--- title: List Entry overview: A template designed to let you perform list checking operations. location: https://istio.io/docs/reference/config/template/listentry.html layout: protoc-gen-docs number_of_entries: 1 ---

The listentry template is designed to let you perform list check operations with the list adapter.

Template

The listentry template is used to verify the presence/absence of a string within a list.

When writing the configuration, the value for the fields associated with this template can either be a literal or an expression. Please note that if the datatype of a field is not istio.mixer.adapter.model.v1beta1.Value, then the expression’s inferred type must match the datatype of the field.

Example config:

apiVersion: "config.istio.io/v1alpha2"
kind: listentry
metadata:
  name: appversion
  namespace: istio-system
spec:
  value: source.labels["version"]
Field Type Description
value string

Specifies the entry to verify in the list.