kubernetes_deployment-rollout_diff-pods.py

#!/usr/bin/python2

import subprocess
from time import sleep

APP_NAME="app-python"
APP_VERSION="v1"

# Get current pods
COMMAND="kubectl get pods | grep %s | awk '{print $1}'" % (APP_NAME)
pods_old = subprocess.check_output(COMMAND, shell=True)[:-1].split("\n")
print(pods_old)

# Apply changes
COMMAND="kubectl apply -f %s.yaml" % APP_VERSION
kube_apply=subprocess.check_output(COMMAND, shell=True)
print(kube_apply)

sleep(5)

COMMAND="kubectl get pods | grep %s | awk '{print $1}'" % (APP_NAME)
pods = subprocess.check_output(COMMAND, shell=True)[:-1].split("\n")
print(pods)

pods_new = [item for item in pods if item not in pods_old]
print(pods_new)