Building Multi-Tenant Telecom SaaS on Kubernetes with Cilium eBPF
1. The Challenges of Stateful Telecom in K8s
Unlike standard web microservices, SIP media servers manage sticky RTP UDP socket bindings that cannot be arbitrarily terminated by Kubernetes pod autoscalers.
By leveraging Cilium eBPF host routing and custom pod lifecycle hooks, we achieve smooth zero-downtime rolling upgrades for live telephone calls.
2. Tenant Isolation with Cilium eBPF
Enforcing zero-trust network policies between customer SIP channels prevents cross-tenant packet leakage and simplifies compliance audits.
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Technical Discussion (2)
Moderated Engineering CommunityExtremely insightful breakdown on FreeSWITCH C-module audio piping! We faced similar WebSocket buffer overflow issues when testing at 50,000 active trunks. Implementing 20ms PCM frame slicing solved our jitter spikes immediately.
Quick question regarding the VAD barge-in threshold: How does the spectral power monitor perform when background traffic noise (like emergency sirens or barking) enters the microphone input?