description Cilium Overview
Networking and network security are Cilium's focus within container environments, especially Kubernetes. It uses extended Berkeley Packet Filter, or eBPF, technology to run networking logic within the Linux kernel. This supports traffic handling and fine-grained policies that control communication between workloads. Cilium is a networking component, rather than the software responsible for starting containers.
Organizations running complex container deployments can use it to connect services and investigate their traffic. Its associated Hubble observability tools help make communication flows visible, which is useful when diagnosing connectivity failures or reviewing policy behavior. Cilium suits platform and security teams that need networking, access controls, and traffic visibility to work together within their Kubernetes infrastructure.
help Cilium FAQ
What open-source technology does Cilium use to manage container networking?
Cilium is an open-source networking and observability solution for Kubernetes that operates primarily using eBPF (Extended Berkeley Packet Filter). This allows it to enforce network policies directly within the Linux kernel without needing complex kube-proxy rules.
What problems does Cilium solve for Kubernetes environments?
By leveraging eBPF, Cilium provides deep visibility into application traffic and secures connections between microservices. It dramatically improves network routing efficiency and bypasses the limitations of traditional iptables-based networking.
Is Cilium certified for use in production Kubernetes environments?
Yes, Cilium is a graduated project within the Cloud Native Computing Foundation (CNCF), meaning it is highly stable and widely used in production. Major tech companies rely on it to manage massive-scale container platforms.
Does Cilium offer tools for debugging network issues?
Cilium includes a powerful observability tool called Hubble, which is built on top of the eBPF data layer. Hubble provides real-time service maps and flow visibility, making it incredibly easy to troubleshoot network connectivity issues.
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