Project

dead-man

0.0
No commit activity in last 3 years
No release in over 3 years
DeadMan is an implementation of a dead man's switch to monitor jobs. It's a simple tool that gives visibility when jobs fail to run.
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
 Dependencies

Development

>= 0

Runtime

 Project Readme

DeadMan

DeadMan is an implementation of a dead man's switch to monitor jobs. It's a simple tool that gives visibility when jobs fail to run.

After a job runs, a heartbeat is sent to DeadMan. If a job is registered to run at a certain interval but doesn't get a heartbeat, it's notification callback will be invoked.

Install

Put this line in your Gemfile:

gem 'dead-man', require: 'dead_man'

Usage

There are four steps to setup DeadMan:

  • Registering switches
  • Sending heartbeats
  • Registering notification callbacks
  • Connect Redis

Registering Switches

To register a job as a switch in DeadMan, simply supply the unique name of the job along with the frequency at which the job should run:

DeadMan::Switch.register_switch('UniqueJobName', 2.hours)

Sending Heartbeats

In your application, send a unique heartbeat to DeadMan after a job completes:

DeadMan::Heartbeat.pulse('UniqueJobName')

Registering Notification Callbacks

Now that DeadMan is tracking jobs, the final step is connecting your notification system. Pass a block to register a callback for failure notifications. For example, ping Slack every time a job fails to run:

DeadMan::Switch.register_callback -> (message) { SLACK.ping("Failed job: #{message}" }

Connect Redis

Redis is used to track DeadMan heartbeats. Connect your Redis instance to DeadMan in your application:

DeadMan.redis = REDIS

Questions & Feedback

Feel free to message me on Github (seanmcoleman) or on twitter (seancoleman86)

License

Copyright © 2014 Sean Coleman

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.