Contents of r2.py

This script uses the multiprocessing and os modules to automate the deployment of files and scripts to a list of remote servers, and execute them on each server in parallel.

Here is a step-by-step explanation of the script:

• The run_script() function takes in three parameters: ip, username, and password. This function is responsible for deploying the required files and scripts to the remote server, and executing the script.sh and nfs.sh scripts on the server. It uses the os module to run the necessary scp and ssh commands to transfer the files and execute the scripts on the remote server.
• The ips list contains the IP addresses of all the remote servers that the script will be executed on.
• The username and password variables are used for SSH authentication.
• The ThreadPool() function from the multiprocessing.pool module is used to create a thread pool with a number of worker processes equal to the number of servers in the ips list.
• The pool.starmap() function is called with the run_script() function and a list of tuples containing the ip, username, and password for each server. This function maps the run_script() function to each element of the list of tuples, and executes them in parallel on each server.
• Once all the scripts have been executed on all the remote servers, the script prints the message "Script executed on all IP addresses."

The requirements.txt file is a list of Python packages that are required for the running the model. script.sh is used for setting up the enviromnet and nfs.sh is used for setting up the nfs server on an ip.