kevinveenbirkenbach/computer-playbook
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Kevin Veen-Birkenbach 2023-12-14 18:19:44 +01:00
parent 0cd0031368
commit b2a0428426
1 changed files with 66 additions and 57 deletions
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123
roles/system-maintenance-service-freezer/files/system-maintenance-service-freezer.py
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@ -5,7 +5,9 @@ import os
from datetime import datetime
def parse_time_to_seconds(time_str):
"""Convert time string to seconds."""
"""
Convert a time string (e.g., '1h', '30min', '45s') to seconds.
"""
units = {"s": 1, "min": 60, "h": 3600}
if time_str[-3:] in units:
number, unit = time_str[:-3], time_str[-3:]
@ -18,116 +20,123 @@ def parse_time_to_seconds(time_str):
return int(number) * units[unit]
def service_file_exists(service_name, service_type="service"):
"""Check if a systemd service file exists."""
# Paths where service files can be stored
"""
Check if a systemd service file of a given type exists for a service.
"""
path = "/etc/systemd/system/"
service_file_name = service_name + "." + service_type
service_file_name = f"{service_name}.{service_type}"
full_path = os.path.join(path, service_file_name)
print(f"Checking {full_path}") # Added debug output
if os.path.isfile(full_path):
return True
else:
print(f"File not found.") # Debug output if file is not found
# Debug output for checking the service file existence
print(f"Checking {full_path}")
return os.path.isfile(full_path)
def check_service_active(service_name):
"""Check if a service is active or activating."""
"""
Check if a systemd service is currently active or activating.
"""
result = subprocess.run(['systemctl', 'is-active', service_name], stdout=subprocess.PIPE)
service_status = result.stdout.decode('utf-8').strip()
return_value=service_status in ['active', 'activating']
if return_value:
print(f"Service {service_name} is active.");
else:
print(f"Service {service_name} is not active.");
return return_value
is_active = service_status in ['active', 'activating']
print(f"Service {service_name} is {'active' if is_active else 'not active'}.")
return is_active
def check_any_service_active(services):
"""Check if any service in the list is active or activating."""
for service_name in services:
if check_service_active(service_name):
return True
return False
"""
Check if any service in a given list is active or activating.
"""
return any(check_service_active(service) for service in services)
def stop_timer(service):
# Stop and disable the corresponding timer, if it exists
if service_file_exists(service,"timer"):
timer_name = service + ".timer"
"""
Stop and disable a systemd timer for a service if it exists.
"""
if service_file_exists(service, "timer"):
timer_name = f"{service}.timer"
subprocess.run(['systemctl', 'stop', timer_name])
subprocess.run(['systemctl', 'disable', timer_name])
print(f"{timer_name} stopped and disabled.")
else:
print(f"No timer to stop.")
print("No timer to stop for service.")
def filter_services(services, ignored_services):
"""
Removes all services from the 'services' list that are contained in 'ignored_services'.
:param services: List of services.
:param ignored_services: List of services to be ignored.
:return: Filtered list of services.
Filter out services that are in the ignored_services list from services list.
"""
return [service for service in services if service not in ignored_services]
def stop_all_timers(services):
"""
Stop and disable timers for all services in a given list.
"""
for service in services:
stop_timer(service)
def wait_for_all_services_to_stop(filtered_services,max_attempts,attempt,break_time_sec):
def wait_for_all_services_to_stop(filtered_services, max_attempts, attempt, break_time_sec):
"""
Wait until all services in the list have stopped, with a maximum number of attempts.
"""
for service in filtered_services:
while check_service_active(service):
attempt += 1
if attempt > max_attempts:
raise Exception(f"Error: Maximum attempts ({max_attempts}) reached. Exit.")
raise Exception(f"Maximum attempts ({max_attempts}) reached. Exiting.")
print(f"{datetime.now().isoformat()}#{attempt}/{max_attempts}: Waiting for {break_time_sec} seconds for {service} to stop...")
time.sleep(break_time_sec)
return attempt
def freeze(filtered_services,timeout_sec):
break_time_sec=5
attempt=0
max_attempts=timeout_sec/break_time_sec
def freeze(filtered_services, timeout_sec):
"""
Freeze services by stopping them and their timers, waiting up to a timeout.
"""
break_time_sec = 5
attempt = 0
max_attempts = timeout_sec / break_time_sec
# This guaranties that no service will be started in the between time
while check_any_service_active(filtered_services):
stop_all_timers(filtered_services)
attempt=wait_for_all_services_to_stop(filtered_services,max_attempts,attempt,break_time_sec)
print("\nAll required services have stopped.")
attempt = wait_for_all_services_to_stop(filtered_services, max_attempts, attempt, break_time_sec)
print("All required services have stopped.")
def defrost(filtered_services):
"""
Defrost services by starting and enabling their timers.
"""
for service in filtered_services:
print(f"\nUnfreezing: {service}")
if service_file_exists(service,"timer"):
# Start and enable the corresponding timer, if it exists
timer_name = service + ".timer"
print(f"Unfreezing: {service}")
if service_file_exists(service, "timer"):
timer_name = f"{service}.timer"
subprocess.run(['systemctl', 'start', timer_name])
subprocess.run(['systemctl', 'enable', timer_name])
print(f"{timer_name} started and enabled.")
else:
print(f"No timer to activate.")
print("\nAll required services are started.")
print("No timer to activate for service.")
print("All required services are started.")
def main(services, ignored_services, action, timeout_sec):
filtered_services=filter_services(services, ignored_services)
print(f"Services to handle : {services}")
print(f"Services to ignore : {ignored_services}")
print(f"Services filtered : {filtered_services}")
"""
Main function to process the command-line arguments and perform actions.
"""
filtered_services = filter_services(services, ignored_services)
print(f"Services to handle: {services}")
print(f"Services to ignore: {ignored_services}")
print(f"Services filtered: {filtered_services}")
if action == 'freeze':
print("Freezing services.");
print("Freezing services.")
freeze(filtered_services, timeout_sec)
elif action == 'defrost':
print("Unfreezing services.");
print("Unfreezing services.")
defrost(filtered_services)
print('\nOverview:')
print("Overview:")
subprocess.run(['systemctl', 'list-timers'])
if __name__ == "__main__":
parser = argparse.ArgumentParser(description='freezes and defrost systemctl services and timers')
parser = argparse.ArgumentParser(description='Freezes and defrosts systemd services and timers.')
parser.add_argument('action', choices=['freeze', 'defrost'], help='Action to perform: freeze or defrost services.')
parser.add_argument('services', nargs='+', help='List of services to apply the action to')
parser.add_argument('--ignore', nargs='*', help='List of services to ignore in the action', default=[])
parser.add_argument('--timeout', help='Timeout for freezing services (e.g., 1h, 30min, 45s)', default='1h')
parser.add_argument('services', nargs='+', help='List of services to apply the action to.')
parser.add_argument('--ignore', nargs='*', help='List of services to ignore in the action.', default=[])
parser.add_argument('--timeout', help='Timeout for freezing services (e.g., 1h, 30min, 45s).', default='1h')
args = parser.parse_args()
services = args.services
ignored_services = args.ignore if args.ignore else []