GCP compute instance auto shutdown when vscode remote edit currently doesn't run/connected

gcp-auto-shutdown.sh

#!/bin/bash

# Requred packages to install:
# sudo, lsof, gcloud,

# CONFIG VARS===================
LAST_RUN_CHECK_FILE_NAME="./last-run-check" #Place to store date time when last port check performed
SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
RUNNING_PROCESS_NAME=code-fabd
MAX_LAST_RUN_MINUTES=20
GCP_COMPUTE_INSTANCE_NAME="ml-workspace"
GCP_COMPUTE_ZONE=asia-southeast2-c

cd $SCRIPT_DIR;

if [ "$1" = "clear"  ]; then
    echo "Clearing config..."
    cp $LAST_RUN_CHECK_FILE_NAME "${LAST_RUN_CHECK_FILE_NAME}.old"
    rm $LAST_RUN_CHECK_FILE_NAME
    echo "$(date): $LAST_RUN_CHECK_FILE_NAME has cleared" > "clear.log"
    exit 0
fi

update_last_run_time() {
    echo $(date +%s) > $LAST_RUN_CHECK_FILE_NAME
}

get_last_run_time() {
    RET=$(cat ${LAST_RUN_CHECK_FILE_NAME})
    if [ -z "${RET}" ]; then update_last_run_time; RET=$(date +%s); fi
    echo $RET
}

get_last_run_diff() {
    LAST_RUN_TIME=$(get_last_run_time)
    CUR_TIME=$(date +%s)

    RET=$(($CUR_TIME-$LAST_RUN_TIME))
    echo $RET
}

PROCESS_RUNNING_COUNT_SCRIPT="sudo lsof -i -P -n | grep ESTABLISHED | grep $RUNNING_PROCESS_NAME | wc -l"
echo "PROCESS_RUNNING_COUNT_SCRIPT = ${PROCESS_RUNNING_COUNT_SCRIPT}"
PROCESS_RUNNING_COUNT="$(sudo lsof -i -P -n | grep ESTABLISHED | grep $RUNNING_PROCESS_NAME | wc -l)"
echo "PROCESS_RUNNING_COUNT = ${PROCESS_RUNNING_COUNT}"

if [ $PROCESS_RUNNING_COUNT -ge 1 ]; then update_last_run_time; fi

LAST_RUN_SECONDS=$(get_last_run_diff)
LAST_RUN_MINUTES=$(($LAST_RUN_SECONDS/60))
echo "$(date): Last run in minutes: $LAST_RUN_MINUTES"

if [ $LAST_RUN_MINUTES -ge $MAX_LAST_RUN_MINUTES ]; then
    echo "Shuttingdown instance==============="
    rm $LAST_RUN_CHECK_FILE_NAME
    cp run.log run.log.last
    gcloud compute instances stop ${GCP_COMPUTE_INSTANCE_NAME} --zone ${GCP_COMPUTE_ZONE}
    echo "stopped*********"
fi

# crontab
#=================
# * * * * * /home/user/gcp/vm.sh > /home/user/gcp/run.log


# File name = gcp-auto-stop.shutdown.service
# command sudo systemctl enable gcp-auto-stop.shutdown
# ===========================================
# [Unit]
# Description=Clear GCP auto stop file state on shutdown

# [Service]
# Type=oneshot
# RemainAfterExit=true
# ExecStart=/home/user/gcp/vm.sh clear
# ExecStop=/home/user/gcp/vm.sh clear

# [Install]
# WantedBy=multi-user.target