Node ninja runner is a bash script to run Node.js servers. It will automagically restart crashed servers, and will monitor memory usage for you. To prevent out-of-control servers, you can:

• Control the number of restarts it does in a certain period of time before it gives up.
• Monitor the amount of memory used by the process and kill it if it exceeds a specified amount.

To use:

bash node_ninja_runner.sh max_mem max_restarts time_period script_name [other args]

For example:

bash node_ninja_runner.sh 100 10 2 personal_blog.js production

This will run personal_blog.js passing in the argument production, with a memory limit of 100M, and will permit no more than 10 crashes within a 2 minute period.

Parameters:

1. max_mem -- The maximum amount of memory the node process should be allowed to consume. If it exceeds this, it will be terminated and restarted.
2. max_restarts -- This combines with the next param, time_period, to determine if the app is "runaway" or not. Normally, when node exits because of an uncaught error, node_ninja_runner starts it. If it exceeds max_restarts in time_period minutes, however, then the app is considered runaway and will no longer be restarted.
3. time_period -- See previous.
4. script_name -- The name of the node script to run.
5. You can provide optional arguments to the script to run. These are currently limited to 10 in count.