enabling batch span processor metrics for quoteservice (open-telemetr…

…y#878)

* enabling batch span processor metrics for quoteservice
PHP's batch span processor can emit metrics. There is not yet an async implementation,
so use react's event loop to periodically flush traces and metrics.
Add a grafana chart for some of the batch span processor metrics: dropped, pending, processed, queued

* update changelog

* revert change in selected graph

* Update dependencies

---------

Co-authored-by: Juliano Costa <julianocosta89@outlook.com>

CHANGELOG.md

@@ -21,6 +21,8 @@ release.
  ([#869](https://github.com/open-telemetry/opentelemetry-demo/pull/869))
 * [grafana] fix demo dashboard to be compatible with spanmetrics connector
  ([#874](https://github.com/open-telemetry/opentelemetry-demo/pull/874))
+* [quoteservice] enabling batch span processor metrics
+ ([#878](https://github.com/open-telemetry/opentelemetry-demo/pull/878))
 * [kafka] remove KRaft mode support workarounds
  ([#880](https://github.com/open-telemetry/opentelemetry-demo/pull/880))
 

src/grafana/provisioning/dashboards/general/demo-dashboard.json

@@ -647,9 +647,103 @@
  ],
  "title": "Endpoint Rate by Service",
  "type": "timeseries"
+ },
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "webstore-metrics"
+ },
+ "fieldConfig": {
+ "defaults": {
+ "color": {
+ "mode": "palette-classic"
+ },
+ "custom": {
+ "axisCenteredZero": false,
+ "axisColorMode": "text",
+ "axisLabel": "",
+ "axisPlacement": "auto",
+ "barAlignment": 0,
+ "drawStyle": "line",
+ "fillOpacity": 0,
+ "gradientMode": "none",
+ "hideFrom": {
+ "legend": false,
+ "tooltip": false,
+ "viz": false
+ },
+ "lineInterpolation": "linear",
+ "lineWidth": 1,
+ "pointSize": 5,
+ "scaleDistribution": {
+ "type": "linear"
+ },
+ "showPoints": "auto",
+ "spanNulls": false,
+ "stacking": {
+ "group": "A",
+ "mode": "none"
+ },
+ "thresholdsStyle": {
+ "mode": "off"
+ }
+ },
+ "mappings": [],
+ "thresholds": {
+ "mode": "absolute",
+ "steps": [
+ {
+ "color": "green",
+ "value": null
+ },
+ {
+ "color": "red",
+ "value": 80
+ }
+ ]
+ }
+ },
+ "overrides": []
+ },
+ "gridPos": {
+ "h": 8,
+ "w": 12,
+ "x": 0,
+ "y": 25
+ },
+ "id": 16,
+ "options": {
+ "legend": {
+ "calcs": [],
+ "displayMode": "list",
+ "placement": "bottom",
+ "showLegend": true
+ },
+ "tooltip": {
+ "mode": "single",
+ "sort": "none"
+ }
+ },
+ "targets": [
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "webstore-metrics"
+ },
+ "editorMode": "builder",
+ "expr": "otel_trace_span_processor_spans{service_name=\"quoteservice\"}",
+ "legendFormat": "{{state}}",
+ "range": true,
+ "refId": "A"
+ }
+ ],
+ "title": "Quote Service batch span processor",
+ "type": "timeseries"
  }
  ],
- "schemaVersion": 37,
+ "refresh": "",
+ "revision": 1,
+ "schemaVersion": 38,
  "style": "dark",
  "tags": [],
  "templating": {
@@ -691,6 +785,6 @@
  "timezone": "",
  "title": "Demo Dashboard",
  "uid": "W2gX2zHVk",
- "version": 1,
+ "version": 2,
  "weekStart": ""
-}
+}

src/quoteservice/Dockerfile

@@ -23,7 +23,7 @@ RUN chmod +x /usr/local/bin/install-php-extensions \
  opcache \
  pcntl \
  protobuf \
- opentelemetry-1.0.0beta3
+ opentelemetry-beta
 
 WORKDIR /var/www
 COPY --from=build /tmp/vendor/ ./vendor/

src/quoteservice/composer.json

@@ -6,18 +6,19 @@
  "require": {
  "php": ">= 8.2",
  "ext-json": "*",
+ "ext-pcntl": "*",
  "monolog/monolog": "3.3.1",
- "open-telemetry/api": "1.0.0beta5",
- "open-telemetry/sdk": "1.0.0beta6",
- "open-telemetry/exporter-otlp": "1.0.0beta5",
+ "open-telemetry/api": "1.0.0beta9",
+ "open-telemetry/sdk": "1.0.0beta9",
+ "open-telemetry/exporter-otlp": "1.0.0beta8",
  "open-telemetry/opentelemetry-auto-slim": "1.0.0beta7",
- "guzzlehttp/guzzle": "7.4.5",
- "php-di/php-di": "6.4.0",
- "php-di/slim-bridge": "3.2.0",
+ "guzzlehttp/guzzle": "7.5.1",
+ "php-di/php-di": "7.0.2",
+ "php-di/slim-bridge": "3.3.0",
  "php-http/guzzle7-adapter": "1.0.0",
- "react/http": "v1.8.0",
- "slim/psr7": "1.5",
- "slim/slim": "4.10.0"
+ "react/http": "v1.9.0",
+ "slim/psr7": "1.6.1",
+ "slim/slim": "4.11.0"
  },
  "autoload": {
  "psr-4": {

src/quoteservice/public/index.php

@@ -10,7 +10,12 @@
 use DI\ContainerBuilder;
 use Monolog\Handler\StreamHandler;
 use Monolog\Logger;
+use OpenTelemetry\API\Common\Instrumentation\Globals;
 use OpenTelemetry\API\Common\Log\LoggerHolder;
+use OpenTelemetry\SDK\Common\Configuration\Configuration;
+use OpenTelemetry\SDK\Common\Configuration\Variables;
+use OpenTelemetry\SDK\Metrics\MeterProviderInterface;
+use OpenTelemetry\SDK\Trace\TracerProviderInterface;
 use Psr\Http\Message\ServerRequestInterface;
 use Psr\Log\LogLevel;
 use React\EventLoop\Loop;
@@ -58,6 +63,18 @@
  exit;
 });
 
+/* workaround for non-async batch processors */
+if (($tracerProvider = Globals::tracerProvider()) instanceof TracerProviderInterface) {
+ Loop::addPeriodicTimer(Configuration::getInt(Variables::OTEL_BSP_SCHEDULE_DELAY)/1000, function() use ($tracerProvider) {
+ $tracerProvider->forceFlush();
+ });
+}
+if (($meterProvider = Globals::meterProvider()) instanceof MeterProviderInterface) {
+ Loop::addPeriodicTimer(Configuration::getInt(Variables::OTEL_METRIC_EXPORT_INTERVAL)/1000, function() use ($meterProvider) {
+ $meterProvider->forceFlush();
+ });
+}
+
 $server = new HttpServer(function (ServerRequestInterface $request) use ($app) {
  $response = $app->handle($request);
  echo sprintf('[%s] "%s %s HTTP/%s" %d %d %s',