NestJS: How to set global log level for different environments

Question

I am using the NestJS in-built logger. I couldn't find an option to set the global log level. For e.g. log level as 'verbose' for dev environment and log level as 'error' for prod environment.

Also, is there an option to disable the stuff that NestJS adds in the output i.e timestamp and other info and only log the message? I need this as we use Kibana logs and it automatically adds the required fields.

Answer 1

You can set up log levels in your main.ts file:

const app = await NestFactory.create(AppModule, {
  logger: process.env.NODE_ENV === 'development' ? ['log', 'debug', 'error', 'verbose', 'warn'] : ['error', 'warn'],
});

Answer 2

You can write your own Logger with that logic and use it as a service or you can set it globally

export class MyLogger extends Logger {
  error(message: string, trace: string) {
    // add your tailored logic here
    super.error(message, trace);
  }
}

---

const app = await NestFactory.create(ApplicationModule, {
  logger: new MyLogger(),
});