#!/bin/bash
# shellcheck disable=SC2034,SC2153,SC2155,SC2164

# Copyright Istio Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

####################################################################################################
# WARNING: THIS IS AN AUTO-GENERATED FILE, DO NOT EDIT. PLEASE MODIFY THE ORIGINAL MARKDOWN FILE:
#          docs/tasks/observability/metrics/customize-metrics/index.md
####################################################################################################

snip_enable_custom_metrics_1() {
cat <<EOF > ./custom_metrics.yaml
apiVersion: telemetry.istio.io/v1alpha1
kind: Telemetry
metadata:
  name: namespace-metrics
spec:
  metrics:
  - providers:
    - name: prometheus
    overrides:
    - match:
        metric: REQUEST_COUNT
      tagOverrides:
        destination_port:
          value: "string(destination.port)"
        request_host:
          value: "request.host"
EOF
kubectl apply -f custom_metrics.yaml
}

snip_verify_the_results_1() {
curl "http://$GATEWAY_URL/productpage"
}

snip_verify_the_results_2() {
kubectl exec "$(kubectl get pod -l app=productpage -o jsonpath='{.items[0].metadata.name}')" -c istio-proxy -- curl -sS 'localhost:15000/stats/prometheus' | grep istio_requests_total
}

! read -r -d '' snip_use_expressions_for_values_1 <<\ENDSNIP
has(request.host) ? request.host : "unknown"
ENDSNIP