247 lines
8.2 KiB
Python
247 lines
8.2 KiB
Python
import copy
|
|
import socket
|
|
|
|
from django.contrib.contenttypes import generic
|
|
from django.contrib.contenttypes.models import ContentType
|
|
from django.db import models
|
|
from django.utils.module_loading import autodiscover_modules
|
|
from django.utils.translation import ugettext_lazy as _
|
|
|
|
from orchestra.core.validators import validate_ip_address, ValidationError
|
|
from orchestra.models.fields import NullableCharField
|
|
#from orchestra.utils.apps import autodiscover
|
|
|
|
from . import settings
|
|
from .backends import ServiceBackend
|
|
|
|
|
|
class Server(models.Model):
|
|
""" Machine runing daemons (services) """
|
|
name = models.CharField(_("name"), max_length=256, unique=True)
|
|
address = NullableCharField(_("address"), max_length=256, blank=True,
|
|
null=True, unique=True, help_text=_("IP address or domain name"))
|
|
description = models.TextField(_("description"), blank=True)
|
|
os = models.CharField(_("operative system"), max_length=32,
|
|
choices=settings.ORCHESTRATION_OS_CHOICES,
|
|
default=settings.ORCHESTRATION_DEFAULT_OS)
|
|
|
|
def __str__(self):
|
|
return self.name
|
|
|
|
def get_address(self):
|
|
if self.address:
|
|
return self.address
|
|
return self.name
|
|
|
|
def get_ip(self):
|
|
if self.address:
|
|
return self.address
|
|
try:
|
|
validate_ip_address(self.name)
|
|
except ValidationError:
|
|
return socket.gethostbyname(self.name)
|
|
else:
|
|
return self.name
|
|
|
|
|
|
class BackendLog(models.Model):
|
|
RECEIVED = 'RECEIVED'
|
|
TIMEOUT = 'TIMEOUT'
|
|
STARTED = 'STARTED'
|
|
SUCCESS = 'SUCCESS'
|
|
FAILURE = 'FAILURE'
|
|
ERROR = 'ERROR'
|
|
REVOKED = 'REVOKED'
|
|
# Special state for mocked backendlogs
|
|
EXCEPTION = 'EXCEPTION'
|
|
|
|
STATES = (
|
|
(RECEIVED, RECEIVED),
|
|
(TIMEOUT, TIMEOUT),
|
|
(STARTED, STARTED),
|
|
(SUCCESS, SUCCESS),
|
|
(FAILURE, FAILURE),
|
|
(ERROR, ERROR),
|
|
(REVOKED, REVOKED),
|
|
)
|
|
|
|
backend = models.CharField(_("backend"), max_length=256)
|
|
state = models.CharField(_("state"), max_length=16, choices=STATES,
|
|
default=RECEIVED)
|
|
server = models.ForeignKey(Server, verbose_name=_("server"),
|
|
related_name='execution_logs')
|
|
script = models.TextField(_("script"))
|
|
stdout = models.TextField(_("stdout"))
|
|
stderr = models.TextField(_("stdin"))
|
|
traceback = models.TextField(_("traceback"))
|
|
exit_code = models.IntegerField(_("exit code"), null=True)
|
|
task_id = models.CharField(_("task ID"), max_length=36, unique=True, null=True,
|
|
help_text="Celery task ID when used as execution backend")
|
|
created_at = models.DateTimeField(_("created"), auto_now_add=True)
|
|
updated_at = models.DateTimeField(_("updated"), auto_now=True)
|
|
|
|
class Meta:
|
|
get_latest_by = 'id'
|
|
|
|
def __str__(self):
|
|
return "%s@%s" % (self.backend, self.server)
|
|
|
|
@property
|
|
def execution_time(self):
|
|
return (self.updated_at-self.created_at).total_seconds()
|
|
|
|
def backend_class(self):
|
|
return ServiceBackend.get_backend(self.backend)
|
|
|
|
|
|
class BackendOperation(models.Model):
|
|
"""
|
|
Encapsulates an operation, storing its related object, the action and the backend.
