I installed the ice library for python on my Centos 7 server and I would like to develop a script for dynamically creating murmur channel with a given name.
Is there some documentation for Ice somewhere, or a ready made script to do what I need?
I used Ice to create a script for adding and removing channels.
Related
I want my C++ application to launch an arbitrary app (let's say a python script through a python interpreter) inside a secure enclave (Intel SGX). Is that even possible?
The steps are the following.
My app initializes an enclave and performs its attestation.
Next, it somehow uploads a python interpreter and a python script to the enclave.
It also uplaods to the enclave some piece of data to be processed by the script.
Then, the script is being launched inside the enclave and the data is being processed.
Finally, the processing result is uploaded back to the host.
Is this scenario possible? If yes, are there any examples on how to do so?
Microsoft OpenEnclave is also a choice.
There are many examples of adding unmodified libraries to SGX and then run the toy applications: oeapkman, Package Manager and Toolbox for enclave development: apkman.
If AWS Nitro Enclaves would satisfy you then the Oblivious framework let’s you do what you are describing.
There is a full tutorial and YouTube walkthrough of deploying FastAPI servers, as an example, here.
Disclosure: I work with Oblivious but this post is in no way an ad or plug, I think it just does what #pgr is asking for.
Suggest a solution if such exists.
There are 20 empty baremetal servers. Me need to go to the ipmi and manually connect the image file to start the installation OS.
Question: are there any solutions to automate this process?
Since you tag this question with "OpenStack", you must have heard of Ironic.
If the thought of installing OpenStack to automatically install servers frightens you, look up Cobbler. It was used by now defunct products Helion OpenStack and SUSE OpenStack Cloud to set up clouds.
Ubuntu uses MAAS for this purpose.
This is not a complete list.
I am testing P2P apps. I have downloaded OFF (Owner free Filesystem) P2P from the below link:
http://sourceforge.net/projects/offsystem/files/OFF%20System/
But I am unable to download any files using this client. I am not getting error messages even. I have referred following link also.
REF:
http://www.ghacks.net/2009/04/10/p2p-the-owner-free-file-system/
Please suggest some ideas if any of you used this OFF system.
From what I recall, the program ships with a list of bootstrap nodes. Chances are as active development ceased (at least as far as I am aware) many years ago that none of the bootstrap nodes are online.
I doubt that you will be able to get the network to function as there are unlikely to be any other nodes still running.
If you were to set-up a cluster of VM's running the software, it should be possible to set a bootstrap node in the config somewhere, once it has a connection, it will retrieve a list of other nodes that it can connect to.
In my university there's a certain wlan network open for the students and employees. To use it, however, one must first log in via a website using your own username and password. This can also be done by submitting a http request with the right POST-data to the same website. I already have a shell script that does this but I'm still curious to whether it would be possible to have this script run automagically every time my computer connects to the university wlan. Is it possible to do this in some semi-easy way?
I know that NetworkManager (which is used in Ubuntu) exposes a DBUS interface -- I would suspect there is an event for network connected / disconnected which you could use. Try checking the NetworkManager DBUS Interface spec.
If you've never worked with DBUS before, fear not, there are bindings for pretty much every language. I'm sure there's even a CLI client you could invoke from a shell script. This blog entry shows how to detect a new connection from NetworkManager with Python -- it might be a good starting point
You might write a simple script that runs "iwconfig" and processes it's output. If the name of the network is found (with Regex for example) you send a request.
I don't think you can trigger the script when you are acutally connected to the network, but you can add it to CRON, so it is executed for example every ten seconds.
Heres's a document you may find helpful: https://help.ubuntu.com/community/CronHowto
We have a set of Mac machines (mostly PPC) that are used for running Java applications for experiments. The applications consist of folders with a bunch of jar files, some documentation, and some shell scripts.
I'd like to be able to push out new version of our experiments to a directory on one Linux server, and then instruct the Macs to update their versions, or retrieve an entire new experiment if they don't yet have it.
../deployment/
../deployment/experiment1/
../deployment/experiment2/
and so on
I'd like to come up with a way to automate the update process. The Macs are not always on, and they have their IP addresses assigned by DHCP, so the server (which has a domain name) can't contact them directly. I imagine that I would need some sort of daemon running full-time on the Macs, pinging the server every minute or so, to find out whether some "experiments have been updated" announcement has been set.
Can anyone think of an efficient way to manage this? Solutions can involve either existing Mac applications, or shell scripts that I can write.
You might have some success with a simple Subversion setup; if you have the dev tools on your farm of Macs, then they'll already have Subversion installed.
Your script is as simple as running svn up on the deployment directory as often as you want and checking your changes in to the Subversion server from your machine. You can do this without any special setup on the server.
If you don't care about history and a version control system seems too "heavy", the traditional Unix tool for this is called rsync, and there's lots of information on its website.
Perhaps you're looking for a solution that doesn't involve any polling; in that case, maybe you could have a process that runs on each Mac and registers a local network Bonjour service; DNS-SD libraries are probably available for your language of choice, and it's a pretty simple matter to get a list of active machines in this case. I wrote this script in Ruby to find local machines running SSH:
#!/usr/bin/env ruby
require 'rubygems'
require 'dnssd'
handle = DNSSD.browse('_ssh._tcp') do |reply|
puts "#{reply.name}.#{reply.domain}"
end
sleep 1
handle.stop
You can use AppleScript remotely if you turn on Remote Events on the client machines. As an example, you can control programs like iTunes remotely.
I'd suggest that you put an update script on your remote machines (AppleScript or otherwise) and then use remote AppleScript to trigger running your update script as needed.
If you update often then Jim Puls idea is a great one. If you'd rather have direct control over when the machines start looking for an update then remote AppleScript is the simplest solution I can think of.