load configuration.json securely

[defunct]

load configuration.json securely

[bigeasy]

I'm sorry. I'm not sure I understand the problem. Please help me understand.

This is what I read: When you get a response other than 200, you want to launch a new instance at Amazon.

I don't understand the requirement that your local machine is not connected. If you are running this script from your local machine, won't it have to be connected to both request www.domain.tld and connect to EC2?

[nkhine]

hi, i wanted to be able to create a 'chain' of t1.micro instances where the 'chain' is initialised from my local machine and any subsequent instances are initialised depending on the response of www.domain.tld from the EC2 instance rather then the local machine.

perhaps an easier way is to just use something like nodester to do the monitoring and the launching and shutting down of the EC2 instances, rather then using it from my local machine.

hope this makes sense.

thanks for any advise.

[bigeasy]

You are going to need to run node-ec2 on the instance you launch. Do you have a plan for that?

[nkhine]

yes, i have an EC2 image which has node-ec2 running, where i manually add the configuration.json file.

are there any secure ways to pass the configuration.json data from one instance to the next? or am i missing something?

[bigeasy]

You could pass the configuration.json in as EC2 user data. You would have to create an image that has a program that runs at startup that launches your monitoring process.

Alternatively, you can use ssh or scp once the program loads to copy the configuration.json into place and start the process remotely.

Either way, a simple bash program would be a good choice for the glue.

The scp way, you'd launch your other machine using a special_key key pair. Then you can poll DescribeInstances to get an idea of when the instance is ready and get its local network IP address. Then you can copy over your configuration securely with a script like this.

#!/bin/bash

INTERNAL_IP=$1

scp -i /var/aws/lib/special_key -o StrictHostKeyChecking=no ./configuration.json $INTERNAL_IP@/var/aws/run/configuation.json

I use ssh as my secure machine to machine protocol and glue my Node.js programs together with bash.

[nkhine]

ok thanks for your time and advise