92 lines
2.9 KiB
Python
92 lines
2.9 KiB
Python
import logging
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import threading
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from django import db
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from orchestra.utils.python import import_class
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from . import settings
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from .helpers import send_report
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logger = logging.getLogger(__name__)
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def as_task(execute):
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def wrapper(*args, **kwargs):
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""" failures on the backend execution doesn't fuck the request transaction atomicity """
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db.transaction.set_autocommit(False)
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try:
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log = execute(*args, **kwargs)
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finally:
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db.transaction.commit()
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db.transaction.set_autocommit(True)
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if log.state != log.SUCCESS:
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send_report(execute, args, log)
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return log
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return wrapper
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def close_connection(execute):
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""" Threads have their own connection pool, closing it when finishing """
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def wrapper(*args, **kwargs):
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try:
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log = execute(*args, **kwargs)
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except:
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logger.error('EXCEPTION executing backend %s %s' % (str(args), str(kwargs)))
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raise
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else:
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# Using the wrapper function as threader messenger for the execute output
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wrapper.log = log
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finally:
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db.connection.close()
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return wrapper
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def execute(operations):
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""" generates and executes the operations on the servers """
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router = import_class(settings.ORCHESTRATION_ROUTER)
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scripts = {}
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cache = {}
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# Generate scripts per server+backend
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for operation in operations:
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logger.debug("Queued %s" % str(operation))
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servers = router.get_servers(operation, cache=cache)
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for server in servers:
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key = (server, operation.backend)
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if key not in scripts:
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scripts[key] = (operation.backend(), [operation])
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scripts[key][0].prepare()
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else:
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scripts[key][1].append(operation)
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# Get and call backend action method
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method = getattr(scripts[key][0], operation.action)
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method(operation.instance)
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# Execute scripts on each server
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threads = []
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executions = []
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for key, value in scripts.iteritems():
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server, __ = key
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backend, operations = value
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backend.commit()
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execute = as_task(backend.execute)
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execute = close_connection(execute)
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thread = threading.Thread(target=execute, args=(server,))
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thread.start()
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threads.append(thread)
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executions.append((execute, operations))
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[ thread.join() for thread in threads ]
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logs = []
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# collect results
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for execution, operations in executions:
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for operation in operations:
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logger.info("Executed %s" % str(operation))
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operation.log = execution.log
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operation.save()
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stdout = execution.log.stdout.strip()
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stdout and logger.debug('STDOUT %s', stdout)
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stderr = execution.log.stderr.strip()
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stderr and logger.debug('STDERR %s', stderr)
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logs.append(execution.log)
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return logs
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