How to split value in telemetry

Policies and Telemetry
1

Hello,

I am looking for syntax that can help to split and take a part of string in logentry. For example current logentry looks like this -

apiVersion: config.istio.io/v1alpha2
kind: logentry
metadata:
name: accesslog
namespace: istio-system
spec:
severity: ‘“Info”’
timestamp: request.time
variables:
clusterName: ‘"{{ .Values.global.clusterName }}"’
sourceIp: source.ip | ip(“0.0.0.0”)
sourcePrincipal: source.principal | “Not_Found”
monitored_resource_type: ‘“UNSPECIFIED”’

Value of “source.principal” is foo.boo.com/abc.xyz.pqr. I was looking to get only abc.xyz.pqr part of the value. Any help is appreciated :slight_smile:

2

Please share suggestions here https://github.com/istio/istio/issues/12454

There is very limited support for string regex parsing in the expression language right now, but it is easy to improve upon, if we know what is needed.

3

Thank you. Will take a look.