP with Calico?

Calico can use BGP routing to advertise pod network routes without relying on an overlay in some cluster designs. That is one reason it is popular in bare-metal and infrastructure-heavy Kubernetes environments.

How is Calico different from Cilium?

Calico is known for network policy, routing, and broad Kubernetes adoption, while Cilium is strongly associated with eBPF-based networking and observability. The better choice depends on the cluster's routing model, policy needs, and whether the team wants eBPF features.

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