This message occurs when a policy applied in your Istio service mesh has no impact. This might be due to the policy’s configuration incorrectly targeting any workloads or namespaces in your service mesh.
You will receive a message like this:
Warning [IST0167] (Sidecar ns-ambient/namespace-scoped testdata/sidecar-default-selector.yaml:84) The policy has no
impact: namespace is in ambient mode, the policy has no impact.
Warning [IST0167] (Sidecar ns-ambient/pod-scoped testdata/sidecar-default-selector.yaml:90) The policy has no impact:
selected workload is in ambient mode, the policy has no impact.
These messages indicate that the
Sidecar resource is targeting a workload or namespace which is in
ambient mode, meaning that the policy specified in the
Sidecar resource does not have any effect.
How to resolve
To resolve this issue, you first need to check the reason. Currently, the policy is ineffective for the following reasons:
Sidecarresource is targeting a workload or namespace which is in ambient mode.
To resolve this, ensure that the policy is defined correctly or determine if it is necessary. If the namespace/pod was recently added to the ambient mesh, you might have forgotten to remove the policy that is no longer needed, or you may need to update the policy to target the correct workload or namespace.