istio.io/content/en/docs/reference/config/analysis/ist0122/index.md

title	layout	owner	test
InvalidRegexp	analysis-message	istio/wg-user-experience-maintainers	no

This message occurs when an Istio resource contains an invalid regular expression.

Istio regular expressions use the RE2 regular expression syntax.

Example

You will receive this message:

{{< text plain >}} Warning [IST0122] (VirtualService bad-match.default) Field "uri" regular expression invalid: "[A-Z" (error parsing regexp: missing closing ]: [A-Z) {{< /text >}}

when your cluster has following virtual service:

{{< text yaml >}} apiVersion: networking.istio.io/v1alpha3 kind: VirtualService metadata: name: bad-match spec: hosts:

• "*" gateways:
• bookinfo-gateway http:
• match:
  • uri: regex: "[A-Z" route:
  • destination: host: productpage {{< /text >}}

In this example, the regex [A-Z does not follow the RE2 syntax.