Announcing Istio 1.1.9

We're pleased to announce the availability of Istio 1.1.9. Please see below for what's changed.

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Bug fixes

• Prevent overly large strings from being sent to Prometheus (Issue 14642).
• Reuse previously cached JWT public keys if transport errors are encountered during renewal (Issue 14638).
• Bypass JWT authentication for HTTP OPTIONS methods to support CORS requests.
• Fix Envoy crash caused by the Mixer filter (Issue 14707).

Small enhancements

• Expose cryptographic signature verification functions to Lua Envoy filters (Envoy Issue 7009).