feat: foundation — Docker Compose, OTEL, shared types (#65)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

apps/gateway/src/tracing.ts

@@ -0,0 +1,42 @@
+import { NodeSDK } from '@opentelemetry/sdk-node';
+import { getNodeAutoInstrumentations } from '@opentelemetry/auto-instrumentations-node';
+import { OTLPTraceExporter } from '@opentelemetry/exporter-trace-otlp-http';
+import { OTLPMetricExporter } from '@opentelemetry/exporter-metrics-otlp-http';
+import { PeriodicExportingMetricReader } from '@opentelemetry/sdk-metrics';
+import { resourceFromAttributes } from '@opentelemetry/resources';
+import { ATTR_SERVICE_NAME, ATTR_SERVICE_VERSION } from '@opentelemetry/semantic-conventions';
+
+const otlpEndpoint = process.env['OTEL_EXPORTER_OTLP_ENDPOINT'] ?? 'http://localhost:4318';
+
+const sdk = new NodeSDK({
+  resource: resourceFromAttributes({
+    [ATTR_SERVICE_NAME]: process.env['OTEL_SERVICE_NAME'] ?? 'mosaic-gateway',
+    [ATTR_SERVICE_VERSION]: '0.0.0',
+  }),
+  traceExporter: new OTLPTraceExporter({
+    url: `${otlpEndpoint}/v1/traces`,
+  }),
+  metricReader: new PeriodicExportingMetricReader({
+    exporter: new OTLPMetricExporter({
+      url: `${otlpEndpoint}/v1/metrics`,
+    }),
+    exportIntervalMillis: 15_000,
+  }),
+  instrumentations: [
+    getNodeAutoInstrumentations({
+      '@opentelemetry/instrumentation-fs': { enabled: false },
+      '@opentelemetry/instrumentation-dns': { enabled: false },
+    }),
+  ],
+});
+
+sdk.start();
+
+process.on('SIGTERM', () => {
+  sdk
+    .shutdown()
+    .then(() => process.exit(0))
+    .catch(() => process.exit(1));
+});
+
+export { sdk };