Re: Simple Web interface for StarCluster

From: Sergio Mafra <no email>
Date: Fri, 25 Apr 2014 11:17:13 -0300

Hi Hugh,

Thanks for your answer,
What is happening is that if you issue commands like "ls -la", it works
perfectly.
If you issue a StarCluster command like "starcluster listclusters"... it
works.
but if you try to use"Starcluster start -c cluster_template
cluster_name"... it doesn´t show any output and $output returns empty.
If you try to do another example, this is what is going to happen.

1. Try $ starcluster listclusters > output.txt (the file will have all
output)
2. if you try $ starcluster start -c cluster_template cluster_name >
output.txt (the file will be 0 bytes)

All best,

Sergio




On Fri, Apr 25, 2014 at 9:40 AM, MacMullan, Hugh
<hughmac_at_wharton.upenn.edu>wrote:

> Hi Sergio:
>
>
>
> If it’s not running ‘like expected’, how is it running? What version of
> PHP are you using? Does this script work for you:
>
>
>
> <?php
>
> $shellCommand = 'ls -lart';
>
> $output = shell_exec($shellCommand);
>
> echo "<pre>$output</pre>";
>
> ?>
>
>
>
> For that function to work (in 5.3.X or earlier), you *must* turn off
> ‘safe_mode’ in your php.ini file. See manual
> http://www.php.net/manual/en/function.shell-exec.php, and
> http://www.php.net/manual/en/ini.sect.safe-mode.php#ini.safe-mode for
> details on safe modes.
>
>
>
> Beyond that, you need to make sure apache user (or whatever you’re running
> as) has access to everything it needs. Be secure.
>
>
>
> -Hugh
>
>
>
>
>
> *From:* starcluster-bounces_at_mit.edu [mailto:starcluster-bounces_at_mit.edu] *On
> Behalf Of *Sergio Mafra
> *Sent:* Friday, April 25, 2014 7:31 AM
> *To:* starcluster_at_mit.edu
> *Subject:* [StarCluster] Simple Web interface for StarCluster
>
>
>
> Hi fellows,
>
>
>
> We use StarCluster for managing our clusters for running eletrical
> engineering purporses. The engineers want to deploy the clusters in AWS by
> themselves and we think that letting them access the StarCluster line
> interface and modifying the config file for expandig/reducing the number of
> nodes in a cluster could be dangerous and not so intuitive.
>
> So, we decided to build a very simple web interface using Apache and PHP
> aiming to read the config file, expose the clusters and letting them
> increase or decrease the number of nodes among limits and starting or
> terminating the cluster with the new parameters.
>
> We are not expert in PHP and could be not the best tool, but it´s proven
> to be a quick development. We will study other options like Python and
> Django in the near future.
>
> The question is: how to execute a command like "starcluster start -c
> cluster_template cluster_name in PHP? We are trying to use a command like
> $output = shell_exec($shellCommand);where $shellCommand is "starcluster
> start -c ..." but it doesn´t run like expected. Any ideas?
>
>
>
>
>
> All best,
>
>
> Sergio
>
>
>
Received on Fri Apr 25 2014 - 10:17:15 EDT