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Istio DestinationRules: Traffic Policy

DestinationRule configures load balancing, connection pool limits, circuit breakers, and TLS settings for service destinations.

🎯Key Takeaways
DestinationRule = traffic policy (how to reach a destination)
Subsets = label selectors for pod groups (v1, v2)
OutlierDetection = circuit breaker (eject misbehaving pods)

Istio DestinationRules: Traffic Policy

DestinationRule configures load balancing, connection pool limits, circuit breakers, and TLS settings for service destinations.

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What you'll learn
  • DestinationRule = traffic policy (how to reach a destination)
  • Subsets = label selectors for pod groups (v1, v2)
  • OutlierDetection = circuit breaker (eject misbehaving pods)

DestinationRule Capabilities

DestinationRule configures: subsets (label-based pod groups for canary), load balancing (ROUND_ROBIN, LEAST_CONN, RANDOM), connection pool (max connections, pending requests, retries), outlier detection (circuit breaking: eject hosts with >5 consecutive 5xx), and TLS mode (ISTIO_MUTUAL, SIMPLE, DISABLE).

Key takeaways

  • DestinationRule = traffic policy (how to reach a destination)
  • Subsets = label selectors for pod groups (v1, v2)
  • OutlierDetection = circuit breaker (eject misbehaving pods)

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