The bash script I'm trying to run on the K8S cluster node from a proxy server is as below:

#!/usr/bin/bash
cd /home/ec2-user/PVs/clear-nginx-deployment
for file in $(ls)
do
    kubectl -n migration cp $file clear-nginx-deployment-d6f5bc55c-sc92s:/var/www/html
done

This script is not copying data which is therein path /home/ec2-user/PVs/clear-nginx-deployment of the master node.

But it works fine when I try the same script manually on the destination cluster.

I am using python's paramiko.SSHClient() for executing the script remotely:

def ssh_connect(ip, user, password, command, port):
    try:
        client = paramiko.SSHClient()

        client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
        client.connect(ip, username=user, password=password, port=port)

        stdin, stdout, stderr = client.exec_command(command)

        lines = stdout.readlines()

        for line in lines:
            print(line)

    except Exception as error:
        filename = os.path.basename(__file__)
        error_handler.print_exception_message(error, filename)

    return

To make sure the above function is working fine, I tried another script:

#!/usr/bin/bash
cd /home/ec2-user/PVs/clear-nginx-deployment
mkdir kk

This one runs fine with the same python function, and creates the directory 'kk' in desired path. If you could please suggest the reason behind, or suggest an alternative to carry out this. Thank you in advance.