Node Cookbook - Third Edition

Adding logging to Koa

Setting up logging with Koa is very similar to logging with Express. Let's copy the koa-views folder that we created in the There's more... section of the Adding a View Layer recipe and name it koa-logging, we'll also install pino and koa-pino-logger:

$ cp -fr adding-a-view-layer/koa-views koa-logging
$ cd koa-logging
$ npm install --save pino koa-pino-logger
  

Near the top of our index.js we'll add the following:

const pino = require('pino')() 
const logger = require('koa-pino-logger')({ 
  instance: pino 
}) 

Then, still in index.js underneath where we configure view settings, we'll register the logging middleware like so:

app.use(logger) 

At the bottom of index.js we'll update the app.listen callback to use pino.info instead ...