Rate Limiting with Istio
Local and global rate limiting using Envoy filters and Redis-backed rate limit service to protect services from overload.
Rate Limiting with Istio
Local and global rate limiting using Envoy filters and Redis-backed rate limit service to protect services from overload.
What you'll learn
- Local rate limiting: per-Envoy, approximate across replicas
- Global rate limiting: uses Redis rate limit service (accurate)
- Configure via EnvoyFilter or Istio RateLimitPolicy
Istio Rate Limiting Patterns
Istio supports two rate limiting approaches: local (per-proxy, fast, no external dependency — approximate across replicas) and global (shared state via Redis rate limit service — accurate, requires Redis). Use local for protection; global for billing/quota enforcement.
Key takeaways
- Local rate limiting: per-Envoy, approximate across replicas
- Global rate limiting: uses Redis rate limit service (accurate)
- Configure via EnvoyFilter or Istio RateLimitPolicy
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Discussion
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