Writing scripts

The agent will parse the last line of the scripts looking for a string which represents a state or a json result object.

A state could be any state or event linked to the task or monitor of this script. Default build-in events are success and failure.

So if your scripts ended ok, in bash you have to echo "ok" as the last output of your script.

success, normal and ok are valid success states.

failure and fail are valid failure states.

Some code

This is a simple check with success and failure

# Some comands and checks here
# ...
# And at the end of the script...
if [ $check == true ]; then
echo "success"
exit
else
echo "failure"
exit
fi
# or you can keep doing more things, you can control the flow of your script and end it when anytime
echo "success"

If you need to report extra information to the api, you have to send the information to stdout in json format like this

varUno="value1"
varTwo="value2"
# This will output valid JSON and will be parsed by the agent
# Write JSON by hand is ugly, we will improve this in the feature
if [ true ]; then
echo { \"state\":\"success\", \"data\":{ \"val1\":$varTwo, \"val2\":$varUno } }
else
echo { \"state\":\"failure\", \"data\":{ \"val1\":$varTwo, \"val2\":$varUno } }
fi

The JSON output needs to include a state property with the final state of your script, and a data property with any extra information you want to send to the api.

If you need to validate the JSON output of your scripts, you can use this simple nodejs script - there are also nice web sites that can validate JSON for you too. Change it for your case

test_json.js

// test.js
var exec = require('child_process').exec;
exec('./test.sh', function(err, stdout, stderr){
var obj = JSON.parse(stdout);
// if the stdout string was parsed successfuly the next sentence will give the members number - which is 1
console.log( obj.data );
});

the test.sh script looks like this

#!/bin/bash
state='normal'
POOL='pool'
members=1
# this is valid json when send to stdout
echo { \"state\" : \"$state\" , \"data\" : { \"members\" : $members } }
# this will echo { "state": "normal" , "data" : { "members": 1 } }

There are a lot of sample scripts, written in different languages wich are in production today.

Check our TheEye-io gist scripts page.

Some samples

Powershell NodeJS Bash Batch