logger.js

/**
 * Logger | Bunyan
 */
const bunyan = require('bunyan')
const path = require('path');
const config = require('./config');

module.exports = () => {
    function reqSerializer(req) {
        return {
            method: req.method,
            url: req.url,
            headers: req.headers,
        };
    }
    const logger = bunyan.createLogger({
        name: config.name,
        src: true,
        streams: [{
                type: 'rotating-file',
                level: 'info', // loging level
                path: config.env === 'development' ? path.resolve(__dirname, 'log/development-info.log') : path.resolve(__dirname, 'log/production-info.log'),
                period: '1d', // daily rotation
                count: 3, // keep 3 back copies
            },
            {
                type: 'rotating-file',
                level: 'fatal', // loging level
                path: config.env === 'development' ? path.resolve(__dirname, 'log/development-fatal.log') : path.resolve(__dirname, 'log/production-fatal.log'),
                period: '1d', // daily rotation
                count: 3, // keep 3 back copies
            },
            {
                type: 'rotating-file',
                level: 'error', // loging level
                path: config.env === 'development' ? path.resolve(__dirname, 'log/development-error.log') : path.resolve(__dirname, 'log/production-error.log'),
                period: '1d', // daily rotation
                count: 3, // keep 3 back copies
            },
            {
                type: 'rotating-file',
                level: 'warn', // loging level
                path: config.env === 'development' ? path.resolve(__dirname, 'log/development-warn.log') : path.resolve(__dirname, 'log/production-warn.log'),
                period: '1d', // daily rotation
                count: 3, // keep 3 back copies
            },
            {
                type: 'rotating-file',
                level: 'debug', // loging level
                path: config.env === 'development' ? path.resolve(__dirname, 'log/development-debug.log') : path.resolve(__dirname, 'log/production-debug.log'),
                period: '1d', // daily rotation
                count: 3, // keep 3 back copies
            },
            {
                type: 'rotating-file',
                level: 'trace', // loging level
                path: config.env === 'development' ? path.resolve(__dirname, 'log/development-trace.log') : path.resolve(__dirname, 'log/production-trace.log'),
                period: '1d', // daily rotation
                count: 3, // keep 3 back copies
            },
        ],
        serializers: {
            req: reqSerializer,
        },
    });
    return logger;
};