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InfoQMark Silvester2 min readrelease notesintermediate

Istio 1.31 Adds Agentgateway Waypoints and Moves Release Artifacts off Google Cloud

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Summary

Istio 1.31 adds a Rust‑based agentgateway waypoint proxy for ambient meshes and introduces traffic‑shifting canary labels, zone‑aware load‑balancing, and dynamic DNS outbound mode. It also retires Google‑hosted image and Helm repositories, requiring users to migrate before the October outage.

  • Agentgateway waypoint proxy (istio-agentgateway-waypoint) enables L7 waypoint in ambient mesh using a Rust data plane.
  • Traffic shifting uses use-waypoint-canary label and weight annotation; only new connections are split, existing ones stay on primary waypoint.
  • zoneAwareLbSetting on DestinationRule/MeshConfig lets Envoy prefer same‑zone endpoints and spill over automatically.
  • ALLOW_ANY_DYNAMIC_DNS outbound mode resolves hostnames from the HTTP Host header at request time, removing per‑host ServiceEntry requirements.

Istio operators need to adopt the new waypoint capabilities and migrate artifact locations to avoid service disruption and leverage improved traffic management.

6/10
securityrusttraffic managementkubernetesistioservice mesh

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