k8wiz
Istio
Easy
Security

Where do you create an Istio PeerAuthentication policy that applies to the whole mesh?

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Answer: In the root namespace, istio-system by default, with no selector

Explanation

A PeerAuthentication in Istio's root namespace without a selector is the mesh-wide policy. A policy without a selector in any other namespace covers only that namespace. Narrower policies win, so namespace and workload policies can still make exceptions to the mesh default.

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