List All CronJob in an List of Instances defined in `instances.cfg` with gcloud compute network tags

check-cronjob.sh

#!/bin/bash
instance_list="instances.cfg"
date=$(date +'%FT%TZ')

mkdir -pv $(pwd)/cronjob-logs
mkdir -pv $(pwd)/cronjob-logs/$date

while read instance_name <&3
do
    echo "----------------------------------------------" 2>&1 | tee -a $(pwd)/cronjob-logs/$date/$instance_name-cronjob.log
    echo "CronJob List for Instance : $instance_name" 2>&1 | tee -a $(pwd)/cronjob-logs/$date/$instance_name-cronjob.log
    ssh $instance_name 'for user in $(sudo cut -f1 -d: /etc/passwd); do echo "CronJob for User : $user" && sudo crontab -u $user -l; done' 2>&1 | tee -a $(pwd)/cronjob-logs/$date/$instance_name-cronjob.log
    echo "----------------------------------------------" 2>&1 | tee -a $(pwd)/cronjob-logs/$date/$instance_name-cronjob.log
    echo "List of Network Tags of Instance : $instance_name" 2>&1 | tee -a $(pwd)/cronjob-logs/$date/$instance_name-cronjob.log
    gcloud compute instances describe $instance_name --format='get(tags.items)' | tr ';' '\n' | grep -v '^$' 2>&1 | tee -a $(pwd)/cronjob-logs/$date/$instance_name-cronjob.log
    echo "----------------------------------------------" 2>&1 | tee -a $(pwd)/cronjob-logs/$date/$instance_name-cronjob.log
done 3< <(grep -v '^#' ${instance_list})

echo "CronJob List are available at $(pwd)/cronjob-logs/$date"