feat(backend): use pino logger for json formatting, add vector sink s…

…ignoz conf

backend/sink-signoz.toml

@@ -0,0 +1,22 @@
+[transforms.parse]
+inputs = [ "pipe"]
+type = "remap"
+source = '''
+  .parsed_timestamp = parse_timestamp!(.timestamp, format: "%Y-%m-%dT%H:%M:%S.%fZ")
+  if is_timestamp(.parsed_timestamp) {
+    .timestamp = to_unix_timestamp(.parsed_timestamp)
+  } else {
+    .timestamp = to_unix_timestamp(now())
+  }
+  . = parse_json(slice!(.message, start: 44)) ?? .
+'''
+
+[sinks.hook]
+type = "http"
+inputs = ["parse"]
+encoding.codec = "json"
+uri = "${SIGNOZ_URI}"
+method = "post"
+
+[sinks.hook.request.headers]
+signoz-access-token = "${SIGNOZ_TOKEN}"

backend/src/app.module.ts

@@ -1,6 +1,7 @@
 import { Module } from '@nestjs/common';
 import { ConfigModule } from '@nestjs/config';
 import { SentryModule } from '@sentry/nestjs/setup';
+import { LoggerModule } from 'nestjs-pino';
 import { AuthModule } from './auth/auth.module';
 import { CollectivitesModule } from './collectivites/collectivites.module';
 import { CommonModule } from './common/common.module';
@@ -17,6 +18,33 @@ import { TrpcRouter } from './trpc/trpc.router';
 
 @Module({
   imports: [
+    LoggerModule.forRoot({
+      pinoHttp: {
+        messageKey: process.env.NODE_ENV === 'production' ? 'message' : 'msg',
+        formatters:
+          process.env.NODE_ENV === 'production'
+            ? {
+                level: (label, number) => {
+                  // Compliant with https://opentelemetry.io/docs/specs/otel/logs/data-model/
+                  return {
+                    severity_number: number,
+                    severity_text: label,
+                  };
+                },
+              }
+            : undefined,
+        transport:
+          process.env.NODE_ENV === 'production'
+            ? undefined // Default configuration to console in json
+            : {
+                target: 'pino-pretty',
+                options: {
+                  singleLine: true,
+                  colorize: true,
+                },
+              },
+      },
+    }),
     SentryModule.forRoot(),
     ConfigModule.forRoot({
       ignoreEnvFile: process.env.NODE_ENV === 'production', // In production, environment variables are set by the deployment

backend/src/main.ts

@@ -2,24 +2,26 @@
 import './common/services/sentry.service';
 // Other imports
 import { patchNestjsSwagger, ZodValidationPipe } from '@anatine/zod-nestjs';
-import { Logger } from '@nestjs/common';
 import { HttpAdapterHost, NestFactory } from '@nestjs/core';
 import { DocumentBuilder, SwaggerModule } from '@nestjs/swagger';
+import { Logger } from 'nestjs-pino';
 import { AppModule } from './app.module';
 import { AllExceptionsFilter } from './common/filters/all-exceptions.filter';
 import { initApplicationCredentials } from './common/services/gcloud.helper';
 import { TrpcRouter } from './trpc/trpc.router';
 
-const logger = new Logger('main');
 const port = process.env.PORT || 8080;
-logger.log(`Launching NestJS app on port ${port}`);
 
 async function bootstrap() {
   initApplicationCredentials();
 
   const app = await NestFactory.create(AppModule, {
     logger: ['fatal', 'error', 'warn', 'log'], // No debug by default
   });
+  const logger = app.get(Logger);
+  logger.log(`Launching NestJS app on port ${port}`);
+  app.useLogger(logger);
+
   const { httpAdapter } = app.get(HttpAdapterHost);
 
   app.enableCors();

package.json

@@ -77,8 +77,11 @@
     "leaflet-defaulticon-compatibility": "^0.1.2",
     "lodash": "^4.17.21",
     "luxon": "^3.5.0",
+    "nestjs-pino": "^4.1.0",
     "next": "^14.2.16",
     "nodemailer": "^6.9.14",
+    "pino-http": "^10.3.0",
+    "pino-pretty": "^13.0.0",
     "postgres": "^3.4.4",
     "posthog-js": "^1.131.3",
     "react": "18.3.1",