Implement metrics from adguard-exporter (#303)

* implement metrics

testdata/e2e/bin/show-sync-metrics.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+set -e
+
+echo "wait another scrape interval (30s)"
+
+sleep 30
+
+echo "## Pod adguardhome-sync metrics" >> $GITHUB_STEP_SUMMARY
+echo '```' >> $GITHUB_STEP_SUMMARY
+curl http://localhost:9090/metrics -s >> $GITHUB_STEP_SUMMARY
+echo '```' >> $GITHUB_STEP_SUMMARY

testdata/e2e/bin/wait-for-sync.sh

@@ -1,8 +1,14 @@
 #!/bin/bash
 
-kubectl wait --for=jsonpath='{.status.phase}'=Succeeded pod/adguardhome-sync --timeout=1m
-RESULT=$?
-if [[ "${RESULT}" != "0" ]]; then
-  kubectl logs adguardhome-sync
-fi
-exit ${RESULT}
+kubectl wait --for=jsonpath='{.status.phase}'=Running pod/adguardhome-sync --timeout=1m
+
+kubectl port-forward pod/adguardhome-sync 9090:9090 &
+
+for i in {1..6}; do
+  sleep 10
+   RUNNING=$(curl http://localhost:9090/api/v1/status -s | jq -r .syncRunning)
+   echo "SyncRunning = ${RUNNING}"
+   if [[ "${RUNNING}" == "false" ]]; then
+     exit 0
+   fi
+done

testdata/e2e/templates/configmap-sync-env.yaml

@@ -5,8 +5,10 @@ metadata:
   name: sync-conf
   namespace: {{ .Release.Namespace }}
 data:
-  API_PORT: '0'
-  LOG_FORMAT: json
+  API_PORT: '9090'
+  API_METRICS_ENABLED: 'true'
+  API_METRICS_SCRAPE_INTERVAL: '30s'
+  LOG_FORMAT: 'json'
   ORIGIN_URL: 'http://service-origin.{{ $.Release.Namespace }}.svc.cluster.local:3000'
   ORIGIN_PASSWORD: 'password'
   ORIGIN_USERNAME: 'username'

testdata/e2e/templates/configmap-sync-file.yaml

@@ -11,7 +11,10 @@ data:
       username: username
       password: password
     api:
-      port: 0
+      port: 9090
+      metrics:
+        enabled: true
+        scrapeInterval: 30s
     replicas:
       {{- range $i,$version := .Values.replica.versions }}
       - url: 'http://service-replica-{{ $version | toString | replace "." "-" }}.{{ $.Release.Namespace }}.svc.cluster.local:3000'