driftwood-redis-logger

A driftwood logger that persists logs to redis and provides a CLI utility for searching/streaming said logs.

Installation

Logger

Augment your root drifwood logger with the redis logger, giving it an instance of redis and some options:

const createLogger = require('driftwood')
const createRedisLogger = require('driftwood-redis-logger')
const Redis = require('ioredis')

// Create an instance of ioredis
const redis = Redis()

// Create the redis logger as an additional logger to pass to driftwood
const additionalLoggers = [createRedisLogger(redis)]

// Create driftwood, passing in the additional loggers
module.exports = createLogger('my-app', additionalLoggers)

CLI

Create a file called bin/log in your app that pulls in the logger CLI:

#!/usr/bin/env node

// Function that returns a redis instance based on the environment given
function getRedis (environment) {
  return new Redis()
}

require('driftwood-redis-logger/cli')(getRedis)

After making it executable (chmod +x ./bin/log) you can then invoke it: ./bin/log --help. For ease of use, you could add it to your npm run scripts or to a Makefile.

API

createRedisLogger(redis, {options})

Creates the logger. redis should be an instance of ioredis. options is optional, and can contain the following keys:

• key: key to use for the list that will contain the logs, defaults to driftwood-logs
• channel: channel to publish logs on, defaults to driftwood-logs
• limit: number of logs to keep, defaults to 100000
• publish: whether to publish logs, defaults to true. If disabled you cannot use the stream functionality in the CLI.

require('driftwood-redis-logger/cli')(getRedis(environment), options)

Runs the CLI utility. getRedis() should be a function that receives the current environment and returns an instance of ioredis for that environment. options is optional and can contain the following keys:

• key: key for the list that will contain the logs, defaults to driftwood-logs
• channel: channel to listen for logs on, defaults to driftwood-logs