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.

Put this line in your Gemfile:

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

There are four steps to setup DeadMan:

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

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)

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

DeadMan::Heartbeat.pulse('UniqueJobName')

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}" }

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

DeadMan.redis = REDIS

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

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:

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