|
|
"""
|
|
DELETE = 'delete'
|
|
SAVE = 'save'
|
|
MONITOR = 'monitor'
|
|
EXCEEDED = 'exceeded'
|
|
RECOVERY = 'recovery'
|
|
|
|
log = models.ForeignKey('orchestration.BackendLog', related_name='operations')
|
|
backend = models.CharField(_("backend"), max_length=256)
|
|
action = models.CharField(_("action"), max_length=64)
|
|
content_type = models.ForeignKey(ContentType)
|
|
object_id = models.PositiveIntegerField()
|
|
|
|
instance = generic.GenericForeignKey('content_type', 'object_id')
|
|
|
|
class Meta:
|
|
verbose_name = _("Operation")
|
|
verbose_name_plural = _("Operations")
|
|
|
|
def __str__(self):
|
|
return '%s.%s(%s)' % (self.backend, self.action, self.instance)
|
|
|
|
def __hash__(self):
|
|
""" set() """
|
|
backend = getattr(self, 'backend', self.backend)
|
|
return hash(backend) + hash(self.instance) + hash(self.action)
|
|
|
|
def __eq__(self, operation):
|
|
""" set() """
|
|
return hash(self) == hash(operation)
|
|
|
|
@classmethod
|
|
def create(cls, backend, instance, action, servers=None):
|
|
op = cls(backend=backend.get_name(), instance=instance, action=action)
|
|
op.backend = backend
|
|
# instance should maintain any dynamic attribute until backend execution
|
|
# deep copy is prefered over copy otherwise objects will share same atributes (queryset cache)
|
|
op.instance = copy.deepcopy(instance)
|
|
op.servers = servers
|
|
return op
|
|
|
|
@classmethod
|
|
def execute(cls, operations, async=False):
|
|
from . import manager
|
|
scripts, block = manager.generate(operations)
|
|
return manager.execute(scripts, block=block, async=async)
|
|
|
|
@classmethod
|
|
def execute_action(cls, instance, action):
|
|
backends = ServiceBackend.get_backends(instance=instance, action=action)
|
|
operations = [cls.create(backend_cls, instance, action) for backend_cls in backends]
|
|
return cls.execute(operations)
|
|
|
|
def preload_context(self):
|
|
"""
|
|
Heuristic
|
|
Running get_context will prevent most of related objects do not exist errors
|
|
"""
|
|
if self.action == self.DELETE:
|
|
if hasattr(self.backend, 'get_context'):
|
|
self.backend().get_context(self.instance)
|
|
|
|
def backend_class(self):
|
|
return ServiceBackend.get_backend(self.backend)
|
|
|
|
|
|
autodiscover_modules('backends')
|
|
|
|
|
|
class Route(models.Model):
|
|
"""
|
|
Defines the routing that determine in which server a backend is executed
|
|
"""
|
|
backend = models.CharField(_("backend"), max_length=256,
|
|
choices=ServiceBackend.get_choices())
|
|
host = models.ForeignKey(Server, verbose_name=_("host"))
|
|
match = models.CharField(_("match"), max_length=256, blank=True, default='True',
|
|
help_text=_("Python expression used for selecting the targe host, "
|
|
"<em>instance</em> referes to the current object."))
|
|
# async = models.BooleanField(default=False)
|
|
# method = models.CharField(_("method"), max_lenght=32, choices=method_choices,
|
|
# default=MethodBackend.get_default())
|
|
is_active = models.BooleanField(_("active"), default=True)
|
|
|
|
class Meta:
|
|
unique_together = ('backend', 'host')
|
|
|
|
def __str__(self):
|
|
return "%s@%s" % (self.backend, self.host)
|
|
|
|
@property
|
|
def backend_class(self):
|
|
return ServiceBackend.get_backend(self.backend)
|
|
|
|
@classmethod
|
|
def get_servers(cls, operation, **kwargs):
|
|
cache = kwargs.get('cache', {})
|
|
servers = []
|
|
backend_cls = operation.backend
|
|
key = (backend_cls.get_name(), operation.action)
|
|
try:
|
|
routes = cache[key]
|
|
except KeyError:
|
|
cache[key] = []
|
|
for route in cls.objects.filter(is_active=True, backend=backend_cls.get_name()):
|
|
for action in backend_cls.get_actions():
|
|
_key = (route.backend, action)
|
|
try:
|
|
cache[_key].append(route)
|
|
except KeyError:
|
|
cache[_key] = [route]
|
|
routes = cache[key]
|
|
for route in routes:
|
|
if route.matches(operation.instance):
|
|
servers.append(route.host)
|
|
return servers
|
|
|
|
def clean(self):
|
|
if not self.match:
|
|
self.match = 'True'
|
|
if self.backend:
|
|
backend_model = self.backend_class.model_class()
|
|
try:
|
|
obj = backend_model.objects.all()[0]
|
|
except IndexError:
|
|
return
|
|
try:
|
|
bool(self.matches(obj))
|
|
except Exception as exception:
|
|
name = type(exception).__name__
|
|
raise ValidationError(': '.join((name, exception)))
|
|
|
|
def matches(self, instance):
|
|
safe_locals = {
|
|
'instance': instance,
|
|
'obj': instance,
|
|
instance._meta.model_name: instance,
|
|
}
|
|
return eval(self.match, safe_locals)
|
|
|
|
def enable(self):
|
|
self.is_active = True
|
|
self.save()
|
|
|
|
def disable(self):
|
|
self.is_active = False
|
|
self.save()
|