Act::Fluent::Logger::Rails

Fluent logger.

Supported versions

• Rails 4, 5, 6

Installation

Add this line to your application's Gemfile:

gem 'act-fluent-logger-rails'

And then execute:

$ bundle

Or install it yourself as:

$ gem install act-fluent-logger-rails

Usage

in config/environments/production.rb

config.log_level = :info
config.logger = ActFluentLoggerRails::Logger.
  new(log_tags: {
        ip: :ip,
        ua: :user_agent,
        uid: ->(request) { request.session[:uid] }
      })

Don't use config.log_tags.

To define where to send messages to, either:

create config/fluent-logger.yml

development:
  fluent_host:   '127.0.0.1'
  fluent_port:   24224
  tag:           'foo'
  messages_type: 'string'
  severity_key:  'level'     # default severity

test:
  fluent_host:   '127.0.0.1'
  fluent_port:   24224
  tag:           'foo'
  messages_type: 'string'
  severity_key:  'level'     # default severity

production:
  fluent_host:   '127.0.0.1'
  fluent_port:   24224
  tag:           'foo'
  messages_type: 'string'
  severity_key:  'level'     # default severity

set an environment variable FLUENTD_URL

http://fluentd.example.com:42442/foo?messages_type=string&severity_key=level

pass a settings object to ActFluentLoggerRails::Logger.new

config.logger = ActFluentLoggerRails::Logger.
  new(settings: {
        host: '127.0.0.1',
        port: 24224,
        tag: 'foo',
        messages_type: 'string',
        severity_key: 'level'
      })

Setting

• fluent_host: The host name of Fluentd.
• fluent_port: The port number of Fluentd.
• tag: The tag of the Fluentd event.
• messages_type: The type of log messages. 'string' or 'array'. If it is 'string', the log messages is a String.

2013-01-18T15:04:50+09:00 foo {"messages":"Started GET \"/\" for 127.0.0.1 at 2013-01-18 15:04:49 +0900\nProcessing by TopController#index as HTML\nCompleted 200 OK in 635ms (Views: 479.3ms | ActiveRecord: 39.6ms)"],"severity":"INFO"}

If it is 'array', the log messages is an Array.

2013-01-18T15:04:50+09:00 foo {"messages":["Started GET \"/\" for 127.0.0.1 at 2013-01-18 15:04:49 +0900","Processing by TopController#index as HTML","Completed 200 OK in 635ms (Views: 479.3ms | ActiveRecord: 39.6ms)"],"severity":"INFO"}

• severity_key: The key of severity(DEBUG, INFO, WARN, ERROR).

You can add any tags at run time.

logger[:foo] = "foo value"

Usage as a standalone logger

Typical usage is as a replacement for the default Rails logger, in which case messages are collected and flushed automatically as part of the request lifecycle. If you wish to use it instead as a separate logger and log to it manually then it is necessary to initialize with the flush_immediately flag.

ActFluentLoggerRails::Logger.new(flush_immediately: true)

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request

How to run test with appraisal

gem install appraisal
bundle exec appraisal bundle
bundle exec appraisal rake