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Watch and tail files with specified time based patterns and push them to kafka
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 Dependencies

Development

>= 0

Runtime

 Project Readme

Tailf2Kafka

Watch and tail files in dirs with specified filename time based patterns and push them to kafka.

Installation

Install libsnappy dev libs if you want to take advantage of compression

apt-get install libsnappy-dev

Add this line to your application's Gemfile:

gem 'tailf2kafka'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install tailf2kafka

Usage

$ tailf2kafka -h
Usage: tailf2kafka [options]
        --config PATH                Path to settings config
    -h, --help                       Display this screen
$

Config

tailf:
  files:
    - topic: haproxy
      prefix: /var/log/haproxy/haproxy
      suffix: ''
      time_pattern: ".%Y-%m-%d.%H"
  position_file: "/var/lib/haproxy/tail2kafka.offsets"
  flush_interval: 1
  max_batch_lines: 1024
  from_begining: true
  delete_old_tailed_files: true
kafka:
  brokers: ["broker1:9092", "broker2:9092", "broker3:9092"]
  producer_type: sync
  produce: true
  • kafka.brokers - Array of kafka brokers to connect to
  • kafka.producer_type - type of producer sync or async
  • kafka.produce - if false will not conect to kafka and will not produce any messages to it
  • tailf.position_file - file where to save tailed files offsets which were pushed to kafka
  • tailf.flush_interval - how often in seconds to save the offsets to a file
  • tailf.max_batch_lines - max number of lines to batch in each send request
  • tailf.from_beggining - in case of a new file added to tailing , if to start tailing from beggining or end of the file
  • tailf.delete_old_tailed_files - if to delete files once their time_pattern does not match the current time window and if they have been fully produced to kafka
  • tailf.files - array of file configs for tail, each tailed file configs consists of:
    • topic - which kafka topic to produce the messages to
    • prefix - the files prefix to watch for
    • time_pattern - ruby time pattern of files to tail
    • suffix - optional suffix of files to watch for so the tool will watch for files that match - prefix + time_pattern + suffix

Features/Facts

  • The config is validated by schash gem
  • Tailed files are watched for changes by rb-notify gem
  • Dirnames of all files prefixes are watched for new files creation or files moved to the dir and are automaticaly added to tailing.
  • As well dirnames are watched for deletion or files being moved out of directory, and they are removed from the list of files watched for changing.
  • Based time_pattern, files are periodicaly autodeleted , thus avoiding need for log rotation tools.
  • Files are matched by converting time_pattern to a regexp

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
  6. Go to 1