logglyfy

logglyfy

This is an opinionated thin wrapper around the de facto Loggly module created by Nodejitsu. The purpose of this wrapper is give you an easy interface for logging JSON objects. This module was build to suit my own needs, and may not be equally useful for everybody ;)

Assumptions:

• You already use a syslog drain to send regular STDOUT log entries to Loggly

Benefits of this module:

• Integrate Loggly into your app with only one line of code
• Add support for log-levels (debug, info, warn, error)
• Allow you to log to STDOUT and to Loggly at the same time

This module uses convention over configuration, so expect sensible defaults in place of tidies configuration.

Installation

npm install logglyfy

Configure the module using environment variables. The only required pieces of information needed are:

• LOGGLY_TOKEN
• LOGGLY_SUBDOMAIN

Basic usage

The most basic usage of the Logglyfy module is logging a plain text message to STDOUT:

var log = require('logglyfy');

log.info('this is a simple log entry');

Note that this will not directly send the log entry to Loggly. Instead it's expected that you already have a way of sending syslog to Loggly.

Log text to STDOUT and send JSON to Loggly at the same time:

log.info('a user just signed in', { action: 'signin', user_id: 123 });

Logglyfy of cause supports printf-styled params:

var userId = 123;
log.info('user %d signed in', userId, { action: 'signin', user_id: userId });

You can also tag your JSON Loggly entries, in this case with the tag user:

log.info('a user just signed in', { action: 'signin', user_id: 123 }, ['user']);

You can of cause mix and match:

var userId = 123;
var role = 'moderator';
log.info('user %d signed in (role: %s)', userId, role,
         { action: 'signin', user_id: userId, role: role },
         ['user']);

Log levels

Logglyfy supports the following log-levels: debug, info, warn, and error

log.debug(...); // ignored by default, set LOG_LEVEL=debug to enable
log.info(...);
log.warn(...);
log.error(...);

The level will be outputted to STDOUT along with the log message, e.g.

log.warn('this is a warning'); // Output: [warn] this is a warning

The level will be added to the JSON object sent to Loggly along with a timestamp. The following code will send {"level":"warn","timestamp":"2014-05-20T17:19:12.251Z","foo":true} to Loggly:

log.warn('this is a warning', { foo: true });

Advanced usage

Access the wrapped Loggly module directly via the log.loggly property:

log.loggly.search('404', function () { /* ... */ })
              .on('rsid', function (rsid) { /* ... */ })

The following aliases have been made available directly on the Logglyfy module:

• log.search() alias for log.loggly.search()
• log.logglyUrl() alias for log.loggly.logglyUrl()
• log.customer() alias for log.loggly.customer()
• log.tagFilter() alias for log.loggly.tagFilter()

Optional environment variables:

• LOG_LEVEL - Set to debug, info, warn, or error
• LOGGLY_TAGS - a comma seperated list of Loggly tags to add by default to all log-entries
• LOGGLY_USERNAME and LOGGLY_PASSWORD - the Nodejitsu Loggly module allows you to retrieve the customer information from the Loggly API. To support this the module needs your Loggly username and password. If you don't need this feature, there is no need to supply this information

License

MIT