How to monitor Python scripts using Sensu?

Question

I would like to use Sensu Core to monitor python scripts and I am confused how to do it.

From Sensu documentation this requires Sensu Checks. In the provided example ruby script checks that chef-client is running:

#!/usr/bin/env ruby

# get the current list of processes
processes = `ps aux`

# determine if the chef-client process is running
running = processes.lines.detect do |process|
  process.include?('chef-client')
end

# return appropriate check output and exit status code
if running
  puts 'OK - Chef client process is running'
  exit 0
else
  puts 'WARNING - Chef client process is NOT running'
  exit 1
end

How to implement such a check for a specific script and not the application? That is, how would I go about monitoring a specific python script (e.g. test.py) and not python in general?

Answer 1

So, I have been running some python scripts in sensu for my AWS Linux clients successfully , this is a good example of my check definition:

{
 "checks": {
"check-rds-limit": {
  "interval": 86400, 
  "command": "/etc/sensu/plugins/rds-limit-check.py",
  "contacts": [
    "cloud-ops"
  ],
  "occurrences": 1,   
  "subscribers": [
    "cloud-ops-subscription"
  ], 
  "handlers": [
    "email",
    "slack"
  ]
}
  }
}

And your python plugin can start with defining the shebang path:

#!/usr/bin/env python
import sys
...
...
//<code condition for warning>
sys.exit(1)
//<code condition for critical>
sys.exit(2)
//<code condition where everything is fine>
sys.exit(0)