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@thefish
Last active September 5, 2017 15:25
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# -*- coding: utf-8 -*-
# Simple example which uses a pool of workers to carry out some tasks.
#
# Notice that the results will probably not come out of the output
# queue in the same in the same order as the corresponding tasks were
# put on the input queue. If it is important to get the results back
# in the original order then consider using `Pool.map()` or
# `Pool.imap()` (which will save on the amount of code needed anyway).
#
# Copyright (c) 2006-2008, R Oudkerk
# All rights reserved.
#
import time
import random
from multiprocessing import Process, Queue, current_process, freeze_support
#
# Function run by worker processes
#
def worker(input, output):
for func, args in iter(input.get, 'STOP'):
result = execute(func, args)
output.put(result)
#
# Function used to calculate result
#
def execute(func, args):
result = func(*args)
return '%s running task %s%s reports: \t\t %s' % \
(current_process().name, func.__name__, args, result)
#
# Functions referenced by tasks
#
# Тут функции чисто для примера, их лучше в отдельные модули вынести
#
def prepare(machine):
# подготовка машины к деплою (удаляем, мувим всю ненужную хуйню)
time.sleep(0.5*random.random())
# Здесь вместо строчки можно вернуть код выполнения чтобы понять нормально ли всё прошло
# или использовать отдельную error_queue для паник, например
return "... preparing " + machine
def deploy(package, machine):
# Установка пакетов
time.sleep(0.5*random.random())
return "... deploying " + package + " to " + machine
def setup(package, machine):
# Настройка пакетов
time.sleep(0.5*random.random())
return "... setting up " + package + " on " + machine
#
#
#
def main():
# В сколько процессов ебашим
NUMBER_OF_PROCESSES = 4
# Что ставим
PACKAGES = ["nginx", "postfix", "fpm"]
# Куда ставим
SERVERS = ["front01", "front02", "front03", "front04", "front05"]
#Тут можно не генеренные списки пихать, а прям руками написать, если надо
TASKS1 = [(prepare, (server, )) for server in SERVERS]
# Вторая пачка задач
TASKS2 = [(deploy, (package, server)) for package in PACKAGES for server in SERVERS]
TASKS3 = [(setup, (package, server)) for package in PACKAGES for server in SERVERS]
# Create queues
task_queue = Queue()
done_queue = Queue()
# Submit tasks
# Шлем первую пачку
for task in TASKS1:
task_queue.put(task)
# Start worker processes
for i in range(NUMBER_OF_PROCESSES):
Process(target=worker, args=(task_queue, done_queue)).start()
# Get and print results
# Получаем результат выполнения, и если
# надо - обрабатываем (откатываем всё взад например если функция вернула что-то не то)
print 'Unordered results:'
for i in range(len(TASKS1)):
print '\t', done_queue.get()
# Вторая пачка пошла
# Add more tasks using `put()`
for task in TASKS2:
task_queue.put(task)
# Get and print some more results
# Получаем результат
for i in range(len(TASKS2)):
print '\t', done_queue.get()
# Пример - если надо что-то выполнить,не запуская следующий этап
print "Waiting..."
# выполняем
time.sleep(3)
for task in TASKS3:
task_queue.put(task)
# Get and print some more results
# Получаем результат
for i in range(len(TASKS3)):
print '\t', done_queue.get()
# Tell child processes to stop
# Стопаем всю хуйню, готово
for i in range(NUMBER_OF_PROCESSES):
task_queue.put('STOP')
if __name__ == '__main__':
freeze_support()
main()
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