I have generated a python script that opens a deployment config_file.yaml, modifies some parameters and saves it again, using pyyaml. This python script will be executed in the master node of a Kubernetes cluster.
Once is generated the new file, my intention is to execute
kubectl apply -f config_file.yamlin the python script to apply the modifications to the deployment.
I have been reading how to do it using kubernetes python client, but it seems it is not prepare to execute kubectl apply.
So the other option is to create a bash script and execute it from python script.
Bash scripts:
#!/bin/bash
sudo kubectl apply -f config_file.yaml
I give it permissions chmod +x shell_scipt.sh
Python script:
import subprocess
subprocess.call(['./shell_script.sh'])But an error appears: File "/usr/lib/python2.7/subprocess.py", line 1047, in _execute_child raise child_exception OSError: [Errno 13] Permission denied
I don't know how to resolve this error, I have tested givin permissions to the bash script, but nothing worked.
I do not know anything about Kubernetes but I think I might help.
I am basically suggesting that you run the command directly from Python script, not having Python running a bash script which runs a command.
import os
command = 'kubectl apply -f config_file.yaml'
password = 'yourpassword'
p = os.system('echo %s|sudo -S %s' % (passs, command))If I understand correctly you are using python to dynamically modify static yaml files. If this is the case I would recommend using helm which if perfect for making static yaml file dynamic :-)