Post to slack if your host requires reboot

check-for-reboot.sh

#!/usr/bin/env bash

set -o errexit
set -o nounset
set -o pipefail
if [[ "${TRACE-0}" == "1" ]]; then
    set -o xtrace
fi

# Function to send a message to Slack
send_slack_notification() {
    message="Reboot is required on $(hostname)"
    slack_webhook_url="YOUR_SLACK_WEBHOOK"
    curl -X POST -H 'Content-type: application/json' --data "{\"text\":\"$message\"}" "$slack_webhook_url"
}

# Check if a reboot is required
if [ -e /var/run/reboot-required ]; then
    send_slack_notification
fi