Server Power Cycle Script

Overview

The server-power-cycle.sh script automates the process of cycling a server through disable/enable states with reboots for a 24-hour period. This is particularly useful for testing server resilience and state transitions.

Features

• Cycles server every 2 minutes for 24 hours
• Disables server, waits 2 minutes, reboots
• Enables server 1 second after reboot
• Maintains cycle through system reboots
• Automatically stops after 24 hours

Prerequisites

• Root access to the server
• lbcli command line tool installed
• SystemD-based Linux system

Installation and Usage

1. Save script as /root/server-power-cycle.sh
2. Make script executable:

chmod +x /root/server-power-cycle.sh

3. Run the script:

 ./root/server-power-cycle.sh

Cycle Process

1. Initial setup:

   • Creates necessary directories and service files
   • Enables the server if currently disabled
   • Waits 30 seconds for stable state

2. Main cycle:

   • Disables server using lbcli disable server --name server00
   • Waits 2 minutes
   • Reboots system
   • Waits 1 second after reboot
   • Enables server using lbcli enable server --name server00
   • Repeats

Monitoring

• Check service status:

systemctl status server-cycle

• View system journal:

journalctl -u server-cycle
journalctl -u server-cycle-enable

Stopping the Cycle

To stop the cycle before 24 hours:

systemctl stop server-cycle
systemctl disable server-cycle
systemctl disable server-cycle-enable

Files Created

• Main script: /root/server_cycle/cycle.sh
• Enable script: /root/server_cycle/enable.sh
• SystemD services:
  • /etc/systemd/system/server-cycle.service
  • /etc/systemd/system/server-cycle-enable.service
• Timestamp file: /root/server_cycle/start_time.txt