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https://github.com/kevinveenbirkenbach/computer-playbook.git
synced 2024-11-09 22:41:03 +01:00
Implemented exception handling for defrost service and refactored code
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@ -4,6 +4,14 @@ import time
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import os
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from datetime import datetime
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# Global variable definition
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BREAK_TIME_SECONDS = 5
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FREEZER_SERVICES_PREFIX="system-maintenance-service-"
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class AttemptException(Exception):
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"""A custom exception for maximum number of attempts."""
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pass
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def parse_time_to_seconds(time_str):
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"""
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Convert a time string (e.g., '1h', '30min', '45s') to seconds.
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@ -51,7 +59,7 @@ def stop_timer(service):
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"""
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Stop and disable a systemd timer for a service if it exists.
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"""
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if service == "system-maintenance-service-defrost":
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if service == f"{FREEZER_SERVICES_PREFIX}defrost":
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print(f"Ignoring {service}. It's the initializer of freezer.")
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if service_file_exists(service, "timer"):
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timer_name = f"{service}.timer"
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@ -74,7 +82,7 @@ def stop_all_timers(services):
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for service in services:
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stop_timer(service)
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def wait_for_all_services_to_stop(filtered_services, max_attempts, attempt, break_time_sec):
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def wait_for_all_services_to_stop(filtered_services, max_attempts, attempt):
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"""
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Wait until all services in the list have stopped, with a maximum number of attempts.
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"""
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@ -82,40 +90,51 @@ def wait_for_all_services_to_stop(filtered_services, max_attempts, attempt, brea
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while check_service_active(service):
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attempt += 1
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if attempt > max_attempts:
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raise Exception(f"Maximum attempts ({max_attempts}) reached. Exiting.")
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print(f"{datetime.now().isoformat()}#{attempt}/{max_attempts}: Waiting for {break_time_sec} seconds for {service} to stop...")
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time.sleep(break_time_sec)
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raise AttemptException(f"Maximum attempts ({max_attempts}) reached. Exiting.")
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print(f"{datetime.now().isoformat()}#{attempt}/{max_attempts}: Waiting for {BREAK_TIME_SECONDS} seconds for {service} to stop...")
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time.sleep(BREAK_TIME_SECONDS)
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return attempt
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def freeze(filtered_services, timeout_sec):
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"""
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Freeze services by stopping them and their timers, waiting up to a timeout.
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"""
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break_time_sec = 5
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attempt = 0
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max_attempts = timeout_sec / break_time_sec
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max_attempts = get_max_attempts(timeout_sec)
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while check_any_service_active(filtered_services):
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stop_all_timers(filtered_services)
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attempt = wait_for_all_services_to_stop(filtered_services, max_attempts, attempt, break_time_sec)
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attempt = wait_for_all_services_to_stop(filtered_services, max_attempts, attempt)
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print("All required services have stopped.")
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def start_timer(service):
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timer_name = f"{service}.timer"
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subprocess.run(['systemctl', 'start', timer_name])
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subprocess.run(['systemctl', 'enable', timer_name])
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print(f"{timer_name} started and enabled.")
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def get_max_attempts(timeout_sec):
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return timeout_sec // BREAK_TIME_SECONDS
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def defrost(filtered_services,timeout_sec):
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"""
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Defrost services by starting and enabling their timers.
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"""
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break_time_sec = 5
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running_service = f"{FREEZER_SERVICES_PREFIX}{action}"
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attempt = 0
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max_attempts = timeout_sec / break_time_sec
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wait_for_all_services_to_stop(filtered_services, max_attempts, attempt, break_time_sec)
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max_attempts = get_max_attempts(timeout_sec)
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try:
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wait_for_all_services_to_stop(filtered_services, max_attempts, attempt)
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except AttemptException as e:
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print(e)
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print("Defrosting was not possible. The execution of other services took to long.")
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start_timer(running_service)
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exit(0)
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for service in filtered_services + [f"system-maintenance-service-{action}"]:
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for service in filtered_services + [running_service]:
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print(f"Unfreezing: {service}")
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if service_file_exists(service, "timer"):
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timer_name = f"{service}.timer"
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subprocess.run(['systemctl', 'start', timer_name])
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subprocess.run(['systemctl', 'enable', timer_name])
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print(f"{timer_name} started and enabled.")
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start_timer(service)
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else:
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print("No timer to activate for service.")
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print("All required services are started.")
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@ -126,7 +145,7 @@ def main(services, ignored_services, action, timeout_sec):
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"""
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# Ignoring the current running service
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running_service=f"system-maintenance-service-{action}"
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running_service=f"{FREEZER_SERVICES_PREFIX}{action}"
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if running_service not in ignored_services:
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ignored_services.append(running_service)
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